finlabsindia/wp-content/plugins/beaver-builder-lite-version/includes/vendor/infusionsoft/xmlrpc-3.0/lib/xmlrpc.inc

<?php
// by Edd Dumbill (C) 1999-2002
// <edd@usefulinc.com>

// Copyright (c) 1999,2000,2002 Edd Dumbill.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
//    * Redistributions of source code must retain the above copyright
//      notice, this list of conditions and the following disclaimer.
//
//    * Redistributions in binary form must reproduce the above
//      copyright notice, this list of conditions and the following
//      disclaimer in the documentation and/or other materials provided
//      with the distribution.
//
//    * Neither the name of the "XML-RPC for PHP" nor the names of its
//      contributors may be used to endorse or promote products derived
//      from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
// OF THE POSSIBILITY OF SUCH DAMAGE.

if(!function_exists('xml_parser_create'))
{
    // For PHP 4 onward, XML functionality is always compiled-in on windows:
    // no more need to dl-open it. It might have been compiled out on *nix...
    if(strtoupper(substr(PHP_OS, 0, 3) != 'WIN'))
    {
        dl('xml.so');
    }
}

// G. Giunta 2005/01/29: declare global these variables,
// so that xmlrpc.inc will work even if included from within a function
// Milosch: 2005/08/07 - explicitly request these via $GLOBALS where used.
$GLOBALS['xmlrpcI4']='i4';
$GLOBALS['xmlrpcInt']='int';
$GLOBALS['xmlrpcBoolean']='boolean';
$GLOBALS['xmlrpcDouble']='double';
$GLOBALS['xmlrpcString']='string';
$GLOBALS['xmlrpcDateTime']='dateTime.iso8601';
$GLOBALS['xmlrpcBase64']='base64';
$GLOBALS['xmlrpcArray']='array';
$GLOBALS['xmlrpcStruct']='struct';
$GLOBALS['xmlrpcValue']='undefined';

$GLOBALS['xmlrpcTypes']=array(
    $GLOBALS['xmlrpcI4']       => 1,
    $GLOBALS['xmlrpcInt']      => 1,
    $GLOBALS['xmlrpcBoolean']  => 1,
    $GLOBALS['xmlrpcString']   => 1,
    $GLOBALS['xmlrpcDouble']   => 1,
    $GLOBALS['xmlrpcDateTime'] => 1,
    $GLOBALS['xmlrpcBase64']   => 1,
    $GLOBALS['xmlrpcArray']    => 2,
    $GLOBALS['xmlrpcStruct']   => 3
);

$GLOBALS['xmlrpc_valid_parents'] = array(
    'VALUE' => array('MEMBER', 'DATA', 'PARAM', 'FAULT'),
    'BOOLEAN' => array('VALUE'),
    'I4' => array('VALUE'),
    'INT' => array('VALUE'),
    'STRING' => array('VALUE'),
    'DOUBLE' => array('VALUE'),
    'DATETIME.ISO8601' => array('VALUE'),
    'BASE64' => array('VALUE'),
    'MEMBER' => array('STRUCT'),
    'NAME' => array('MEMBER'),
    'DATA' => array('ARRAY'),
    'ARRAY' => array('VALUE'),
    'STRUCT' => array('VALUE'),
    'PARAM' => array('PARAMS'),
    'METHODNAME' => array('METHODCALL'),
    'PARAMS' => array('METHODCALL', 'METHODRESPONSE'),
    'FAULT' => array('METHODRESPONSE'),
    'NIL' => array('VALUE'), // only used when extension activated
    'EX:NIL' => array('VALUE') // only used when extension activated
);

// define extra types for supporting NULL (useful for json or <NIL/>)
$GLOBALS['xmlrpcNull']='null';
$GLOBALS['xmlrpcTypes']['null']=1;

// Not in use anymore since 2.0. Shall we remove it?
/// @deprecated
$GLOBALS['xmlEntities']=array(
    'amp'  => '&',
    'quot' => '"',
    'lt'   => '<',
    'gt'   => '>',
    'apos' => "'"
);

// tables used for transcoding different charsets into us-ascii xml

$GLOBALS['xml_iso88591_Entities']=array();
$GLOBALS['xml_iso88591_Entities']['in'] = array();
$GLOBALS['xml_iso88591_Entities']['out'] = array();
for ($i = 0; $i < 32; $i++)
{
    $GLOBALS['xml_iso88591_Entities']['in'][] = chr($i);
    $GLOBALS['xml_iso88591_Entities']['out'][] = '&#'.$i.';';
}
for ($i = 160; $i < 256; $i++)
{
    $GLOBALS['xml_iso88591_Entities']['in'][] = chr($i);
    $GLOBALS['xml_iso88591_Entities']['out'][] = '&#'.$i.';';
}

/// @todo add to iso table the characters from cp_1252 range, i.e. 128 to 159?
/// These will NOT be present in true ISO-8859-1, but will save the unwary
/// windows user from sending junk (though no luck when reciving them...)
/*
$GLOBALS['xml_cp1252_Entities']=array();
for ($i = 128; $i < 160; $i++)
{
    $GLOBALS['xml_cp1252_Entities']['in'][] = chr($i);
}
$GLOBALS['xml_cp1252_Entities']['out'] = array(
    '&#x20AC;', '?',        '&#x201A;', '&#x0192;',
    '&#x201E;', '&#x2026;', '&#x2020;', '&#x2021;',
    '&#x02C6;', '&#x2030;', '&#x0160;', '&#x2039;',
    '&#x0152;', '?',        '&#x017D;', '?',
    '?',        '&#x2018;', '&#x2019;', '&#x201C;',
    '&#x201D;', '&#x2022;', '&#x2013;', '&#x2014;',
    '&#x02DC;', '&#x2122;', '&#x0161;', '&#x203A;',
    '&#x0153;', '?',        '&#x017E;', '&#x0178;'
);
*/

$GLOBALS['xmlrpcerr'] = array(
    'unknown_method'=>1,
    'invalid_return'=>2,
    'incorrect_params'=>3,
    'introspect_unknown'=>4,
    'http_error'=>5,
    'no_data'=>6,
    'no_ssl'=>7,
    'curl_fail'=>8,
    'invalid_request'=>15,
    'no_curl'=>16,
    'server_error'=>17,
    'multicall_error'=>18,
    'multicall_notstruct'=>9,
    'multicall_nomethod'=>10,
    'multicall_notstring'=>11,
    'multicall_recursion'=>12,
    'multicall_noparams'=>13,
    'multicall_notarray'=>14,

    'cannot_decompress'=>103,
    'decompress_fail'=>104,
    'dechunk_fail'=>105,
    'server_cannot_decompress'=>106,
    'server_decompress_fail'=>107
);

$GLOBALS['xmlrpcstr'] = array(
    'unknown_method'=>'Unknown method',
    'invalid_return'=>'Invalid return payload: enable debugging to examine incoming payload',
    'incorrect_params'=>'Incorrect parameters passed to method',
    'introspect_unknown'=>"Can't introspect: method unknown",
    'http_error'=>"Didn't receive 200 OK from remote server.",
    'no_data'=>'No data received from server.',
    'no_ssl'=>'No SSL support compiled in.',
    'curl_fail'=>'CURL error',
    'invalid_request'=>'Invalid request payload',
    'no_curl'=>'No CURL support compiled in.',
    'server_error'=>'Internal server error',
    'multicall_error'=>'Received from server invalid multicall response',
    'multicall_notstruct'=>'system.multicall expected struct',
    'multicall_nomethod'=>'missing methodName',
    'multicall_notstring'=>'methodName is not a string',
    'multicall_recursion'=>'recursive system.multicall forbidden',
    'multicall_noparams'=>'missing params',
    'multicall_notarray'=>'params is not an array',

    'cannot_decompress'=>'Received from server compressed HTTP and cannot decompress',
    'decompress_fail'=>'Received from server invalid compressed HTTP',
    'dechunk_fail'=>'Received from server invalid chunked HTTP',
    'server_cannot_decompress'=>'Received from client compressed HTTP request and cannot decompress',
    'server_decompress_fail'=>'Received from client invalid compressed HTTP request'
);

// The charset encoding used by the server for received messages and
// by the client for received responses when received charset cannot be determined
// or is not supported
$GLOBALS['xmlrpc_defencoding']='UTF-8';

// The encoding used internally by PHP.
// String values received as xml will be converted to this, and php strings will be converted to xml
// as if having been coded with this
$GLOBALS['xmlrpc_internalencoding']='UTF-8';

$GLOBALS['xmlrpcName']='XML-RPC for PHP';
$GLOBALS['xmlrpcVersion']='3.0.0.beta';

// let user errors start at 800
$GLOBALS['xmlrpcerruser']=800;
// let XML parse errors start at 100
$GLOBALS['xmlrpcerrxml']=100;

// formulate backslashes for escaping regexp
// Not in use anymore since 2.0. Shall we remove it?
/// @deprecated
$GLOBALS['xmlrpc_backslash']=chr(92).chr(92);

// set to TRUE to enable correct decoding of <NIL/> and <EX:NIL/> values
$GLOBALS['xmlrpc_null_extension']=false;

// set to TRUE to enable encoding of php NULL values to <EX:NIL/> instead of <NIL/>
$GLOBALS['xmlrpc_null_apache_encoding']=false;
$GLOBALS['xmlrpc_null_apache_encoding_ns']='http://ws.apache.org/xmlrpc/namespaces/extensions';

// used to store state during parsing
// quick explanation of components:
//   ac - used to accumulate values
//   isf - used to indicate a parsing fault (2) or xmlrpcresp fault (1)
//   isf_reason - used for storing xmlrpcresp fault string
//   lv - used to indicate "looking for a value": implements
//        the logic to allow values with no types to be strings
//   params - used to store parameters in method calls
//   method - used to store method name
//   stack - array with genealogy of xml elements names:
//           used to validate nesting of xmlrpc elements
$GLOBALS['_xh']=null;

/**
 * Convert a string to the correct XML representation in a target charset
 * To help correct communication of non-ascii chars inside strings, regardless
 * of the charset used when sending requests, parsing them, sending responses
 * and parsing responses, an option is to convert all non-ascii chars present in the message
 * into their equivalent 'charset entity'. Charset entities enumerated this way
 * are independent of the charset encoding used to transmit them, and all XML
 * parsers are bound to understand them.
 * Note that in the std case we are not sending a charset encoding mime type
 * along with http headers, so we are bound by RFC 3023 to emit strict us-ascii.
 *
 * @todo do a bit of basic benchmarking (strtr vs. str_replace)
 * @todo	make usage of iconv() or recode_string() or mb_string() where available
 */
function xmlrpc_encode_entitites($data, $src_encoding='', $dest_encoding='')
{
    /* Jordan Novak edit
    * clean out invalid characters before sending
    */
    $data = str_replace(array("&#11;", "&#0;", "&#20;", "’", "“",  "”"), "", $data);
    /*
     * End Jordan Novak edit
     */
    if ($src_encoding == '')
    {
        // lame, but we know no better...
        $src_encoding = $GLOBALS['xmlrpc_internalencoding'];
    }

    switch(strtoupper($src_encoding.'_'.$dest_encoding))
    {
        case 'ISO-8859-1_':
        case 'ISO-8859-1_US-ASCII':
            $escaped_data = str_replace(array('&', '"', "'", '<', '>'), array('&amp;', '&quot;', '&apos;', '&lt;', '&gt;'), $data);
            $escaped_data = str_replace($GLOBALS['xml_iso88591_Entities']['in'], $GLOBALS['xml_iso88591_Entities']['out'], $escaped_data);
            break;
        case 'ISO-8859-1_UTF-8':
            $escaped_data = str_replace(array('&', '"', "'", '<', '>'), array('&amp;', '&quot;', '&apos;', '&lt;', '&gt;'), $data);
            $escaped_data = utf8_encode($escaped_data);
            break;
        case 'ISO-8859-1_ISO-8859-1':
        case 'US-ASCII_US-ASCII':
        case 'US-ASCII_UTF-8':
        case 'US-ASCII_':
        case 'US-ASCII_ISO-8859-1':
        case 'UTF-8_UTF-8':
            //case 'CP1252_CP1252':
            $escaped_data = str_replace(array('&', '"', "'", '<', '>'), array('&amp;', '&quot;', '&apos;', '&lt;', '&gt;'), $data);
            break;
        case 'UTF-8_':
        case 'UTF-8_US-ASCII':
        case 'UTF-8_ISO-8859-1':
// NB: this will choke on invalid UTF-8, going most likely beyond EOF
            $escaped_data = '';
// be kind to users creating string xmlrpcvals out of different php types
            $data = (string) $data;
            $ns = strlen ($data);
            for ($nn = 0; $nn < $ns; $nn++)
            {
                $ch = $data[$nn];
                $ii = ord($ch);
                //1 7 0bbbbbbb (127)
                if ($ii < 128)
                {
                    /// @todo shall we replace this with a (supposedly) faster str_replace?
                    switch($ii){
                        case 34:
                            $escaped_data .= '&quot;';
                            break;
                        case 38:
                            $escaped_data .= '&amp;';
                            break;
                        case 39:
                            $escaped_data .= '&apos;';
                            break;
                        case 60:
                            $escaped_data .= '&lt;';
                            break;
                        case 62:
                            $escaped_data .= '&gt;';
                            break;
                        default:
                            $escaped_data .= $ch;
                    } // switch
                }
                //2 11 110bbbbb 10bbbbbb (2047)
                else if ($ii>>5 == 6)
                {
                    $b1 = ($ii & 31);
                    $ii = ord($data[$nn+1]);
                    $b2 = ($ii & 63);
                    $ii = ($b1 * 64) + $b2;
                    $ent = sprintf ('&#%d;', $ii);
                    $escaped_data .= $ent;
                    $nn += 1;
                }
                //3 16 1110bbbb 10bbbbbb 10bbbbbb
                else if ($ii>>4 == 14)
                {
                    $b1 = ($ii & 15);
                    $ii = ord($data[$nn+1]);
                    $b2 = ($ii & 63);
                    $ii = ord($data[$nn+2]);
                    $b3 = ($ii & 63);
                    $ii = ((($b1 * 64) + $b2) * 64) + $b3;
                    $ent = sprintf ('&#%d;', $ii);
                    $escaped_data .= $ent;
                    $nn += 2;
                }
                //4 21 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb
                else if ($ii>>3 == 30)
                {
                    $b1 = ($ii & 7);
                    $ii = ord($data[$nn+1]);
                    $b2 = ($ii & 63);
                    $ii = ord($data[$nn+2]);
                    $b3 = ($ii & 63);
                    $ii = ord($data[$nn+3]);
                    $b4 = ($ii & 63);
                    $ii = ((((($b1 * 64) + $b2) * 64) + $b3) * 64) + $b4;
                    $ent = sprintf ('&#%d;', $ii);
                    $escaped_data .= $ent;
                    $nn += 3;
                }
            }
            break;
        /*
                case 'CP1252_':
                case 'CP1252_US-ASCII':
                    $escaped_data = str_replace(array('&', '"', "'", '<', '>'), array('&amp;', '&quot;', '&apos;', '&lt;', '&gt;'), $data);
                    $escaped_data = str_replace($GLOBALS['xml_iso88591_Entities']['in'], $GLOBALS['xml_iso88591_Entities']['out'], $escaped_data);
                    $escaped_data = str_replace($GLOBALS['xml_cp1252_Entities']['in'], $GLOBALS['xml_cp1252_Entities']['out'], $escaped_data);
                    break;
                case 'CP1252_UTF-8':
                    $escaped_data = str_replace(array('&', '"', "'", '<', '>'), array('&amp;', '&quot;', '&apos;', '&lt;', '&gt;'), $data);
                    /// @todo we could use real UTF8 chars here instead of xml entities... (note that utf_8 encode all allone will NOT convert them)
                    $escaped_data = str_replace($GLOBALS['xml_cp1252_Entities']['in'], $GLOBALS['xml_cp1252_Entities']['out'], $escaped_data);
                    $escaped_data = utf8_encode($escaped_data);
                    break;
                case 'CP1252_ISO-8859-1':
                    $escaped_data = str_replace(array('&', '"', "'", '<', '>'), array('&amp;', '&quot;', '&apos;', '&lt;', '&gt;'), $data);
                    // we might as well replave all funky chars with a '?' here, but we are kind and leave it to the receiving application layer to decide what to do with these weird entities...
                    $escaped_data = str_replace($GLOBALS['xml_cp1252_Entities']['in'], $GLOBALS['xml_cp1252_Entities']['out'], $escaped_data);
                    break;
        */
        default:
            $escaped_data = '';
            error_log("Converting from $src_encoding to $dest_encoding: not supported...");
    }
    return $escaped_data;
}

/// xml parser handler function for opening element tags
function xmlrpc_se($parser, $name, $attrs, $accept_single_vals=false)
{
    // if invalid xmlrpc already detected, skip all processing
    if ($GLOBALS['_xh']['isf'] < 2)
    {
        // check for correct element nesting
        // top level element can only be of 2 types
        /// @todo optimization creep: save this check into a bool variable, instead of using count() every time:
        ///       there is only a single top level element in xml anyway
        if (count($GLOBALS['_xh']['stack']) == 0)
        {
            if ($name != 'METHODRESPONSE' && $name != 'METHODCALL' && (
                    $name != 'VALUE' && !$accept_single_vals))
            {
                $GLOBALS['_xh']['isf'] = 2;
                $GLOBALS['_xh']['isf_reason'] = 'missing top level xmlrpc element';
                return;
            }
            else
            {
                $GLOBALS['_xh']['rt'] = strtolower($name);
                $GLOBALS['_xh']['rt'] = strtolower($name);
            }
        }
        else
        {
            // not top level element: see if parent is OK
            $parent = end($GLOBALS['_xh']['stack']);
            if (!array_key_exists($name, $GLOBALS['xmlrpc_valid_parents']) || !in_array($parent, $GLOBALS['xmlrpc_valid_parents'][$name]))
            {
                $GLOBALS['_xh']['isf'] = 2;
                $GLOBALS['_xh']['isf_reason'] = "xmlrpc element $name cannot be child of $parent";
                return;
            }
        }

        switch($name)
        {
            // optimize for speed switch cases: most common cases first
            case 'VALUE':
                /// @todo we could check for 2 VALUE elements inside a MEMBER or PARAM element
                $GLOBALS['_xh']['vt']='value'; // indicator: no value found yet
                $GLOBALS['_xh']['ac']='';
                $GLOBALS['_xh']['lv']=1;
                $GLOBALS['_xh']['php_class']=null;
                break;
            case 'I4':
            case 'INT':
            case 'STRING':
            case 'BOOLEAN':
            case 'DOUBLE':
            case 'DATETIME.ISO8601':
            case 'BASE64':
                if ($GLOBALS['_xh']['vt']!='value')
                {
                    //two data elements inside a value: an error occurred!
                    $GLOBALS['_xh']['isf'] = 2;
                    $GLOBALS['_xh']['isf_reason'] = "$name element following a {$GLOBALS['_xh']['vt']} element inside a single value";
                    return;
                }
                $GLOBALS['_xh']['ac']=''; // reset the accumulator
                break;
            case 'STRUCT':
            case 'ARRAY':
                if ($GLOBALS['_xh']['vt']!='value')
                {
                    //two data elements inside a value: an error occurred!
                    $GLOBALS['_xh']['isf'] = 2;
                    $GLOBALS['_xh']['isf_reason'] = "$name element following a {$GLOBALS['_xh']['vt']} element inside a single value";
                    return;
                }
                // create an empty array to hold child values, and push it onto appropriate stack
                $cur_val = array();
                $cur_val['values'] = array();
                $cur_val['type'] = $name;
                // check for out-of-band information to rebuild php objs
                // and in case it is found, save it
                if (@isset($attrs['PHP_CLASS']))
                {
                    $cur_val['php_class'] = $attrs['PHP_CLASS'];
                }
                $GLOBALS['_xh']['valuestack'][] = $cur_val;
                $GLOBALS['_xh']['vt']='data'; // be prepared for a data element next
                break;
            case 'DATA':
                if ($GLOBALS['_xh']['vt']!='data')
                {
                    //two data elements inside a value: an error occurred!
                    $GLOBALS['_xh']['isf'] = 2;
                    $GLOBALS['_xh']['isf_reason'] = "found two data elements inside an array element";
                    return;
                }
            case 'METHODCALL':
            case 'METHODRESPONSE':
            case 'PARAMS':
                // valid elements that add little to processing
                break;
            case 'METHODNAME':
            case 'NAME':
                /// @todo we could check for 2 NAME elements inside a MEMBER element
                $GLOBALS['_xh']['ac']='';
                break;
            case 'FAULT':
                $GLOBALS['_xh']['isf']=1;
                break;
            case 'MEMBER':
                $GLOBALS['_xh']['valuestack'][count($GLOBALS['_xh']['valuestack'])-1]['name']=''; // set member name to null, in case we do not find in the xml later on
            //$GLOBALS['_xh']['ac']='';
            // Drop trough intentionally
            case 'PARAM':
                // clear value type, so we can check later if no value has been passed for this param/member
                $GLOBALS['_xh']['vt']=null;
                break;
            case 'NIL':
                break;
            case 'EX:NIL':
                if ($GLOBALS['xmlrpc_null_extension'])
                {
                    if ($GLOBALS['_xh']['vt']!='value')
                    {
                        //two data elements inside a value: an error occurred!
                        $GLOBALS['_xh']['isf'] = 2;
                        $GLOBALS['_xh']['isf_reason'] = "$name element following a {$GLOBALS['_xh']['vt']} element inside a single value";
                        return;
                    }
                    $GLOBALS['_xh']['ac']=''; // reset the accumulator
                    break;
                }
            // we do not support the <NIL/> extension, so
            // drop through intentionally
            default:
                /// INVALID ELEMENT: RAISE ISF so that it is later recognized!!!
                $GLOBALS['_xh']['isf'] = 2;
                $GLOBALS['_xh']['isf_reason'] = "found not-xmlrpc xml element $name";
                break;
        }

        // Save current element name to stack, to validate nesting
        $GLOBALS['_xh']['stack'][] = $name;

        /// @todo optimization creep: move this inside the big switch() above
        if($name!='VALUE')
        {
            $GLOBALS['_xh']['lv']=0;
        }
    }
}

/// Used in decoding xml chunks that might represent single xmlrpc values
function xmlrpc_se_any($parser, $name, $attrs)
{
    xmlrpc_se($parser, $name, $attrs, true);
}

/// xml parser handler function for close element tags
function xmlrpc_ee($parser, $name, $rebuild_xmlrpcvals = true)
{
    if ($GLOBALS['_xh']['isf'] < 2)
    {
        // push this element name from stack
        // NB: if XML validates, correct opening/closing is guaranteed and
        // we do not have to check for $name == $curr_elem.
        // we also checked for proper nesting at start of elements...
        $curr_elem = array_pop($GLOBALS['_xh']['stack']);

        switch($name)
        {
            case 'VALUE':
                // This if() detects if no scalar was inside <VALUE></VALUE>
                if ($GLOBALS['_xh']['vt']=='value')
                {
                    $GLOBALS['_xh']['value']=$GLOBALS['_xh']['ac'];
                    $GLOBALS['_xh']['vt']=$GLOBALS['xmlrpcString'];
                }

                if ($rebuild_xmlrpcvals)
                {
                    // build the xmlrpc val out of the data received, and substitute it
                    $temp = new xmlrpcval($GLOBALS['_xh']['value'], $GLOBALS['_xh']['vt']);
                    // in case we got info about underlying php class, save it
                    // in the object we're rebuilding
                    if (isset($GLOBALS['_xh']['php_class']))
                        $temp->_php_class = $GLOBALS['_xh']['php_class'];
                    // check if we are inside an array or struct:
                    // if value just built is inside an array, let's move it into array on the stack
                    $vscount = count($GLOBALS['_xh']['valuestack']);
                    if ($vscount && $GLOBALS['_xh']['valuestack'][$vscount-1]['type']=='ARRAY')
                    {
                        $GLOBALS['_xh']['valuestack'][$vscount-1]['values'][] = $temp;
                    }
                    else
                    {
                        $GLOBALS['_xh']['value'] = $temp;
                    }
                }
                else
                {
                    /// @todo this needs to treat correctly php-serialized objects,
                    /// since std deserializing is done by php_xmlrpc_decode,
                    /// which we will not be calling...
                    if (isset($GLOBALS['_xh']['php_class']))
                    {
                    }

                    // check if we are inside an array or struct:
                    // if value just built is inside an array, let's move it into array on the stack
                    $vscount = count($GLOBALS['_xh']['valuestack']);
                    if ($vscount && $GLOBALS['_xh']['valuestack'][$vscount-1]['type']=='ARRAY')
                    {
                        $GLOBALS['_xh']['valuestack'][$vscount-1]['values'][] = $GLOBALS['_xh']['value'];
                    }
                }
                break;
            case 'BOOLEAN':
            case 'I4':
            case 'INT':
            case 'STRING':
            case 'DOUBLE':
            case 'DATETIME.ISO8601':
            case 'BASE64':
                $GLOBALS['_xh']['vt']=strtolower($name);
                /// @todo: optimization creep - remove the if/elseif cycle below
                /// since the case() in which we are already did that
                if ($name=='STRING')
                {
                    $GLOBALS['_xh']['value']=$GLOBALS['_xh']['ac'];
                }
                elseif ($name=='DATETIME.ISO8601')
                {
                    if (!preg_match('/^[0-9]{8}T[0-9]{2}:[0-9]{2}:[0-9]{2}$/', $GLOBALS['_xh']['ac']))
                    {
                        error_log('XML-RPC: invalid value received in DATETIME: '.$GLOBALS['_xh']['ac']);
                    }
                    $GLOBALS['_xh']['vt']=$GLOBALS['xmlrpcDateTime'];
                    $GLOBALS['_xh']['value']=$GLOBALS['_xh']['ac'];
                }
                elseif ($name=='BASE64')
                {
                    /// @todo check for failure of base64 decoding / catch warnings
                    $GLOBALS['_xh']['value']=base64_decode($GLOBALS['_xh']['ac']);
                }
                elseif ($name=='BOOLEAN')
                {
                    // special case here: we translate boolean 1 or 0 into PHP
                    // constants true or false.
                    // Strings 'true' and 'false' are accepted, even though the
                    // spec never mentions them (see eg. Blogger api docs)
                    // NB: this simple checks helps a lot sanitizing input, ie no
                    // security problems around here
                    if ($GLOBALS['_xh']['ac']=='1' || strcasecmp($GLOBALS['_xh']['ac'], 'true') == 0)
                    {
                        $GLOBALS['_xh']['value']=true;
                    }
                    else
                    {
                        // log if receiveing something strange, even though we set the value to false anyway
                        if ($GLOBALS['_xh']['ac']!='0' && strcasecmp($GLOBALS['_xh']['ac'], 'false') != 0)
                            error_log('XML-RPC: invalid value received in BOOLEAN: '.$GLOBALS['_xh']['ac']);
                        $GLOBALS['_xh']['value']=false;
                    }
                }
                elseif ($name=='DOUBLE')
                {
                    // we have a DOUBLE
                    // we must check that only 0123456789-.<space> are characters here
                    // NOTE: regexp could be much stricter than this...
                    if (!preg_match('/^[+-eE0123456789 \t.]+$/', $GLOBALS['_xh']['ac']))
                    {
                        /// @todo: find a better way of throwing an error than this!
                        error_log('XML-RPC: non numeric value received in DOUBLE: '.$GLOBALS['_xh']['ac']);
                        $GLOBALS['_xh']['value']='ERROR_NON_NUMERIC_FOUND';
                    }
                    else
                    {
                        // it's ok, add it on
                        $GLOBALS['_xh']['value']=(double)$GLOBALS['_xh']['ac'];
                    }
                }
                else
                {
                    // we have an I4/INT
                    // we must check that only 0123456789-<space> are characters here
                    if (!preg_match('/^[+-]?[0123456789 \t]+$/', $GLOBALS['_xh']['ac']))
                    {
                        /// @todo find a better way of throwing an error than this!
                        error_log('XML-RPC: non numeric value received in INT: '.$GLOBALS['_xh']['ac']);
                        $GLOBALS['_xh']['value']='ERROR_NON_NUMERIC_FOUND';
                    }
                    else
                    {
                        // it's ok, add it on
                        $GLOBALS['_xh']['value']=(int)$GLOBALS['_xh']['ac'];
                    }
                }
                //$GLOBALS['_xh']['ac']=''; // is this necessary?
                $GLOBALS['_xh']['lv']=3; // indicate we've found a value
                break;
            case 'NAME':
                $GLOBALS['_xh']['valuestack'][count($GLOBALS['_xh']['valuestack'])-1]['name'] = $GLOBALS['_xh']['ac'];
                break;
            case 'MEMBER':
                //$GLOBALS['_xh']['ac']=''; // is this necessary?
                // add to array in the stack the last element built,
                // unless no VALUE was found
                if ($GLOBALS['_xh']['vt'])
                {
                    $vscount = count($GLOBALS['_xh']['valuestack']);
                    $GLOBALS['_xh']['valuestack'][$vscount-1]['values'][$GLOBALS['_xh']['valuestack'][$vscount-1]['name']] = $GLOBALS['_xh']['value'];
                } else
                    error_log('XML-RPC: missing VALUE inside STRUCT in received xml');
                break;
            case 'DATA':
                //$GLOBALS['_xh']['ac']=''; // is this necessary?
                $GLOBALS['_xh']['vt']=null; // reset this to check for 2 data elements in a row - even if they're empty
                break;
            case 'STRUCT':
            case 'ARRAY':
                // fetch out of stack array of values, and promote it to current value
                $curr_val = array_pop($GLOBALS['_xh']['valuestack']);
                $GLOBALS['_xh']['value'] = $curr_val['values'];
                $GLOBALS['_xh']['vt']=strtolower($name);
                if (isset($curr_val['php_class']))
                {
                    $GLOBALS['_xh']['php_class'] = $curr_val['php_class'];
                }
                break;
            case 'PARAM':
                // add to array of params the current value,
                // unless no VALUE was found
                if ($GLOBALS['_xh']['vt'])
                {
                    $GLOBALS['_xh']['params'][]=$GLOBALS['_xh']['value'];
                    $GLOBALS['_xh']['pt'][]=$GLOBALS['_xh']['vt'];
                }
                else
                    error_log('XML-RPC: missing VALUE inside PARAM in received xml');
                break;
            case 'METHODNAME':
                $GLOBALS['_xh']['method']=preg_replace('/^[\n\r\t ]+/', '', $GLOBALS['_xh']['ac']);
                break;
            case 'NIL':
            case 'EX:NIL':
                if ($GLOBALS['xmlrpc_null_extension'])
                {
                    $GLOBALS['_xh']['vt']='null';
                    $GLOBALS['_xh']['value']=null;
                    $GLOBALS['_xh']['lv']=3;
                    break;
                }
            // drop through intentionally if nil extension not enabled
            case 'PARAMS':
            case 'FAULT':
            case 'METHODCALL':
            case 'METHORESPONSE':
                break;
            default:
                // End of INVALID ELEMENT!
                // shall we add an assert here for unreachable code???
                break;
        }
    }
}

/// Used in decoding xmlrpc requests/responses without rebuilding xmlrpc values
function xmlrpc_ee_fast($parser, $name)
{
    xmlrpc_ee($parser, $name, false);
}

/// xml parser handler function for character data
function xmlrpc_cd($parser, $data)
{
    // skip processing if xml fault already detected
    if ($GLOBALS['_xh']['isf'] < 2)
    {
        // "lookforvalue==3" means that we've found an entire value
        // and should discard any further character data
        if($GLOBALS['_xh']['lv']!=3)
        {
            // G. Giunta 2006-08-23: useless change of 'lv' from 1 to 2
            //if($GLOBALS['_xh']['lv']==1)
            //{
            // if we've found text and we're just in a <value> then
            // say we've found a value
            //$GLOBALS['_xh']['lv']=2;
            //}
            // we always initialize the accumulator before starting parsing, anyway...
            //if(!@isset($GLOBALS['_xh']['ac']))
            //{
            //	$GLOBALS['_xh']['ac'] = '';
            //}
            $GLOBALS['_xh']['ac'].=$data;
        }
    }
}

/// xml parser handler function for 'other stuff', ie. not char data or
/// element start/end tag. In fact it only gets called on unknown entities...
function xmlrpc_dh($parser, $data)
{
    // skip processing if xml fault already detected
    if ($GLOBALS['_xh']['isf'] < 2)
    {
        if(substr($data, 0, 1) == '&' && substr($data, -1, 1) == ';')
        {
            // G. Giunta 2006-08-25: useless change of 'lv' from 1 to 2
            //if($GLOBALS['_xh']['lv']==1)
            //{
            //	$GLOBALS['_xh']['lv']=2;
            //}
            $GLOBALS['_xh']['ac'].=$data;
        }
    }
    return true;
}


class xmlrpc_client
{
    var $path;
    var $server;
    var $port=0;
    var $method='http';
    var $errno;
    var $errstr;
    var $debug=0;
    var $username='';
    var $password='';
    var $authtype=1;
    var $cert='';
    var $certpass='';
    var $cacert='';
    var $cacertdir='';
    var $key='';
    var $keypass='';
    var $verifypeer=true;
    var $verifyhost=2;
    var $no_multicall=false;
    var $proxy='';
    var $proxyport=0;
    var $proxy_user='';
    var $proxy_pass='';
    var $proxy_authtype=1;
    var $cookies=array();
    var $extracurlopts=array();
    var $extraUrlParams = null;
    var $curlError = null;
    var $curlInfo = null;
    var $curlErrorNo = null;

    /**
     * List of http compression methods accepted by the client for responses.
     * NB: PHP supports deflate, gzip compressions out of the box if compiled w. zlib
     *
     * NNB: you can set it to any non-empty array for HTTP11 and HTTPS, since
     * in those cases it will be up to CURL to decide the compression methods
     * it supports. You might check for the presence of 'zlib' in the output of
     * curl_version() to determine wheter compression is supported or not
     */
    var $accepted_compression = array();
    /**
     * Name of compression scheme to be used for sending requests.
     * Either null, gzip or deflate
     */
    var $request_compression = '';
    /**
     * CURL handle: used for keep-alive connections (PHP 4.3.8 up, see:
     * http://curl.haxx.se/docs/faq.html#7.3)
     */
    var $xmlrpc_curl_handle = null;
    /// Whether to use persistent connections for http 1.1 and https
    var $keepalive = false;
    /// Charset encodings that can be decoded without problems by the client
    var $accepted_charset_encodings = array();
    /// Charset encoding to be used in serializing request. NULL = use ASCII
    var $request_charset_encoding = '';
    /**
     * Decides the content of xmlrpcresp objects returned by calls to send()
     * valid strings are 'xmlrpcvals', 'phpvals' or 'xml'
     */
    var $return_type = 'xmlrpcvals';
    /**
     * Sent to servers in http headers
     */
    var $user_agent;

    /**
     * @param string $path either the complete server URL or the PATH part of the xmlrc server URL, e.g. /xmlrpc/server.php
     * @param string $server the server name / ip address
     * @param integer $port the port the server is listening on, defaults to 80 or 443 depending on protocol used
     * @param string $method the http protocol variant: defaults to 'http', 'https' and 'http11' can be used if CURL is installed
     */
    function __construct($path, $server='', $port='', $method='')
    {
        // allow user to specify all params in $path
        if($server == '' and $port == '' and $method == '')
        {
            $parts = parse_url($path);
            $server = $parts['host'];
            $path = isset($parts['path']) ? $parts['path'] : '';
            if(isset($parts['query']))
            {
                $path .= '?'.$parts['query'];
            }
            if(isset($parts['fragment']))
            {
                $path .= '#'.$parts['fragment'];
            }
            if(isset($parts['port']))
            {
                $port = $parts['port'];
            }
            if(isset($parts['scheme']))
            {
                $method = $parts['scheme'];
            }
            if(isset($parts['user']))
            {
                $this->username = $parts['user'];
            }
            if(isset($parts['pass']))
            {
                $this->password = $parts['pass'];
            }
        }
        if($path == '' || $path[0] != '/')
        {
            $this->path='/'.$path;
        }
        else
        {
            $this->path=$path;
        }
        $this->server=$server;
        if($port != '')
        {
            $this->port=$port;
        }
        if($method != '')
        {
            $this->method=$method;
        }

        // if ZLIB is enabled, let the client by default accept compressed responses
        if(function_exists('gzinflate') || (
                function_exists('curl_init') && (($info = curl_version()) &&
                    ((is_string($info) && strpos($info, 'zlib') !== null) || isset($info['libz_version'])))
            ))
        {
            $this->accepted_compression = array('gzip', 'deflate');
        }

        // keepalives: enabled by default
        $this->keepalive = true;

        // by default the xml parser can support these 3 charset encodings
        $this->accepted_charset_encodings = array('UTF-8', 'ISO-8859-1', 'US-ASCII');

        // initialize user_agent string
        $this->user_agent = $GLOBALS['xmlrpcName'] . ' ' . $GLOBALS['xmlrpcVersion'];
    }

    /**
     * Enables/disables the echoing to screen of the xmlrpc responses received
     * @param integer $in values 0, 1 and 2 are supported (2 = echo sent msg too, before received response)
     * @access public
     */
    function setDebug($in)
    {
        $this->debug=$in;
    }

    /**
     * Add some http BASIC AUTH credentials, used by the client to authenticate
     * @param string $u username
     * @param string $p password
     * @param integer $t auth type. See curl_setopt man page for supported auth types. Defaults to CURLAUTH_BASIC (basic auth)
     * @access public
     */
    function setCredentials($u, $p, $t=1)
    {
        $this->username=$u;
        $this->password=$p;
        $this->authtype=$t;
    }

    /**
     * Add a client-side https certificate
     * @param string $cert
     * @param string $certpass
     * @access public
     */
    function setCertificate($cert, $certpass)
    {
        $this->cert = $cert;
        $this->certpass = $certpass;
    }

    /**
     * Add a CA certificate to verify server with (see man page about
     * CURLOPT_CAINFO for more details)
     * @param string $cacert certificate file name (or dir holding certificates)
     * @param bool $is_dir set to true to indicate cacert is a dir. defaults to false
     * @access public
     */
    function setCaCertificate($cacert, $is_dir=false)
    {
        if ($is_dir)
        {
            $this->cacertdir = $cacert;
        }
        else
        {
            $this->cacert = $cacert;
        }
    }

    /**
     * Set attributes for SSL communication: private SSL key
     * NB: does not work in older php/curl installs
     * Thanks to Daniel Convissor
     * @param string $key The name of a file containing a private SSL key
     * @param string $keypass The secret password needed to use the private SSL key
     * @access public
     */
    function setKey($key, $keypass)
    {
        $this->key = $key;
        $this->keypass = $keypass;
    }

    /**
     * Set attributes for SSL communication: verify server certificate
     * @param bool $i enable/disable verification of peer certificate
     * @access public
     */
    function setSSLVerifyPeer($i)
    {
        $this->verifypeer = $i;
    }

    /**
     * Set attributes for SSL communication: verify match of server cert w. hostname
     * @param int $i
     * @access public
     */
    function setSSLVerifyHost($i)
    {
        $this->verifyhost = $i;
    }

    /**
     * Set proxy info
     * @param string $proxyhost
     * @param string $proxyport Defaults to 8080 for HTTP and 443 for HTTPS
     * @param string $proxyusername Leave blank if proxy has public access
     * @param string $proxypassword Leave blank if proxy has public access
     * @param int $proxyauthtype set to constant CURLAUTH_NTLM to use NTLM auth with proxy
     * @access public
     */
    function setProxy($proxyhost, $proxyport, $proxyusername = '', $proxypassword = '', $proxyauthtype = 1)
    {
        $this->proxy = $proxyhost;
        $this->proxyport = $proxyport;
        $this->proxy_user = $proxyusername;
        $this->proxy_pass = $proxypassword;
        $this->proxy_authtype = $proxyauthtype;
    }

    /**
     * Enables/disables reception of compressed xmlrpc responses.
     * Note that enabling reception of compressed responses merely adds some standard
     * http headers to xmlrpc requests. It is up to the xmlrpc server to return
     * compressed responses when receiving such requests.
     * @param string $compmethod either 'gzip', 'deflate', 'any' or ''
     * @access public
     */
    function setAcceptedCompression($compmethod)
    {
        if ($compmethod == 'any')
            $this->accepted_compression = array('gzip', 'deflate');
        else
            if ($compmethod == false )
                $this->accepted_compression = array();
            else
                $this->accepted_compression = array($compmethod);
    }

    /**
     * Enables/disables http compression of xmlrpc request.
     * Take care when sending compressed requests: servers might not support them
     * (and automatic fallback to uncompressed requests is not yet implemented)
     * @param string $compmethod either 'gzip', 'deflate' or ''
     * @access public
     */
    function setRequestCompression($compmethod)
    {
        $this->request_compression = $compmethod;
    }

    /**
     * Adds a cookie to list of cookies that will be sent to server.
     * NB: setting any param but name and value will turn the cookie into a 'version 1' cookie:
     * do not do it unless you know what you are doing
     * @param string $name
     * @param string $value
     * @param string $path
     * @param string $domain
     * @param int $port
     * @access public
     *
     * @todo check correctness of urlencoding cookie value (copied from php way of doing it...)
     */
    function setCookie($name, $value='', $path='', $domain='', $port=null)
    {
        $this->cookies[$name]['value'] = urlencode($value);
        if ($path || $domain || $port)
        {
            $this->cookies[$name]['path'] = $path;
            $this->cookies[$name]['domain'] = $domain;
            $this->cookies[$name]['port'] = $port;
            $this->cookies[$name]['version'] = 1;
        }
        else
        {
            $this->cookies[$name]['version'] = 0;
        }
    }

    /**
     * Directly set cURL options, for extra flexibility
     * It allows eg. to bind client to a specific IP interface / address
     * @param array $options
     */
    function SetCurlOptions( $options )
    {
        $this->extracurlopts = $options;
    }

    /**
     * Set user-agent string that will be used by this client instance
     * in http headers sent to the server
     */
    function SetUserAgent( $agentstring )
    {
        $this->user_agent = $agentstring;
    }

    /**
     * Send an xmlrpc request
     * @param mixed $msg The message object, or an array of messages for using multicall, or the complete xml representation of a request
     * @param integer $timeout Connection timeout, in seconds, If unspecified, a platform specific timeout will apply
     * @param string $method if left unspecified, the http protocol chosen during creation of the object will be used
     * @return xmlrpcresp
     * @access public
     */
    function& send($msg, $timeout=0, $method='')
    {
        // if user deos not specify http protocol, use native method of this client
        // (i.e. method set during call to constructor)
        if($method == '')
        {
            $method = $this->method;
        }

        if(is_array($msg))
        {
            // $msg is an array of xmlrpcmsg's
            $r = $this->multicall($msg, $timeout, $method);
            return $r;
        }
        elseif(is_string($msg))
        {
            $n = new xmlrpcmsg('');
            $n->payload = $msg;
            $msg = $n;
        }

        // where msg is an xmlrpcmsg
        $msg->debug=$this->debug;

        if($method == 'https')
        {
            $r =& $this->sendPayloadHTTPS(
                $msg,
                $this->server,
                $this->port,
                $timeout,
                $this->username,
                $this->password,
                $this->authtype,
                $this->cert,
                $this->certpass,
                $this->cacert,
                $this->cacertdir,
                $this->proxy,
                $this->proxyport,
                $this->proxy_user,
                $this->proxy_pass,
                $this->proxy_authtype,
                $this->keepalive,
                $this->key,
                $this->keypass
            );
        }
        elseif($method == 'http11')
        {
            $r =& $this->sendPayloadCURL(
                $msg,
                $this->server,
                $this->port,
                $timeout,
                $this->username,
                $this->password,
                $this->authtype,
                null,
                null,
                null,
                null,
                $this->proxy,
                $this->proxyport,
                $this->proxy_user,
                $this->proxy_pass,
                $this->proxy_authtype,
                'http',
                $this->keepalive
            );
        }
        else
        {
            $r =& $this->sendPayloadHTTP10(
                $msg,
                $this->server,
                $this->port,
                $timeout,
                $this->username,
                $this->password,
                $this->authtype,
                $this->proxy,
                $this->proxyport,
                $this->proxy_user,
                $this->proxy_pass,
                $this->proxy_authtype
            );
        }

        return $r;
    }

    /**
     * @access private
     */
    function &sendPayloadHTTP10($msg, $server, $port, $timeout=0,
                                $username='', $password='', $authtype=1, $proxyhost='',
                                $proxyport=0, $proxyusername='', $proxypassword='', $proxyauthtype=1)
    {
        if($port==0)
        {
            $port=80;
        }

        // Only create the payload if it was not created previously
        if(empty($msg->payload))
        {
            $msg->createPayload($this->request_charset_encoding);
        }

        $payload = $msg->payload;
        // Deflate request body and set appropriate request headers
        if(function_exists('gzdeflate') && ($this->request_compression == 'gzip' || $this->request_compression == 'deflate'))
        {
            if($this->request_compression == 'gzip')
            {
                $a = @gzencode($payload);
                if($a)
                {
                    $payload = $a;
                    $encoding_hdr = "Content-Encoding: gzip\r\n";
                }
            }
            else
            {
                $a = @gzcompress($payload);
                if($a)
                {
                    $payload = $a;
                    $encoding_hdr = "Content-Encoding: deflate\r\n";
                }
            }
        }
        else
        {
            $encoding_hdr = '';
        }

        // thanks to Grant Rauscher <grant7@firstworld.net> for this
        $credentials='';
        if($username!='')
        {
            $credentials='Authorization: Basic ' . base64_encode($username . ':' . $password) . "\r\n";
            if ($authtype != 1)
            {
                error_log('XML-RPC: '.__METHOD__.': warning. Only Basic auth is supported with HTTP 1.0');
            }
        }

        $accepted_encoding = '';
        if(is_array($this->accepted_compression) && count($this->accepted_compression))
        {
            $accepted_encoding = 'Accept-Encoding: ' . implode(', ', $this->accepted_compression) . "\r\n";
        }

        $proxy_credentials = '';
        if($proxyhost)
        {
            if($proxyport == 0)
            {
                $proxyport = 8080;
            }
            $connectserver = $proxyhost;
            $connectport = $proxyport;
            $uri = 'http://'.$server.':'.$port.$this->path;
            if($proxyusername != '')
            {
                if ($proxyauthtype != 1)
                {
                    error_log('XML-RPC: '.__METHOD__.': warning. Only Basic auth to proxy is supported with HTTP 1.0');
                }
                $proxy_credentials = 'Proxy-Authorization: Basic ' . base64_encode($proxyusername.':'.$proxypassword) . "\r\n";
            }
        }
        else
        {
            $connectserver = $server;
            $connectport = $port;
            $uri = $this->path;
        }

        // Cookie generation, as per rfc2965 (version 1 cookies) or
        // netscape's rules (version 0 cookies)
        $cookieheader='';
        if (count($this->cookies))
        {
            $version = '';
            foreach ($this->cookies as $name => $cookie)
            {
                if ($cookie['version'])
                {
                    $version = ' $Version="' . $cookie['version'] . '";';
                    $cookieheader .= ' ' . $name . '="' . $cookie['value'] . '";';
                    if ($cookie['path'])
                        $cookieheader .= ' $Path="' . $cookie['path'] . '";';
                    if ($cookie['domain'])
                        $cookieheader .= ' $Domain="' . $cookie['domain'] . '";';
                    if ($cookie['port'])
                        $cookieheader .= ' $Port="' . $cookie['port'] . '";';
                }
                else
                {
                    $cookieheader .= ' ' . $name . '=' . $cookie['value'] . ";";
                }
            }
            $cookieheader = 'Cookie:' . $version . substr($cookieheader, 0, -1) . "\r\n";
        }

        // omit port if 80
        $port = ($port == 80) ? '' : (':' . $port);

        $op= 'POST ' . $uri. " HTTP/1.0\r\n" .
            'User-Agent: ' . $this->user_agent . "\r\n" .
            'Host: '. $server . $port . "\r\n" .
            $credentials .
            $proxy_credentials .
            $accepted_encoding .
            $encoding_hdr .
            'Accept-Charset: ' . implode(',', $this->accepted_charset_encodings) . "\r\n" .
            $cookieheader .
            'Content-Type: ' . $msg->content_type . "\r\nContent-Length: " .
            strlen($payload) . "\r\n\r\n" .
            $payload;

        if($this->debug > 1)
        {
            print "<PRE>\n---SENDING---\n" . htmlentities($op) . "\n---END---\n</PRE>";
            // let the client see this now in case http times out...
            flush();
        }

        if($timeout>0)
        {
            $fp=@fsockopen($connectserver, $connectport, $this->errno, $this->errstr, $timeout);
        }
        else
        {
            $fp=@fsockopen($connectserver, $connectport, $this->errno, $this->errstr);
        }
        if($fp)
        {
            if($timeout>0 && function_exists('stream_set_timeout'))
            {
                stream_set_timeout($fp, $timeout);
            }
        }
        else
        {
            $this->errstr='Connect error: '.$this->errstr;
            $r=new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['http_error'], $this->errstr . ' (' . $this->errno . ')');
            return $r;
        }

        if(!fputs($fp, $op, strlen($op)))
        {
            fclose($fp);
            $this->errstr='Write error';
            $r=new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['http_error'], $this->errstr);
            return $r;
        }
        else
        {
            // reset errno and errstr on successful socket connection
            $this->errstr = '';
        }
        // G. Giunta 2005/10/24: close socket before parsing.
        // should yield slightly better execution times, and make easier recursive calls (e.g. to follow http redirects)
        $ipd='';
        do
        {
            // shall we check for $data === FALSE?
            // as per the manual, it signals an error
            $ipd.=fread($fp, 32768);
        } while(!feof($fp));
        fclose($fp);
        $r =& $msg->parseResponse($ipd, false, $this->return_type);
        return $r;

    }

    /**
     * @access private
     */
    function &sendPayloadHTTPS($msg, $server, $port, $timeout=0, $username='',
                               $password='', $authtype=1, $cert='',$certpass='', $cacert='', $cacertdir='',
                               $proxyhost='', $proxyport=0, $proxyusername='', $proxypassword='', $proxyauthtype=1,
                               $keepalive=false, $key='', $keypass='')
    {
        $r =& $this->sendPayloadCURL($msg, $server, $port, $timeout, $username,
            $password, $authtype, $cert, $certpass, $cacert, $cacertdir, $proxyhost, $proxyport,
            $proxyusername, $proxypassword, $proxyauthtype, 'https', $keepalive, $key, $keypass);
        return $r;
    }

    /**
     * Contributed by Justin Miller <justin@voxel.net>
     * Requires curl to be built into PHP
     * NB: CURL versions before 7.11.10 cannot use proxy to talk to https servers!
     * @access private
     */
    function &sendPayloadCURL($msg, $server, $port, $timeout=0, $username='',
                              $password='', $authtype=1, $cert='', $certpass='', $cacert='', $cacertdir='',
                              $proxyhost='', $proxyport=0, $proxyusername='', $proxypassword='', $proxyauthtype=1, $method='https',
                              $keepalive=false, $key='', $keypass='')
    {
        if(!function_exists('curl_init'))
        {
            $this->errstr='CURL unavailable on this install';
            $r=new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['no_curl'], $GLOBALS['xmlrpcstr']['no_curl']);
            return $r;
        }
        if($method == 'https')
        {
            if(($info = curl_version()) &&
                ((is_string($info) && strpos($info, 'OpenSSL') === null) || (is_array($info) && !isset($info['ssl_version']))))
            {
                $this->errstr='SSL unavailable on this install';
                $r=new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['no_ssl'], $GLOBALS['xmlrpcstr']['no_ssl']);
                return $r;
            }
        }

        if($port == 0)
        {
            if($method == 'http')
            {
                $port = 80;
            }
            else
            {
                $port = 443;
            }
        }

        // Only create the payload if it was not created previously
        if(empty($msg->payload))
        {
            $msg->createPayload($this->request_charset_encoding);
        }

        // Deflate request body and set appropriate request headers
        $payload = $msg->payload;
        if(function_exists('gzdeflate') && ($this->request_compression == 'gzip' || $this->request_compression == 'deflate'))
        {
            if($this->request_compression == 'gzip')
            {
                $a = @gzencode($payload);
                if($a)
                {
                    $payload = $a;
                    $encoding_hdr = 'Content-Encoding: gzip';
                }
            }
            else
            {
                $a = @gzcompress($payload);
                if($a)
                {
                    $payload = $a;
                    $encoding_hdr = 'Content-Encoding: deflate';
                }
            }
        }
        else
        {
            $encoding_hdr = '';
        }

        if($this->debug > 1)
        {
            print "<PRE>\n---SENDING---\n" . htmlentities($payload) . "\n---END---\n</PRE>";
            // let the client see this now in case http times out...
            flush();
        }

        if(!$keepalive || !$this->xmlrpc_curl_handle)
        {
            $curl = curl_init($method . '://' . $server . ':' . $port . $this->path . ($this->extraUrlParams != null ? '?' . http_build_query($this->extraUrlParams) : ''));
            if($keepalive)
            {
                $this->xmlrpc_curl_handle = $curl;
            }
        }
        else
        {
            $curl = $this->xmlrpc_curl_handle;
        }

        // results into variable
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

        if($this->debug)
        {
            curl_setopt($curl, CURLOPT_VERBOSE, 1);
        }
        curl_setopt($curl, CURLOPT_USERAGENT, $this->user_agent);
        // required for XMLRPC: post the data
        curl_setopt($curl, CURLOPT_POST, 1);
        // the data
        curl_setopt($curl, CURLOPT_POSTFIELDS, $payload);

        // return the header too
        curl_setopt($curl, CURLOPT_HEADER, 1);

        // NB: if we set an empty string, CURL will add http header indicating
        // ALL methods it is supporting. This is possibly a better option than
        // letting the user tell what curl can / cannot do...
        if(is_array($this->accepted_compression) && count($this->accepted_compression))
        {
            //curl_setopt($curl, CURLOPT_ENCODING, implode(',', $this->accepted_compression));
            // empty string means 'any supported by CURL' (shall we catch errors in case CURLOPT_SSLKEY undefined ?)
            if (count($this->accepted_compression) == 1)
            {
                curl_setopt($curl, CURLOPT_ENCODING, $this->accepted_compression[0]);
            }
            else
                curl_setopt($curl, CURLOPT_ENCODING, '');
        }
        // extra headers
        $headers = array('Content-Type: ' . $msg->content_type , 'Accept-Charset: ' . implode(',', $this->accepted_charset_encodings));
        // if no keepalive is wanted, let the server know it in advance
        if(!$keepalive)
        {
            $headers[] = 'Connection: close';
        }
        // request compression header
        if($encoding_hdr)
        {
            $headers[] = $encoding_hdr;
        }

        curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
        // timeout is borked
        if($timeout)
        {
            curl_setopt($curl, CURLOPT_TIMEOUT, $timeout == 1 ? 1 : $timeout - 1);
        }

        if($username && $password)
        {
            curl_setopt($curl, CURLOPT_USERPWD, $username.':'.$password);
            if (defined('CURLOPT_HTTPAUTH'))
            {
                curl_setopt($curl, CURLOPT_HTTPAUTH, $authtype);
            }
            else if ($authtype != 1)
            {
                error_log('XML-RPC: '.__METHOD__.': warning. Only Basic auth is supported by the current PHP/curl install');
            }
        }

        if($method == 'https')
        {
            // set cert file
            if($cert)
            {
                curl_setopt($curl, CURLOPT_SSLCERT, $cert);
            }
            // set cert password
            if($certpass)
            {
                curl_setopt($curl, CURLOPT_SSLCERTPASSWD, $certpass);
            }
            // whether to verify remote host's cert
            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, $this->verifypeer);
            // set ca certificates file/dir
            if($cacert)
            {
                curl_setopt($curl, CURLOPT_CAINFO, $cacert);
            }
            if($cacertdir)
            {
                curl_setopt($curl, CURLOPT_CAPATH, $cacertdir);
            }
            // set key file (shall we catch errors in case CURLOPT_SSLKEY undefined ?)
            if($key)
            {
                curl_setopt($curl, CURLOPT_SSLKEY, $key);
            }
            // set key password (shall we catch errors in case CURLOPT_SSLKEY undefined ?)
            if($keypass)
            {
                curl_setopt($curl, CURLOPT_SSLKEYPASSWD, $keypass);
            }
            // whether to verify cert's common name (CN); 0 for no, 1 to verify that it exists, and 2 to verify that it matches the hostname used
            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, $this->verifyhost);
        }

        // proxy info
        if($proxyhost)
        {
            if($proxyport == 0)
            {
                $proxyport = 8080; // NB: even for HTTPS, local connection is on port 8080
            }
            curl_setopt($curl, CURLOPT_PROXY, $proxyhost.':'.$proxyport);
            //curl_setopt($curl, CURLOPT_PROXYPORT,$proxyport);
            if($proxyusername)
            {
                curl_setopt($curl, CURLOPT_PROXYUSERPWD, $proxyusername.':'.$proxypassword);
                if (defined('CURLOPT_PROXYAUTH'))
                {
                    curl_setopt($curl, CURLOPT_PROXYAUTH, $proxyauthtype);
                }
                else if ($proxyauthtype != 1)
                {
                    error_log('XML-RPC: '.__METHOD__.': warning. Only Basic auth to proxy is supported by the current PHP/curl install');
                }
            }
        }

        // NB: should we build cookie http headers by hand rather than let CURL do it?
        // the following code does not honour 'expires', 'path' and 'domain' cookie attributes
        // set to client obj the the user...
        if (count($this->cookies))
        {
            $cookieheader = '';
            foreach ($this->cookies as $name => $cookie)
            {
                $cookieheader .= $name . '=' . $cookie['value'] . '; ';
            }
            curl_setopt($curl, CURLOPT_COOKIE, substr($cookieheader, 0, -2));
        }

        foreach ($this->extracurlopts as $opt => $val)
        {
            curl_setopt($curl, $opt, $val);
        }

        $result = curl_exec($curl);

        if ($this->debug > 1)
        {
            print "<PRE>\n---CURL INFO---\n";
            foreach(curl_getinfo($curl) as $name => $val)
            {
                if (is_array($val))
                {
                    $val = implode("\n", $val);
                }
                print $name . ': ' . htmlentities($val) . "\n";
            }

            print "---END---\n</PRE>";
        }

        $this->curlError = curl_error($curl);
        if ($this->curlError){
            $this->curlInfo = curl_getinfo($curl);
            $this->curlErrorNo = curl_errno($curl);
        }

        if(!$result) /// @todo we should use a better check here - what if we get back '' or '0'?
        {
            $this->errstr='no response';
            $resp=new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['curl_fail'], $GLOBALS['xmlrpcstr']['curl_fail']. ': '. curl_error($curl));
            curl_close($curl);
            if($keepalive)
            {
                $this->xmlrpc_curl_handle = null;
            }
        }
        else
        {
            if(!$keepalive)
            {
                curl_close($curl);
            }
            $resp =& $msg->parseResponse($result, true, $this->return_type);
            // if we got back a 302, we can not reuse the curl handle for later calls
            if($resp->faultCode() == $GLOBALS['xmlrpcerr']['http_error'] && $keepalive)
            {
                curl_close($curl);
                $this->xmlrpc_curl_handle = null;
            }
        }
        return $resp;
    }

    /**
     * Send an array of request messages and return an array of responses.
     * Unless $this->no_multicall has been set to true, it will try first
     * to use one single xmlrpc call to server method system.multicall, and
     * revert to sending many successive calls in case of failure.
     * This failure is also stored in $this->no_multicall for subsequent calls.
     * Unfortunately, there is no server error code universally used to denote
     * the fact that multicall is unsupported, so there is no way to reliably
     * distinguish between that and a temporary failure.
     * If you are sure that server supports multicall and do not want to
     * fallback to using many single calls, set the fourth parameter to FALSE.
     *
     * NB: trying to shoehorn extra functionality into existing syntax has resulted
     * in pretty much convoluted code...
     *
     * @param array $msgs an array of xmlrpcmsg objects
     * @param integer $timeout connection timeout (in seconds)
     * @param string $method the http protocol variant to be used
     * @param boolean fallback When true, upon receiving an error during multicall, multiple single calls will be attempted
     * @return array
     * @access public
     */
    function multicall($msgs, $timeout=0, $method='', $fallback=true)
    {
        if ($method == '')
        {
            $method = $this->method;
        }
        if(!$this->no_multicall)
        {
            $results = $this->_try_multicall($msgs, $timeout, $method);
            if(is_array($results))
            {
                // System.multicall succeeded
                return $results;
            }
            else
            {
                // either system.multicall is unsupported by server,
                // or call failed for some other reason.
                if ($fallback)
                {
                    // Don't try it next time...
                    $this->no_multicall = true;
                }
                else
                {
                    if (is_a($results, 'xmlrpcresp'))
                    {
                        $result = $results;
                    }
                    else
                    {
                        $result = new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['multicall_error'], $GLOBALS['xmlrpcstr']['multicall_error']);
                    }
                }
            }
        }
        else
        {
            // override fallback, in case careless user tries to do two
            // opposite things at the same time
            $fallback = true;
        }

        $results = array();
        if ($fallback)
        {
            // system.multicall is (probably) unsupported by server:
            // emulate multicall via multiple requests
            foreach($msgs as $msg)
            {
                $results[] =& $this->send($msg, $timeout, $method);
            }
        }
        else
        {
            // user does NOT want to fallback on many single calls:
            // since we should always return an array of responses,
            // return an array with the same error repeated n times
            foreach($msgs as $msg)
            {
                $results[] = $result;
            }
        }
        return $results;
    }

    /**
     * Attempt to boxcar $msgs via system.multicall.
     * Returns either an array of xmlrpcreponses, an xmlrpc error response
     * or false (when received response does not respect valid multicall syntax)
     * @access private
     */
    function _try_multicall($msgs, $timeout, $method)
    {
        // Construct multicall message
        $calls = array();
        foreach($msgs as $msg)
        {
            $call['methodName'] = new xmlrpcval($msg->method(),'string');
            $numParams = $msg->getNumParams();
            $params = array();
            for($i = 0; $i < $numParams; $i++)
            {
                $params[$i] = $msg->getParam($i);
            }
            $call['params'] = new xmlrpcval($params, 'array');
            $calls[] = new xmlrpcval($call, 'struct');
        }
        $multicall = new xmlrpcmsg('system.multicall');
        $multicall->addParam(new xmlrpcval($calls, 'array'));

        // Attempt RPC call
        $result =& $this->send($multicall, $timeout, $method);

        if($result->faultCode() != 0)
        {
            // call to system.multicall failed
            return $result;
        }

        // Unpack responses.
        $rets = $result->value();

        if ($this->return_type == 'xml')
        {
            return $rets;
        }
        else if ($this->return_type == 'phpvals')
        {
            ///@todo test this code branch...
            $rets = $result->value();
            if(!is_array($rets))
            {
                return false;		// bad return type from system.multicall
            }
            $numRets = count($rets);
            if($numRets != count($msgs))
            {
                return false;		// wrong number of return values.
            }

            $response = array();
            for($i = 0; $i < $numRets; $i++)
            {
                $val = $rets[$i];
                if (!is_array($val)) {
                    return false;
                }
                switch(count($val))
                {
                    case 1:
                        if(!isset($val[0]))
                        {
                            return false;		// Bad value
                        }
                        // Normal return value
                        $response[$i] = new xmlrpcresp($val[0], 0, '', 'phpvals');
                        break;
                    case 2:
                        ///	@todo remove usage of @: it is apparently quite slow
                        $code = @$val['faultCode'];
                        if(!is_int($code))
                        {
                            return false;
                        }
                        $str = @$val['faultString'];
                        if(!is_string($str))
                        {
                            return false;
                        }
                        $response[$i] = new xmlrpcresp(0, $code, $str);
                        break;
                    default:
                        return false;
                }
            }
            return $response;
        }
        else // return type == 'xmlrpcvals'
        {
            $rets = $result->value();
            if($rets->kindOf() != 'array')
            {
                return false;		// bad return type from system.multicall
            }
            $numRets = $rets->arraysize();
            if($numRets != count($msgs))
            {
                return false;		// wrong number of return values.
            }

            $response = array();
            for($i = 0; $i < $numRets; $i++)
            {
                $val = $rets->arraymem($i);
                switch($val->kindOf())
                {
                    case 'array':
                        if($val->arraysize() != 1)
                        {
                            return false;		// Bad value
                        }
                        // Normal return value
                        $response[$i] = new xmlrpcresp($val->arraymem(0));
                        break;
                    case 'struct':
                        $code = $val->structmem('faultCode');
                        if($code->kindOf() != 'scalar' || $code->scalartyp() != 'int')
                        {
                            return false;
                        }
                        $str = $val->structmem('faultString');
                        if($str->kindOf() != 'scalar' || $str->scalartyp() != 'string')
                        {
                            return false;
                        }
                        $response[$i] = new xmlrpcresp(0, $code->scalarval(), $str->scalarval());
                        break;
                    default:
                        return false;
                }
            }
            return $response;
        }
    }
} // end class xmlrpc_client

class xmlrpcresp
{
    var $val = 0;
    var $valtyp;
    var $errno = 0;
    var $errstr = '';
    var $payload;
    var $hdrs = array();
    var $_cookies = array();
    var $content_type = 'text/xml';
    var $raw_data = '';

    /**
     * @param mixed $val either an xmlrpcval obj, a php value or the xml serialization of an xmlrpcval (a string)
     * @param integer $fcode set it to anything but 0 to create an error response
     * @param string $fstr the error string, in case of an error response
     * @param string $valtyp either 'xmlrpcvals', 'phpvals' or 'xml'
     *
     * @todo add check that $val / $fcode / $fstr is of correct type???
     * NB: as of now we do not do it, since it might be either an xmlrpcval or a plain
     * php val, or a complete xml chunk, depending on usage of xmlrpc_client::send() inside which creator is called...
     */
    function __construct($val, $fcode = 0, $fstr = '', $valtyp='')
    {
        if($fcode != 0)
        {
            // error response
            $this->errno = $fcode;
            $this->errstr = $fstr;
            //$this->errstr = htmlspecialchars($fstr); // XXX: encoding probably shouldn't be done here; fix later.
        }
        else
        {
            // successful response
            $this->val = $val;
            if ($valtyp == '')
            {
                // user did not declare type of response value: try to guess it
                if (is_object($this->val) && is_a($this->val, 'xmlrpcval'))
                {
                    $this->valtyp = 'xmlrpcvals';
                }
                else if (is_string($this->val))
                {
                    $this->valtyp = 'xml';

                }
                else
                {
                    $this->valtyp = 'phpvals';
                }
            }
            else
            {
                // user declares type of resp value: believe him
                $this->valtyp = $valtyp;
            }
        }
    }

    /**
     * Returns the error code of the response.
     * @return integer the error code of this response (0 for not-error responses)
     * @access public
     */
    function faultCode()
    {
        return $this->errno;
    }

    /**
     * Returns the error code of the response.
     * @return string the error string of this response ('' for not-error responses)
     * @access public
     */
    function faultString()
    {
        return $this->errstr;
    }

    /**
     * Returns the value received by the server.
     * @return mixed the xmlrpcval object returned by the server. Might be an xml string or php value if the response has been created by specially configured xmlrpc_client objects
     * @access public
     */
    function value()
    {
        return $this->val;
    }

    /**
     * Returns an array with the cookies received from the server.
     * Array has the form: $cookiename => array ('value' => $val, $attr1 => $val1, $attr2 = $val2, ...)
     * with attributes being e.g. 'expires', 'path', domain'.
     * NB: cookies sent as 'expired' by the server (i.e. with an expiry date in the past)
     * are still present in the array. It is up to the user-defined code to decide
     * how to use the received cookies, and whether they have to be sent back with the next
     * request to the server (using xmlrpc_client::setCookie) or not
     * @return array array of cookies received from the server
     * @access public
     */
    function cookies()
    {
        return $this->_cookies;
    }

    /**
     * Returns xml representation of the response. XML prologue not included
     * @param string $charset_encoding the charset to be used for serialization. if null, US-ASCII is assumed
     * @return string the xml representation of the response
     * @access public
     */
    function serialize($charset_encoding='')
    {
        if ($charset_encoding != '')
            $this->content_type = 'text/xml; charset=' . $charset_encoding;
        else
            $this->content_type = 'text/xml';
        if ($GLOBALS['xmlrpc_null_apache_encoding'])
        {
            $result = "<methodResponse xmlns:ex=\"".$GLOBALS['xmlrpc_null_apache_encoding_ns']."\">\n";
        }
        else
        {
            $result = "<methodResponse>\n";
        }
        if($this->errno)
        {
            // G. Giunta 2005/2/13: let non-ASCII response messages be tolerated by clients
            // by xml-encoding non ascii chars
            $result .= "<fault>\n" .
                "<value>\n<struct><member><name>faultCode</name>\n<value><int>" . $this->errno .
                "</int></value>\n</member>\n<member>\n<name>faultString</name>\n<value><string>" .
                xmlrpc_encode_entitites($this->errstr, $GLOBALS['xmlrpc_internalencoding'], $charset_encoding) . "</string></value>\n</member>\n" .
                "</struct>\n</value>\n</fault>";
        }
        else
        {
            if(!is_object($this->val) || !is_a($this->val, 'xmlrpcval'))
            {
                if (is_string($this->val) && $this->valtyp == 'xml')
                {
                    $result .= "<params>\n<param>\n" .
                        $this->val .
                        "</param>\n</params>";
                }
                else
                {
                    /// @todo try to build something serializable?
                    die('cannot serialize xmlrpcresp objects whose content is native php values');
                }
            }
            else
            {
                $result .= "<params>\n<param>\n" .
                    $this->val->serialize($charset_encoding) .
                    "</param>\n</params>";
            }
        }
        $result .= "\n</methodResponse>";
        $this->payload = $result;
        return $result;
    }
}

class xmlrpcmsg
{
    var $payload;
    var $methodname;
    var $params=array();
    var $debug=0;
    var $content_type = 'text/xml';

    /**
     * @param string $meth the name of the method to invoke
     * @param array $pars array of parameters to be passed to the method (xmlrpcval objects)
     */
    function __construct($meth, $pars=0)
    {
        $this->methodname=$meth;
        if(is_array($pars) && count($pars)>0)
        {
            for($i=0; $i<count($pars); $i++)
            {
                $this->addParam($pars[$i]);
            }
        }
    }

    /**
     * @access private
     */
    function xml_header($charset_encoding='')
    {
        if ($charset_encoding != '')
        {
            return "<?xml version=\"1.0\" encoding=\"$charset_encoding\" ?" . ">\n<methodCall>\n";
        }
        else
        {
            return "<?xml version=\"1.0\"?" . ">\n<methodCall>\n";
        }
    }

    /**
     * @access private
     */
    function xml_footer()
    {
        return '</methodCall>';
    }

    /**
     * @access private
     */
    function kindOf()
    {
        return 'msg';
    }

    /**
     * @access private
     */
    function createPayload($charset_encoding='')
    {
        if ($charset_encoding != '')
            $this->content_type = 'text/xml; charset=' . $charset_encoding;
        else
            $this->content_type = 'text/xml';
        $this->payload=$this->xml_header($charset_encoding);
        $this->payload.='<methodName>' . $this->methodname . "</methodName>\n";
        $this->payload.="<params>\n";
        for($i=0; $i<count($this->params); $i++)
        {
            $p=$this->params[$i];
            $this->payload.="<param>\n" . $p->serialize($charset_encoding) .
                "</param>\n";
        }
        $this->payload.="</params>\n";
        $this->payload.=$this->xml_footer();
    }

    /**
     * Gets/sets the xmlrpc method to be invoked
     * @param string $meth the method to be set (leave empty not to set it)
     * @return string the method that will be invoked
     * @access public
     */
    function method($meth='')
    {
        if($meth!='')
        {
            $this->methodname=$meth;
        }
        return $this->methodname;
    }

    /**
     * Returns xml representation of the message. XML prologue included
     * @param string $charset_encoding
     * @return string the xml representation of the message, xml prologue included
     * @access public
     */
    function serialize($charset_encoding='')
    {
        $this->createPayload($charset_encoding);
        return $this->payload;
    }

    /**
     * Add a parameter to the list of parameters to be used upon method invocation
     * @param xmlrpcval $par
     * @return boolean false on failure
     * @access public
     */
    function addParam($par)
    {
        // add check: do not add to self params which are not xmlrpcvals
        if(is_object($par) && is_a($par, 'xmlrpcval'))
        {
            $this->params[]=$par;
            return true;
        }
        else
        {
            return false;
        }
    }

    /**
     * Returns the nth parameter in the message. The index zero-based.
     * @param integer $i the index of the parameter to fetch (zero based)
     * @return xmlrpcval the i-th parameter
     * @access public
     */
    function getParam($i) { return $this->params[$i]; }

    /**
     * Returns the number of parameters in the messge.
     * @return integer the number of parameters currently set
     * @access public
     */
    function getNumParams() { return count($this->params); }

    /**
     * Given an open file handle, read all data available and parse it as axmlrpc response.
     * NB: the file handle is not closed by this function.
     * NNB: might have trouble in rare cases to work on network streams, as we
     *      check for a read of 0 bytes instead of feof($fp).
     *      But since checking for feof(null) returns false, we would risk an
     *      infinite loop in that case, because we cannot trust the caller
     *      to give us a valid pointer to an open file...
     * @access public
     * @param resource $fp stream pointer
     * @return xmlrpcresp
     * @todo add 2nd & 3rd param to be passed to ParseResponse() ???
     */
    function &parseResponseFile($fp)
    {
        $ipd='';
        while($data=fread($fp, 32768))
        {
            $ipd.=$data;
        }
        //fclose($fp);
        $r =& $this->parseResponse($ipd);
        return $r;
    }

    /**
     * Parses HTTP headers and separates them from data.
     * @access private
     */
    function &parseResponseHeaders(&$data, $headers_processed=false)
    {
        // Support "web-proxy-tunelling" connections for https through proxies
        if(preg_match('/^HTTP\/1\.[0-1] 200 Connection established/', $data))
        {
            // Look for CR/LF or simple LF as line separator,
            // (even though it is not valid http)
            $pos = strpos($data,"\r\n\r\n");
            if($pos || is_int($pos))
            {
                $bd = $pos+4;
            }
            else
            {
                $pos = strpos($data,"\n\n");
                if($pos || is_int($pos))
                {
                    $bd = $pos+2;
                }
                else
                {
                    // No separation between response headers and body: fault?
                    $bd = 0;
                }
            }
            if ($bd)
            {
                // this filters out all http headers from proxy.
                // maybe we could take them into account, too?
                $data = substr($data, $bd);
            }
            else
            {
                error_log('XML-RPC: '.__METHOD__.': HTTPS via proxy error, tunnel connection possibly failed');
                $r=new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['http_error'], $GLOBALS['xmlrpcstr']['http_error']. ' (HTTPS via proxy error, tunnel connection possibly failed)');
                return $r;
            }
        }

        // Strip HTTP 1.1 100 Continue header if present
        while(preg_match('/^HTTP\/1\.1 1[0-9]{2} /', $data))
        {
            $pos = strpos($data, 'HTTP', 12);
            // server sent a Continue header without any (valid) content following...
            // give the client a chance to know it
            if(!$pos && !is_int($pos)) // works fine in php 3, 4 and 5
            {
                break;
            }
            $data = substr($data, $pos);
        }
        if(!preg_match('/^HTTP\/[0-9.]+ 200 /', $data))
        {
            $errstr= substr($data, 0, strpos($data, "\n")-1);
            error_log('XML-RPC: '.__METHOD__.': HTTP error, got response: ' .$errstr);
            $r=new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['http_error'], $GLOBALS['xmlrpcstr']['http_error']. ' (' . $errstr . ')');
            return $r;
        }

        $GLOBALS['_xh']['headers'] = array();
        $GLOBALS['_xh']['cookies'] = array();

        // be tolerant to usage of \n instead of \r\n to separate headers and data
        // (even though it is not valid http)
        $pos = strpos($data,"\r\n\r\n");
        if($pos || is_int($pos))
        {
            $bd = $pos+4;
        }
        else
        {
            $pos = strpos($data,"\n\n");
            if($pos || is_int($pos))
            {
                $bd = $pos+2;
            }
            else
            {
                // No separation between response headers and body: fault?
                // we could take some action here instead of going on...
                $bd = 0;
            }
        }
        // be tolerant to line endings, and extra empty lines
        $ar = preg_split("/\r?\n/", trim(substr($data, 0, $pos)));
        while(list(,$line) = @each($ar))
        {
            // take care of multi-line headers and cookies
            $arr = explode(':',$line,2);
            if(count($arr) > 1)
            {
                $header_name = strtolower(trim($arr[0]));
                /// @todo some other headers (the ones that allow a CSV list of values)
                /// do allow many values to be passed using multiple header lines.
                /// We should add content to $GLOBALS['_xh']['headers'][$header_name]
                /// instead of replacing it for those...
                if ($header_name == 'set-cookie' || $header_name == 'set-cookie2')
                {
                    if ($header_name == 'set-cookie2')
                    {
                        // version 2 cookies:
                        // there could be many cookies on one line, comma separated
                        $cookies = explode(',', $arr[1]);
                    }
                    else
                    {
                        $cookies = array($arr[1]);
                    }
                    foreach ($cookies as $cookie)
                    {
                        // glue together all received cookies, using a comma to separate them
                        // (same as php does with getallheaders())
                        if (isset($GLOBALS['_xh']['headers'][$header_name]))
                            $GLOBALS['_xh']['headers'][$header_name] .= ', ' . trim($cookie);
                        else
                            $GLOBALS['_xh']['headers'][$header_name] = trim($cookie);
                        // parse cookie attributes, in case user wants to correctly honour them
                        // feature creep: only allow rfc-compliant cookie attributes?
                        // @todo support for server sending multiple time cookie with same name, but using different PATHs
                        $cookie = explode(';', $cookie);
                        foreach ($cookie as $pos => $val)
                        {
                            $val = explode('=', $val, 2);
                            $tag = trim($val[0]);
                            $val = trim(@$val[1]);
                            /// @todo with version 1 cookies, we should strip leading and trailing " chars
                            if ($pos == 0)
                            {
                                $cookiename = $tag;
                                $GLOBALS['_xh']['cookies'][$tag] = array();
                                $GLOBALS['_xh']['cookies'][$cookiename]['value'] = urldecode($val);
                            }
                            else
                            {
                                if ($tag != 'value')
                                {
                                    $GLOBALS['_xh']['cookies'][$cookiename][$tag] = $val;
                                }
                            }
                        }
                    }
                }
                else
                {
                    $GLOBALS['_xh']['headers'][$header_name] = trim($arr[1]);
                }
            }
            elseif(isset($header_name))
            {
                ///	@todo version1 cookies might span multiple lines, thus breaking the parsing above
                $GLOBALS['_xh']['headers'][$header_name] .= ' ' . trim($line);
            }
        }

        $data = substr($data, $bd);

        if($this->debug && count($GLOBALS['_xh']['headers']))
        {
            print '<PRE>';
            foreach($GLOBALS['_xh']['headers'] as $header => $value)
            {
                print htmlentities("HEADER: $header: $value\n");
            }
            foreach($GLOBALS['_xh']['cookies'] as $header => $value)
            {
                print htmlentities("COOKIE: $header={$value['value']}\n");
            }
            print "</PRE>\n";
        }

        // if CURL was used for the call, http headers have been processed,
        // and dechunking + reinflating have been carried out
        if(!$headers_processed)
        {
            // Decode chunked encoding sent by http 1.1 servers
            if(isset($GLOBALS['_xh']['headers']['transfer-encoding']) && $GLOBALS['_xh']['headers']['transfer-encoding'] == 'chunked')
            {
                if(!$data = decode_chunked($data))
                {
                    error_log('XML-RPC: '.__METHOD__.': errors occurred when trying to rebuild the chunked data received from server');
                    $r = new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['dechunk_fail'], $GLOBALS['xmlrpcstr']['dechunk_fail']);
                    return $r;
                }
            }

            // Decode gzip-compressed stuff
            // code shamelessly inspired from nusoap library by Dietrich Ayala
            if(isset($GLOBALS['_xh']['headers']['content-encoding']))
            {
                $GLOBALS['_xh']['headers']['content-encoding'] = str_replace('x-', '', $GLOBALS['_xh']['headers']['content-encoding']);
                if($GLOBALS['_xh']['headers']['content-encoding'] == 'deflate' || $GLOBALS['_xh']['headers']['content-encoding'] == 'gzip')
                {
                    // if decoding works, use it. else assume data wasn't gzencoded
                    if(function_exists('gzinflate'))
                    {
                        if($GLOBALS['_xh']['headers']['content-encoding'] == 'deflate' && $degzdata = @gzuncompress($data))
                        {
                            $data = $degzdata;
                            if($this->debug)
                                print "<PRE>---INFLATED RESPONSE---[".strlen($data)." chars]---\n" . htmlentities($data) . "\n---END---</PRE>";
                        }
                        elseif($GLOBALS['_xh']['headers']['content-encoding'] == 'gzip' && $degzdata = @gzinflate(substr($data, 10)))
                        {
                            $data = $degzdata;
                            if($this->debug)
                                print "<PRE>---INFLATED RESPONSE---[".strlen($data)." chars]---\n" . htmlentities($data) . "\n---END---</PRE>";
                        }
                        else
                        {
                            error_log('XML-RPC: '.__METHOD__.': errors occurred when trying to decode the deflated data received from server');
                            $r = new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['decompress_fail'], $GLOBALS['xmlrpcstr']['decompress_fail']);
                            return $r;
                        }
                    }
                    else
                    {
                        error_log('XML-RPC: '.__METHOD__.': the server sent deflated data. Your php install must have the Zlib extension compiled in to support this.');
                        $r = new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['cannot_decompress'], $GLOBALS['xmlrpcstr']['cannot_decompress']);
                        return $r;
                    }
                }
            }
        } // end of 'if needed, de-chunk, re-inflate response'

        // real stupid hack to avoid PHP complaining about returning NULL by ref
        $r = null;
        $r =& $r;
        return $r;
    }

    /**
     * Parse the xmlrpc response contained in the string $data and return an xmlrpcresp object.
     * @param string $data the xmlrpc response, eventually including http headers
     * @param bool $headers_processed when true prevents parsing HTTP headers for interpretation of content-encoding and consequent decoding
     * @param string $return_type decides return type, i.e. content of response->value(). Either 'xmlrpcvals', 'xml' or 'phpvals'
     * @return xmlrpcresp
     * @access public
     */
    function &parseResponse($data='', $headers_processed=false, $return_type='xmlrpcvals')
    {
        if($this->debug)
        {
            //by maHo, replaced htmlspecialchars with htmlentities
            print "<PRE>---GOT---\n" . htmlentities($data) . "\n---END---\n</PRE>";
        }

        if($data == '')
        {
            error_log('XML-RPC: '.__METHOD__.': no response received from server.');
            $r = new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['no_data'], $GLOBALS['xmlrpcstr']['no_data']);
            return $r;
        }

        $GLOBALS['_xh']=array();

        $raw_data = $data;
        // parse the HTTP headers of the response, if present, and separate them from data
        if(substr($data, 0, 4) == 'HTTP')
        {
            $r =& $this->parseResponseHeaders($data, $headers_processed);
            if ($r)
            {
                // failed processing of HTTP response headers
                // save into response obj the full payload received, for debugging
                $r->raw_data = $data;
                return $r;
            }
        }
        else
        {
            $GLOBALS['_xh']['headers'] = array();
            $GLOBALS['_xh']['cookies'] = array();
        }

        if($this->debug)
        {
            $start = strpos($data, '<!-- SERVER DEBUG INFO (BASE64 ENCODED):');
            if ($start)
            {
                $start += strlen('<!-- SERVER DEBUG INFO (BASE64 ENCODED):');
                $end = strpos($data, '-->', $start);
                $comments = substr($data, $start, $end-$start);
                print "<PRE>---SERVER DEBUG INFO (DECODED) ---\n\t".htmlentities(str_replace("\n", "\n\t", base64_decode($comments)))."\n---END---\n</PRE>";
            }
        }

        // be tolerant of extra whitespace in response body
        $data = trim($data);

        /// @todo return an error msg if $data=='' ?

        // be tolerant of junk after methodResponse (e.g. javascript ads automatically inserted by free hosts)
        // idea from Luca Mariano <luca.mariano@email.it> originally in PEARified version of the lib
        $pos = strrpos($data, '</methodResponse>');
        if($pos !== false)
        {
            $data = substr($data, 0, $pos+17);
        }

        // if user wants back raw xml, give it to him
        if ($return_type == 'xml')
        {
            $r = new xmlrpcresp($data, 0, '', 'xml');
            $r->hdrs = $GLOBALS['_xh']['headers'];
            $r->_cookies = $GLOBALS['_xh']['cookies'];
            $r->raw_data = $raw_data;
            return $r;
        }

        // try to 'guestimate' the character encoding of the received response
        $resp_encoding = guess_encoding(@$GLOBALS['_xh']['headers']['content-type'], $data);

        $GLOBALS['_xh']['ac']='';
        //$GLOBALS['_xh']['qt']=''; //unused...
        $GLOBALS['_xh']['stack'] = array();
        $GLOBALS['_xh']['valuestack'] = array();
        $GLOBALS['_xh']['isf']=0; // 0 = OK, 1 for xmlrpc fault responses, 2 = invalid xmlrpc
        $GLOBALS['_xh']['isf_reason']='';
        $GLOBALS['_xh']['rt']=''; // 'methodcall or 'methodresponse'

        // if response charset encoding is not known / supported, try to use
        // the default encoding and parse the xml anyway, but log a warning...
        if (!in_array($resp_encoding, array('UTF-8', 'ISO-8859-1', 'US-ASCII')))
            // the following code might be better for mb_string enabled installs, but
            // makes the lib about 200% slower...
            //if (!is_valid_charset($resp_encoding, array('UTF-8', 'ISO-8859-1', 'US-ASCII')))
        {
            error_log('XML-RPC: '.__METHOD__.': invalid charset encoding of received response: '.$resp_encoding);
            $resp_encoding = $GLOBALS['xmlrpc_defencoding'];
        }
        $parser = xml_parser_create($resp_encoding);
        xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, true);
        // G. Giunta 2005/02/13: PHP internally uses ISO-8859-1, so we have to tell
        // the xml parser to give us back data in the expected charset.
        // What if internal encoding is not in one of the 3 allowed?
        // we use the broadest one, ie. utf8
        // This allows to send data which is native in various charset,
        // by extending xmlrpc_encode_entitites() and setting xmlrpc_internalencoding
        if (!in_array($GLOBALS['xmlrpc_internalencoding'], array('UTF-8', 'ISO-8859-1', 'US-ASCII')))
        {
            xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, 'UTF-8');
        }
        else
        {
            xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, $GLOBALS['xmlrpc_internalencoding']);
        }

        if ($return_type == 'phpvals')
        {
            xml_set_element_handler($parser, 'xmlrpc_se', 'xmlrpc_ee_fast');
        }
        else
        {
            xml_set_element_handler($parser, 'xmlrpc_se', 'xmlrpc_ee');
        }

        xml_set_character_data_handler($parser, 'xmlrpc_cd');
        xml_set_default_handler($parser, 'xmlrpc_dh');

        // **BEGIN JORDAN NOVAK EDIT**
        // Sometimes customer data has these random characters in it, and it breaks the XML parsing
//            $test = preg_match('/\&#[0-9]{1,3}/', $data, $matches);
        $data = preg_replace(array('/\&#[0-9]{1,4}(?![0-9]{0,3};)/'),'', $data);
        $data = str_replace(array("&#11;", "&#0;", "&#20;", "&#12", "&#7;", "&#6;", "&#3;"), "", $data);
        // **END JORDAN NOVAK EDIT**


        // first error check: xml not well formed
        if(!xml_parse($parser, $data, count($data)))
        {
            try{
                $bad_return = fopen("bad_return.xml.php", "w");
                fwrite($bad_return, $data);
                fclose($bad_return);
            } catch(Exception $e){}
            // thanks to Peter Kocks <peter.kocks@baygate.com>
//				if((xml_get_current_line_number($parser)) == 1)
//				{
//					$errstr = 'XML error at line 1, check URL';
//				}
//				else
//				{
            $errstr = sprintf('XML error: %s at line %d, column %d, byte %d, text in context: %s',
                xml_error_string(xml_get_error_code($parser)),
                xml_get_current_line_number($parser), xml_get_current_column_number($parser), xml_get_current_byte_index($parser),
                substr($data, (xml_get_current_byte_index($parser) - 100), 200)
            );
//				}
            error_log($errstr);
            $r=new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['invalid_return'], $GLOBALS['xmlrpcstr']['invalid_return'].' ('.$errstr.')');
            xml_parser_free($parser);
            if($this->debug)
            {
                print $errstr;
            }
            $r->hdrs = $GLOBALS['_xh']['headers'];
            $r->_cookies = $GLOBALS['_xh']['cookies'];
            $r->raw_data = $raw_data;
            return $r;
        }
        xml_parser_free($parser);
        // second error check: xml well formed but not xml-rpc compliant
        if ($GLOBALS['_xh']['isf'] > 1)
        {
            if ($this->debug)
            {
                /// @todo echo something for user?
            }

            $r = new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['invalid_return'],
                $GLOBALS['xmlrpcstr']['invalid_return'] . ' ' . $GLOBALS['_xh']['isf_reason']);
        }
        // third error check: parsing of the response has somehow gone boink.
        // NB: shall we omit this check, since we trust the parsing code?
        elseif ($return_type == 'xmlrpcvals' && !is_object($GLOBALS['_xh']['value']))
        {
            // something odd has happened
            // and it's time to generate a client side error
            // indicating something odd went on
            $r=new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['invalid_return'],
                $GLOBALS['xmlrpcstr']['invalid_return']);
        }
        else
        {
            if ($this->debug)
            {
                print "<PRE>---PARSED---\n";
                // somehow htmlentities chokes on var_export, and some full html string...
                //print htmlentitites(var_export($GLOBALS['_xh']['value'], true));
                print htmlspecialchars(var_export($GLOBALS['_xh']['value'], true));
                print "\n---END---</PRE>";
            }

            // note that using =& will raise an error if $GLOBALS['_xh']['st'] does not generate an object.
            $v =& $GLOBALS['_xh']['value'];

            if($GLOBALS['_xh']['isf'])
            {
                /// @todo we should test here if server sent an int and a string,
                /// and/or coerce them into such...
                if ($return_type == 'xmlrpcvals')
                {
                    $errno_v = $v->structmem('faultCode');
                    $errstr_v = $v->structmem('faultString');
                    $errno = $errno_v->scalarval();
                    $errstr = $errstr_v->scalarval();
                }
                else
                {
                    $errno = $v['faultCode'];
                    $errstr = $v['faultString'];
                }

                if($errno == 0)
                {
                    // FAULT returned, errno needs to reflect that
                    $errno = -1;
                }

                $r = new xmlrpcresp(0, $errno, $errstr);
            }
            else
            {
                $r=new xmlrpcresp($v, 0, '', $return_type);
            }
        }

        $r->hdrs = $GLOBALS['_xh']['headers'];
        $r->_cookies = $GLOBALS['_xh']['cookies'];
        $r->raw_data = $raw_data;
        return $r;
    }
}

class xmlrpcval
{
    var $me=array();
    var $mytype=0;
    var $_php_class=null;

    /**
     * @param mixed $val
     * @param string $type any valid xmlrpc type name (lowercase). If null, 'string' is assumed
     */
    function __construct($val=-1, $type='')
    {
        /// @todo: optimization creep - do not call addXX, do it all inline.
        /// downside: booleans will not be coerced anymore
        if($val!==-1 || $type!='')
        {
            // optimization creep: inlined all work done by constructor
            switch($type)
            {
                case '':
                    $this->mytype=1;
                    $this->me['string']=$val;
                    break;
                case 'i4':
                case 'int':
                case 'double':
                case 'string':
                case 'boolean':
                case 'dateTime.iso8601':
                case 'base64':
                case 'null':
                    $this->mytype=1;
                    $this->me[$type]=$val;
                    break;
                case 'array':
                    $this->mytype=2;
                    $this->me['array']=$val;
                    break;
                case 'struct':
                    $this->mytype=3;
                    $this->me['struct']=$val;
                    break;
                default:
                    error_log("XML-RPC: ".__METHOD__.": not a known type ($type)");
            }
            /*if($type=='')
            {
                $type='string';
            }
            if($GLOBALS['xmlrpcTypes'][$type]==1)
            {
                $this->addScalar($val,$type);
            }
            elseif($GLOBALS['xmlrpcTypes'][$type]==2)
            {
                $this->addArray($val);
            }
            elseif($GLOBALS['xmlrpcTypes'][$type]==3)
            {
                $this->addStruct($val);
            }*/
        }
    }

    /**
     * Add a single php value to an (unitialized) xmlrpcval
     * @param mixed $val
     * @param string $type
     * @return int 1 or 0 on failure
     */
    function addScalar($val, $type='string')
    {
        $typeof=@$GLOBALS['xmlrpcTypes'][$type];
        if($typeof!=1)
        {
            error_log("XML-RPC: ".__METHOD__.": not a scalar type ($type)");
            return 0;
        }

        // coerce booleans into correct values
        // NB: we should either do it for datetimes, integers and doubles, too,
        // or just plain remove this check, implemented on booleans only...
        if($type==$GLOBALS['xmlrpcBoolean'])
        {
            if(strcasecmp($val,'true')==0 || $val==1 || ($val==true && strcasecmp($val,'false')))
            {
                $val=true;
            }
            else
            {
                $val=false;
            }
        }

        switch($this->mytype)
        {
            case 1:
                error_log('XML-RPC: '.__METHOD__.': scalar xmlrpcval can have only one value');
                return 0;
            case 3:
                error_log('XML-RPC: '.__METHOD__.': cannot add anonymous scalar to struct xmlrpcval');
                return 0;
            case 2:
                // we're adding a scalar value to an array here
                //$ar=$this->me['array'];
                //$ar[]=new xmlrpcval($val, $type);
                //$this->me['array']=$ar;
                // Faster (?) avoid all the costly array-copy-by-val done here...
                $this->me['array'][]=new xmlrpcval($val, $type);
                return 1;
            default:
                // a scalar, so set the value and remember we're scalar
                $this->me[$type]=$val;
                $this->mytype=$typeof;
                return 1;
        }
    }

    /**
     * Add an array of xmlrpcval objects to an xmlrpcval
     * @param array $vals
     * @return int 1 or 0 on failure
     * @access public
     *
     * @todo add some checking for $vals to be an array of xmlrpcvals?
     */
    function addArray($vals)
    {
        if($this->mytype==0)
        {
            $this->mytype=$GLOBALS['xmlrpcTypes']['array'];
            $this->me['array']=$vals;
            return 1;
        }
        elseif($this->mytype==2)
        {
            // we're adding to an array here
            $this->me['array'] = array_merge($this->me['array'], $vals);
            return 1;
        }
        else
        {
            error_log('XML-RPC: '.__METHOD__.': already initialized as a [' . $this->kindOf() . ']');
            return 0;
        }
    }

    /**
     * Add an array of named xmlrpcval objects to an xmlrpcval
     * @param array $vals
     * @return int 1 or 0 on failure
     * @access public
     *
     * @todo add some checking for $vals to be an array?
     */
    function addStruct($vals)
    {
        if($this->mytype==0)
        {
            $this->mytype=$GLOBALS['xmlrpcTypes']['struct'];
            $this->me['struct']=$vals;
            return 1;
        }
        elseif($this->mytype==3)
        {
            // we're adding to a struct here
            $this->me['struct'] = array_merge($this->me['struct'], $vals);
            return 1;
        }
        else
        {
            error_log('XML-RPC: '.__METHOD__.': already initialized as a [' . $this->kindOf() . ']');
            return 0;
        }
    }

    // poor man's version of print_r ???
    // DEPRECATED!
    function dump($ar)
    {
        foreach($ar as $key => $val)
        {
            echo "$key => $val<br />";
            if($key == 'array')
            {
                while(list($key2, $val2) = each($val))
                {
                    echo "-- $key2 => $val2<br />";
                }
            }
        }
    }

    /**
     * Returns a string containing "struct", "array" or "scalar" describing the base type of the value
     * @return string
     * @access public
     */
    function kindOf()
    {
        switch($this->mytype)
        {
            case 3:
                return 'struct';
                break;
            case 2:
                return 'array';
                break;
            case 1:
                return 'scalar';
                break;
            default:
                return 'undef';
        }
    }

    /**
     * @access private
     */
    function serializedata($typ, $val, $charset_encoding='')
    {
        $rs='';
        switch(@$GLOBALS['xmlrpcTypes'][$typ])
        {
            case 1:
                switch($typ)
                {
                    case $GLOBALS['xmlrpcBase64']:
                        $rs.="<${typ}>" . base64_encode($val) . "</${typ}>";
                        break;
                    case $GLOBALS['xmlrpcBoolean']:
                        $rs.="<${typ}>" . ($val ? '1' : '0') . "</${typ}>";
                        break;
                    case $GLOBALS['xmlrpcString']:
                        // G. Giunta 2005/2/13: do NOT use htmlentities, since
                        // it will produce named html entities, which are invalid xml
                        $rs.="<${typ}>" . xmlrpc_encode_entitites($val, $GLOBALS['xmlrpc_internalencoding'], $charset_encoding). "</${typ}>";
                        break;
                    case $GLOBALS['xmlrpcInt']:
                    case $GLOBALS['xmlrpcI4']:
                        $rs.="<${typ}>".(int)$val."</${typ}>";
                        break;
                    case $GLOBALS['xmlrpcDouble']:
                        // avoid using standard conversion of float to string because it is locale-dependent,
                        // and also because the xmlrpc spec forbids exponential notation.
                        // sprintf('%F') could be most likely ok but it fails eg. on 2e-14.
                        // The code below tries its best at keeping max precision while avoiding exp notation,
                        // but there is of course no limit in the number of decimal places to be used...
                        $rs.="<${typ}>".preg_replace('/\\.?0+$/','',number_format((double)$val, 128, '.', ''))."</${typ}>";
                        break;
                    case $GLOBALS['xmlrpcDateTime']:
                        if (is_string($val))
                        {
                            $rs.="<${typ}>${val}</${typ}>";
                        }
                        else if(is_a($val, 'DateTime'))
                        {
                            $rs.="<${typ}>".$val->format('Ymd\TH:i:s')."</${typ}>";
                        }
                        else if(is_int($val))
                        {
                            $rs.="<${typ}>".strftime("%Y%m%dT%H:%M:%S", $val)."</${typ}>";
                        }
                        else
                        {
                            // not really a good idea here: but what shall we output anyway? left for backward compat...
                            $rs.="<${typ}>${val}</${typ}>";
                        }
                        break;
                    case $GLOBALS['xmlrpcNull']:
                        if ($GLOBALS['xmlrpc_null_apache_encoding'])
                        {
                            $rs.="<ex:nil/>";
                        }
                        else
                        {
                            $rs.="<nil/>";
                        }
                        break;
                    default:
                        // no standard type value should arrive here, but provide a possibility
                        // for xmlrpcvals of unknown type...
                        $rs.="<${typ}>${val}</${typ}>";
                }
                break;
            case 3:
                // struct
                if ($this->_php_class)
                {
                    $rs.='<struct php_class="' . $this->_php_class . "\">\n";
                }
                else
                {
                    $rs.="<struct>\n";
                }
                foreach($val as $key2 => $val2)
                {
                    $rs.='<member><name>'.xmlrpc_encode_entitites($key2, $GLOBALS['xmlrpc_internalencoding'], $charset_encoding)."</name>\n";
                    //$rs.=$this->serializeval($val2);
                    $rs.=$val2->serialize($charset_encoding);
                    $rs.="</member>\n";
                }
                $rs.='</struct>';
                break;
            case 2:
                // array
                $rs.="<array>\n<data>\n";
                for($i=0; $i<count($val); $i++)
                {
                    //$rs.=$this->serializeval($val[$i]);
                    $rs.=$val[$i]->serialize($charset_encoding);
                }
                $rs.="</data>\n</array>";
                break;
            default:
                break;
        }
        return $rs;
    }

    /**
     * Returns xml representation of the value. XML prologue not included
     * @param string $charset_encoding the charset to be used for serialization. if null, US-ASCII is assumed
     * @return string
     * @access public
     */
    function serialize($charset_encoding='')
    {
        // add check? slower, but helps to avoid recursion in serializing broken xmlrpcvals...
        //if (is_object($o) && (get_class($o) == 'xmlrpcval' || is_subclass_of($o, 'xmlrpcval')))
        //{
        reset($this->me);
        list($typ, $val) = each($this->me);
        return '<value>' . $this->serializedata($typ, $val, $charset_encoding) . "</value>\n";
        //}
    }

    // DEPRECATED
    function serializeval($o)
    {
        // add check? slower, but helps to avoid recursion in serializing broken xmlrpcvals...
        //if (is_object($o) && (get_class($o) == 'xmlrpcval' || is_subclass_of($o, 'xmlrpcval')))
        //{
        $ar=$o->me;
        reset($ar);
        list($typ, $val) = each($ar);
        return '<value>' . $this->serializedata($typ, $val) . "</value>\n";
        //}
    }

    /**
     * Checks whether a struct member with a given name is present.
     * Works only on xmlrpcvals of type struct.
     * @param string $m the name of the struct member to be looked up
     * @return boolean
     * @access public
     */
    function structmemexists($m)
    {
        return array_key_exists($m, $this->me['struct']);
    }

    /**
     * Returns the value of a given struct member (an xmlrpcval object in itself).
     * Will raise a php warning if struct member of given name does not exist
     * @param string $m the name of the struct member to be looked up
     * @return xmlrpcval
     * @access public
     */
    function structmem($m)
    {
        return $this->me['struct'][$m];
    }

    /**
     * Reset internal pointer for xmlrpcvals of type struct.
     * @access public
     */
    function structreset()
    {
        reset($this->me['struct']);
    }

    /**
     * Return next member element for xmlrpcvals of type struct.
     * @return xmlrpcval
     * @access public
     */
    function structeach()
    {
        return each($this->me['struct']);
    }

    // DEPRECATED! this code looks like it is very fragile and has not been fixed
    // for a long long time. Shall we remove it for 2.0?
    function getval()
    {
        // UNSTABLE
        reset($this->me);
        list($a,$b)=each($this->me);
        // contributed by I Sofer, 2001-03-24
        // add support for nested arrays to scalarval
        // i've created a new method here, so as to
        // preserve back compatibility

        if(is_array($b))
        {
            @reset($b);
            while(list($id,$cont) = @each($b))
            {
                $b[$id] = $cont->scalarval();
            }
        }

        // add support for structures directly encoding php objects
        if(is_object($b))
        {
            $t = get_object_vars($b);
            @reset($t);
            while(list($id,$cont) = @each($t))
            {
                $t[$id] = $cont->scalarval();
            }
            @reset($t);
            while(list($id,$cont) = @each($t))
            {
                @$b->$id = $cont;
            }
        }
        // end contrib
        return $b;
    }

    /**
     * Returns the value of a scalar xmlrpcval
     * @return mixed
     * @access public
     */
    function scalarval()
    {
        reset($this->me);
        list(,$b)=each($this->me);
        return $b;
    }

    /**
     * Returns the type of the xmlrpcval.
     * For integers, 'int' is always returned in place of 'i4'
     * @return string
     * @access public
     */
    function scalartyp()
    {
        reset($this->me);
        list($a,)=each($this->me);
        if($a==$GLOBALS['xmlrpcI4'])
        {
            $a=$GLOBALS['xmlrpcInt'];
        }
        return $a;
    }

    /**
     * Returns the m-th member of an xmlrpcval of struct type
     * @param integer $m the index of the value to be retrieved (zero based)
     * @return xmlrpcval
     * @access public
     */
    function arraymem($m)
    {
        return $this->me['array'][$m];
    }

    /**
     * Returns the number of members in an xmlrpcval of array type
     * @return integer
     * @access public
     */
    function arraysize()
    {
        return count($this->me['array']);
    }

    /**
     * Returns the number of members in an xmlrpcval of struct type
     * @return integer
     * @access public
     */
    function structsize()
    {
        return count($this->me['struct']);
    }
}


// date helpers

/**
 * Given a timestamp, return the corresponding ISO8601 encoded string.
 *
 * Really, timezones ought to be supported
 * but the XML-RPC spec says:
 *
 * "Don't assume a timezone. It should be specified by the server in its
 * documentation what assumptions it makes about timezones."
 *
 * These routines always assume localtime unless
 * $utc is set to 1, in which case UTC is assumed
 * and an adjustment for locale is made when encoding
 *
 * @param int $timet (timestamp)
 * @param int $utc (0 or 1)
 * @return string
 */
function iso8601_encode($timet, $utc=0)
{
    if(!$utc)
    {
        $t=strftime("%Y%m%dT%H:%M:%S", $timet);
    }
    else
    {
        if(function_exists('gmstrftime'))
        {
            // gmstrftime doesn't exist in some versions
            // of PHP
            $t=gmstrftime("%Y%m%dT%H:%M:%S", $timet);
        }
        else
        {
            $t=strftime("%Y%m%dT%H:%M:%S", $timet-date('Z'));
        }
    }
    return $t;
}

/**
 * Given an ISO8601 date string, return a timet in the localtime, or UTC
 * @param string $idate
 * @param int $utc either 0 or 1
 * @return int (datetime)
 */
function iso8601_decode($idate, $utc=0)
{
    $t=0;
    if(preg_match('/([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})/', $idate, $regs))
    {
        if($utc)
        {
            $t=gmmktime($regs[4], $regs[5], $regs[6], $regs[2], $regs[3], $regs[1]);
        }
        else
        {
            $t=mktime($regs[4], $regs[5], $regs[6], $regs[2], $regs[3], $regs[1]);
        }
    }
    return $t;
}

/**
 * Takes an xmlrpc value in PHP xmlrpcval object format and translates it into native PHP types.
 *
 * Works with xmlrpc message objects as input, too.
 *
 * Given proper options parameter, can rebuild generic php object instances
 * (provided those have been encoded to xmlrpc format using a corresponding
 * option in php_xmlrpc_encode())
 * PLEASE NOTE that rebuilding php objects involves calling their constructor function.
 * This means that the remote communication end can decide which php code will
 * get executed on your server, leaving the door possibly open to 'php-injection'
 * style of attacks (provided you have some classes defined on your server that
 * might wreak havoc if instances are built outside an appropriate context).
 * Make sure you trust the remote server/client before eanbling this!
 *
 * @author Dan Libby (dan@libby.com)
 *
 * @param xmlrpcval $xmlrpc_val
 * @param array $options if 'decode_php_objs' is set in the options array, xmlrpc structs can be decoded into php objects; if 'dates_as_objects' is set xmlrpc datetimes are decoded as php DateTime objects (standard is
 * @return mixed
 */
function php_xmlrpc_decode($xmlrpc_val, $options=array())
{
    switch($xmlrpc_val->kindOf())
    {
        case 'scalar':
            if (in_array('extension_api', $options))
            {
                reset($xmlrpc_val->me);
                list($typ,$val) = each($xmlrpc_val->me);
                switch ($typ)
                {
                    case 'dateTime.iso8601':
                        $xmlrpc_val->scalar = $val;
                        $xmlrpc_val->xmlrpc_type = 'datetime';
                        $xmlrpc_val->timestamp = iso8601_decode($val);
                        return $xmlrpc_val;
                    case 'base64':
                        $xmlrpc_val->scalar = $val;
                        $xmlrpc_val->type = $typ;
                        return $xmlrpc_val;
                    default:
                        return $xmlrpc_val->scalarval();
                }
            }
            if (in_array('dates_as_objects', $options) && $xmlrpc_val->scalartyp() == 'dateTime.iso8601')
            {
                // we return a Datetime object instead of a string
                // since now the constructor of xmlrpcval accepts safely strings, ints and datetimes,
                // we cater to all 3 cases here
                $out = $xmlrpc_val->scalarval();
                if (is_string($out))
                {
                    $out = strtotime($out);
                }
                if (is_int($out))
                {
                    $result = new Datetime();
                    $result->setTimestamp($out);
                    return $result;
                }
                elseif (is_a($out, 'Datetime'))
                {
                    return $out;
                }
            }
            return $xmlrpc_val->scalarval();
        case 'array':
            $size = $xmlrpc_val->arraysize();
            $arr = array();
            for($i = 0; $i < $size; $i++)
            {
                $arr[] = php_xmlrpc_decode($xmlrpc_val->arraymem($i), $options);
            }
            return $arr;
        case 'struct':
            $xmlrpc_val->structreset();
            // If user said so, try to rebuild php objects for specific struct vals.
            /// @todo should we raise a warning for class not found?
            // shall we check for proper subclass of xmlrpcval instead of
            // presence of _php_class to detect what we can do?
            if (in_array('decode_php_objs', $options) && $xmlrpc_val->_php_class != ''
                && class_exists($xmlrpc_val->_php_class))
            {
                $obj = @new $xmlrpc_val->_php_class;
                while(list($key,$value)=$xmlrpc_val->structeach())
                {
                    $obj->$key = php_xmlrpc_decode($value, $options);
                }
                return $obj;
            }
            else
            {
                $arr = array();
                while(list($key,$value)=$xmlrpc_val->structeach())
                {
                    $arr[$key] = php_xmlrpc_decode($value, $options);
                }
                return $arr;
            }
        case 'msg':
            $paramcount = $xmlrpc_val->getNumParams();
            $arr = array();
            for($i = 0; $i < $paramcount; $i++)
            {
                $arr[] = php_xmlrpc_decode($xmlrpc_val->getParam($i));
            }
            return $arr;
    }
}

// This constant left here only for historical reasons...
// it was used to decide if we have to define xmlrpc_encode on our own, but
// we do not do it anymore
if(function_exists('xmlrpc_decode'))
{
    define('XMLRPC_EPI_ENABLED','1');
}
else
{
    define('XMLRPC_EPI_ENABLED','0');
}

/**
 * Takes native php types and encodes them into xmlrpc PHP object format.
 * It will not re-encode xmlrpcval objects.
 *
 * Feature creep -- could support more types via optional type argument
 * (string => datetime support has been added, ??? => base64 not yet)
 *
 * If given a proper options parameter, php object instances will be encoded
 * into 'special' xmlrpc values, that can later be decoded into php objects
 * by calling php_xmlrpc_decode() with a corresponding option
 *
 * @author Dan Libby (dan@libby.com)
 *
 * @param mixed $php_val the value to be converted into an xmlrpcval object
 * @param array $options	can include 'encode_php_objs', 'auto_dates', 'null_extension' or 'extension_api'
 * @return xmlrpcval
 */
function php_xmlrpc_encode($php_val, $options=array())
{
    $type = gettype($php_val);
    switch($type)
    {
        case 'string':
            if (in_array('auto_dates', $options) && preg_match('/^[0-9]{8}T[0-9]{2}:[0-9]{2}:[0-9]{2}$/', $php_val)){
                $xmlrpc_val = new xmlrpcval($php_val, $GLOBALS['xmlrpcDateTime']);
            } else if(in_array('auto_base64', $options) && strpos($php_val, 'BASE64:') === 0){
                $xmlrpc_val = new xmlrpcval(substr($php_val, 7), $GLOBALS['xmlrpcBase64']);
            } else{
                $xmlrpc_val = new xmlrpcval($php_val, $GLOBALS['xmlrpcString']);
            }
            break;
        case 'integer':
            $xmlrpc_val = new xmlrpcval($php_val, $GLOBALS['xmlrpcInt']);
            break;
        case 'double':
            $xmlrpc_val = new xmlrpcval($php_val, $GLOBALS['xmlrpcDouble']);
            break;
        // <G_Giunta_2001-02-29>
        // Add support for encoding/decoding of booleans, since they are supported in PHP
        case 'boolean':
            $xmlrpc_val = new xmlrpcval($php_val, $GLOBALS['xmlrpcBoolean']);
            break;
        // </G_Giunta_2001-02-29>
        case 'array':
            // PHP arrays can be encoded to either xmlrpc structs or arrays,
            // depending on wheter they are hashes or plain 0..n integer indexed
            // A shorter one-liner would be
            // $tmp = array_diff(array_keys($php_val), range(0, count($php_val)-1));
            // but execution time skyrockets!
            $j = 0;
            $arr = array();
            $ko = false;
            foreach($php_val as $key => $val)
            {
                $arr[$key] = php_xmlrpc_encode($val, $options);
                if(!$ko && $key !== $j)
                {
                    $ko = true;
                }
                $j++;
            }
            if($ko)
            {
                $xmlrpc_val = new xmlrpcval($arr, $GLOBALS['xmlrpcStruct']);
            }
            else
            {
                $xmlrpc_val = new xmlrpcval($arr, $GLOBALS['xmlrpcArray']);
            }
            break;
        case 'object':
            if(is_a($php_val, 'xmlrpcval'))
            {
                $xmlrpc_val = $php_val;
            }
            else if(is_a($php_val, 'DateTime'))
            {
                $xmlrpc_val = new xmlrpcval($php_val->format('Ymd\TH:i:s'), $GLOBALS['xmlrpcStruct']);
            }
            else
            {
                $arr = array();
                reset($php_val);
                while(list($k,$v) = each($php_val))
                {
                    $arr[$k] = php_xmlrpc_encode($v, $options);
                }
                $xmlrpc_val = new xmlrpcval($arr, $GLOBALS['xmlrpcStruct']);
                if (in_array('encode_php_objs', $options))
                {
                    // let's save original class name into xmlrpcval:
                    // might be useful later on...
                    $xmlrpc_val->_php_class = get_class($php_val);
                }
            }
            break;
        case 'NULL':
            if (in_array('extension_api', $options))
            {
                $xmlrpc_val = new xmlrpcval('', $GLOBALS['xmlrpcString']);
            }
            else if (in_array('null_extension', $options))
            {
                $xmlrpc_val = new xmlrpcval('', $GLOBALS['xmlrpcNull']);
            }
            else
            {
                $xmlrpc_val = new xmlrpcval();
            }
            break;
        case 'resource':
            if (in_array('extension_api', $options))
            {
                $xmlrpc_val = new xmlrpcval((int)$php_val, $GLOBALS['xmlrpcInt']);
            }
            else
            {
                $xmlrpc_val = new xmlrpcval();
            }
        // catch "user function", "unknown type"
        default:
            // giancarlo pinerolo <ping@alt.it>
            // it has to return
            // an empty object in case, not a boolean.
            $xmlrpc_val = new xmlrpcval();
            break;
    }
    return $xmlrpc_val;
}

/**
 * Convert the xml representation of a method response, method request or single
 * xmlrpc value into the appropriate object (a.k.a. deserialize)
 * @param string $xml_val
 * @param array $options
 * @return mixed false on error, or an instance of either xmlrpcval, xmlrpcmsg or xmlrpcresp
 */
function php_xmlrpc_decode_xml($xml_val, $options=array())
{
    $GLOBALS['_xh'] = array();
    $GLOBALS['_xh']['ac'] = '';
    $GLOBALS['_xh']['stack'] = array();
    $GLOBALS['_xh']['valuestack'] = array();
    $GLOBALS['_xh']['params'] = array();
    $GLOBALS['_xh']['pt'] = array();
    $GLOBALS['_xh']['isf'] = 0;
    $GLOBALS['_xh']['isf_reason'] = '';
    $GLOBALS['_xh']['method'] = false;
    $GLOBALS['_xh']['rt'] = '';
    /// @todo 'guestimate' encoding
    $parser = xml_parser_create();
    xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, true);
    // What if internal encoding is not in one of the 3 allowed?
    // we use the broadest one, ie. utf8!
    if (!in_array($GLOBALS['xmlrpc_internalencoding'], array('UTF-8', 'ISO-8859-1', 'US-ASCII')))
    {
        xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, 'UTF-8');
    }
    else
    {
        xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, $GLOBALS['xmlrpc_internalencoding']);
    }
    xml_set_element_handler($parser, 'xmlrpc_se_any', 'xmlrpc_ee');
    xml_set_character_data_handler($parser, 'xmlrpc_cd');
    xml_set_default_handler($parser, 'xmlrpc_dh');
    if(!xml_parse($parser, $xml_val, 1))
    {
        $errstr = sprintf('XML error: %s at line %d, column %d',
            xml_error_string(xml_get_error_code($parser)),
            xml_get_current_line_number($parser), xml_get_current_column_number($parser));
        error_log($errstr);
        xml_parser_free($parser);
        return false;
    }
    xml_parser_free($parser);
    if ($GLOBALS['_xh']['isf'] > 1) // test that $GLOBALS['_xh']['value'] is an obj, too???
    {
        error_log($GLOBALS['_xh']['isf_reason']);
        return false;
    }
    switch ($GLOBALS['_xh']['rt'])
    {
        case 'methodresponse':
            $v =& $GLOBALS['_xh']['value'];
            if ($GLOBALS['_xh']['isf'] == 1)
            {
                $vc = $v->structmem('faultCode');
                $vs = $v->structmem('faultString');
                $r = new xmlrpcresp(0, $vc->scalarval(), $vs->scalarval());
            }
            else
            {
                $r = new xmlrpcresp($v);
            }
            return $r;
        case 'methodcall':
            $m = new xmlrpcmsg($GLOBALS['_xh']['method']);
            for($i=0; $i < count($GLOBALS['_xh']['params']); $i++)
            {
                $m->addParam($GLOBALS['_xh']['params'][$i]);
            }
            return $m;
        case 'value':
            return $GLOBALS['_xh']['value'];
        default:
            return false;
    }
}

/**
 * decode a string that is encoded w/ "chunked" transfer encoding
 * as defined in rfc2068 par. 19.4.6
 * code shamelessly stolen from nusoap library by Dietrich Ayala
 *
 * @param string $buffer the string to be decoded
 * @return string
 */
function decode_chunked($buffer)
{
    // length := 0
    $length = 0;
    $new = '';

    // read chunk-size, chunk-extension (if any) and crlf
    // get the position of the linebreak
    $chunkend = strpos($buffer,"\r\n") + 2;
    $temp = substr($buffer,0,$chunkend);
    $chunk_size = hexdec( trim($temp) );
    $chunkstart = $chunkend;
    while($chunk_size > 0)
    {
        $chunkend = strpos($buffer, "\r\n", $chunkstart + $chunk_size);

        // just in case we got a broken connection
        if($chunkend == false)
        {
            $chunk = substr($buffer,$chunkstart);
            // append chunk-data to entity-body
            $new .= $chunk;
            $length += strlen($chunk);
            break;
        }

        // read chunk-data and crlf
        $chunk = substr($buffer,$chunkstart,$chunkend-$chunkstart);
        // append chunk-data to entity-body
        $new .= $chunk;
        // length := length + chunk-size
        $length += strlen($chunk);
        // read chunk-size and crlf
        $chunkstart = $chunkend + 2;

        $chunkend = strpos($buffer,"\r\n",$chunkstart)+2;
        if($chunkend == false)
        {
            break; //just in case we got a broken connection
        }
        $temp = substr($buffer,$chunkstart,$chunkend-$chunkstart);
        $chunk_size = hexdec( trim($temp) );
        $chunkstart = $chunkend;
    }
    return $new;
}

/**
 * xml charset encoding guessing helper function.
 * Tries to determine the charset encoding of an XML chunk received over HTTP.
 * NB: according to the spec (RFC 3023), if text/xml content-type is received over HTTP without a content-type,
 * we SHOULD assume it is strictly US-ASCII. But we try to be more tolerant of unconforming (legacy?) clients/servers,
 * which will be most probably using UTF-8 anyway...
 *
 * @param string $httpheader the http Content-type header
 * @param string $xmlchunk xml content buffer
 * @param string $encoding_prefs comma separated list of character encodings to be used as default (when mb extension is enabled)
 * @return string
 *
 * @todo explore usage of mb_http_input(): does it detect http headers + post data? if so, use it instead of hand-detection!!!
 */
function guess_encoding($httpheader='', $xmlchunk='', $encoding_prefs=null)
{
    // discussion: see http://www.yale.edu/pclt/encoding/
    // 1 - test if encoding is specified in HTTP HEADERS

    //Details:
    // LWS:           (\13\10)?( |\t)+
    // token:         (any char but excluded stuff)+
    // quoted string: " (any char but double quotes and cointrol chars)* "
    // header:        Content-type = ...; charset=value(; ...)*
    //   where value is of type token, no LWS allowed between 'charset' and value
    // Note: we do not check for invalid chars in VALUE:
    //   this had better be done using pure ereg as below
    // Note 2: we might be removing whitespace/tabs that ought to be left in if
    //   the received charset is a quoted string. But nobody uses such charset names...

    /// @todo this test will pass if ANY header has charset specification, not only Content-Type. Fix it?
    $matches = array();
    if(preg_match('/;\s*charset\s*=([^;]+)/i', $httpheader, $matches))
    {
        return strtoupper(trim($matches[1], " \t\""));
    }

    // 2 - scan the first bytes of the data for a UTF-16 (or other) BOM pattern
    //     (source: http://www.w3.org/TR/2000/REC-xml-20001006)
    //     NOTE: actually, according to the spec, even if we find the BOM and determine
    //     an encoding, we should check if there is an encoding specified
    //     in the xml declaration, and verify if they match.
    /// @todo implement check as described above?
    /// @todo implement check for first bytes of string even without a BOM? (It sure looks harder than for cases WITH a BOM)
    if(preg_match('/^(\x00\x00\xFE\xFF|\xFF\xFE\x00\x00|\x00\x00\xFF\xFE|\xFE\xFF\x00\x00)/', $xmlchunk))
    {
        return 'UCS-4';
    }
    elseif(preg_match('/^(\xFE\xFF|\xFF\xFE)/', $xmlchunk))
    {
        return 'UTF-16';
    }
    elseif(preg_match('/^(\xEF\xBB\xBF)/', $xmlchunk))
    {
        return 'UTF-8';
    }

    // 3 - test if encoding is specified in the xml declaration
    // Details:
    // SPACE:         (#x20 | #x9 | #xD | #xA)+ === [ \x9\xD\xA]+
    // EQ:            SPACE?=SPACE? === [ \x9\xD\xA]*=[ \x9\xD\xA]*
    if (preg_match('/^<\?xml\s+version\s*=\s*'. "((?:\"[a-zA-Z0-9_.:-]+\")|(?:'[a-zA-Z0-9_.:-]+'))".
        '\s+encoding\s*=\s*' . "((?:\"[A-Za-z][A-Za-z0-9._-]*\")|(?:'[A-Za-z][A-Za-z0-9._-]*'))/",
        $xmlchunk, $matches))
    {
        return strtoupper(substr($matches[2], 1, -1));
    }

    // 4 - if mbstring is available, let it do the guesswork
    // NB: we favour finding an encoding that is compatible with what we can process
    if(extension_loaded('mbstring'))
    {
        if($encoding_prefs)
        {
            $enc = mb_detect_encoding($xmlchunk, $encoding_prefs);
        }
        else
        {
            $enc = mb_detect_encoding($xmlchunk);
        }
        // NB: mb_detect likes to call it ascii, xml parser likes to call it US_ASCII...
        // IANA also likes better US-ASCII, so go with it
        if($enc == 'ASCII')
        {
            $enc = 'US-'.$enc;
        }
        return $enc;
    }
    else
    {
        // no encoding specified: as per HTTP1.1 assume it is iso-8859-1?
        // Both RFC 2616 (HTTP 1.1) and 1945 (HTTP 1.0) clearly state that for text/xxx content types
        // this should be the standard. And we should be getting text/xml as request and response.
        // BUT we have to be backward compatible with the lib, which always used UTF-8 as default...
        return $GLOBALS['xmlrpc_defencoding'];
    }
}

/**
 * Checks if a given charset encoding is present in a list of encodings or
 * if it is a valid subset of any encoding in the list
 * @param string $encoding charset to be tested
 * @param mixed $validlist comma separated list of valid charsets (or array of charsets)
 * @return bool
 */
function is_valid_charset($encoding, $validlist)
{
    $charset_supersets = array(
        'US-ASCII' => array ('ISO-8859-1', 'ISO-8859-2', 'ISO-8859-3', 'ISO-8859-4',
            'ISO-8859-5', 'ISO-8859-6', 'ISO-8859-7', 'ISO-8859-8',
            'ISO-8859-9', 'ISO-8859-10', 'ISO-8859-11', 'ISO-8859-12',
            'ISO-8859-13', 'ISO-8859-14', 'ISO-8859-15', 'UTF-8',
            'EUC-JP', 'EUC-', 'EUC-KR', 'EUC-CN')
    );
    if (is_string($validlist))
        $validlist = explode(',', $validlist);
    if (@in_array(strtoupper($encoding), $validlist))
        return true;
    else
    {
        if (array_key_exists($encoding, $charset_supersets))
            foreach ($validlist as $allowed)
                if (in_array($allowed, $charset_supersets[$encoding]))
                    return true;
        return false;
    }
}