finlabsindia/newSite/wp-content/plugins/taskereasy-plugin/inc/metaboxes/banner-meta.php

<?php
function page_options_meta() {
    add_meta_box( 'page_option', esc_html__( 'Page Options', 'taskereasy' ), 'page_option_meta', 'page', 'normal', 'high' );
}
add_action( 'add_meta_boxes', 'page_options_meta' );

/**
 * Outputs the content of the meta box
 */

function page_option_meta( $post ) {
    wp_nonce_field( basename( __FILE__ ), 'pageopt_nonce' );
    $pagopt_stored_meta = get_post_meta( $post->ID );
    ?>

 <p>
    <span class="pageopt-row-title"><?php _e( 'Check if hide page banner: ', 'taskereasy' )?></span>
    <div class="pageopt-row-content">
        <label for="featured-checkbox">
            <input type="checkbox" name="page-banner" id="page-banner" value="yes" <?php if ( isset ( $pagopt_stored_meta['page-banner'] ) ) checked( $pagopt_stored_meta['page-banner'][0], 'yes' ); ?> />
            <?php _e( 'Hide Page Banner', 'taskereasy' )?>
        </label>

    </div>
</p>

    <?php
}

/**
 * Saves the custom meta input
 */
function pageopt_meta_save( $post_id ) {

    // Checks save status - overcome autosave, etc.
    $is_autosave = wp_is_post_autosave( $post_id );
    $is_revision = wp_is_post_revision( $post_id );
    $is_valid_nonce = ( isset( $_POST[ 'pageopt_nonce' ] ) && wp_verify_nonce( $_POST[ 'pageopt_nonce' ], basename( __FILE__ ) ) ) ? 'true' : 'false';

    // Exits script depending on save status
    if ( $is_autosave || $is_revision || !$is_valid_nonce ) {
        return;
    }

// Checks for input and saves - save checked as yes and unchecked at no
if( isset( $_POST[ 'page-banner' ] ) ) {
    update_post_meta( $post_id, 'page-banner', 'yes' );
} else {
    update_post_meta( $post_id, 'page-banner', 'no' );
}

}
add_action( 'save_post', 'pageopt_meta_save' );