问脚本和标记不会保存或输出我的自定义元框。

EN

// Sanitize user input.
$my_data = sanitize_text_field( $_POST['global_notice'] );

ID, '_global_notice', true );

    echo 'Paste your VBO plugin embed code in the text area below:';

    echo '' . esc_attr( $value ) . '';

    echo 'Next, copy/paste [vbo-plugin-embed] into the content area where you want the plugin to load on this page.';
}

/**
 * When the post is saved, saves our custom data.
 *
 * @param int $post_id
 */
function save_global_notice_meta_box_data( $post_id ) {

    // Check if our nonce is set.
    if ( ! isset( $_POST['global_notice_nonce'] ) ) {
        return;
    }

    // Verify that the nonce is valid.
    if ( ! wp_verify_nonce( $_POST['global_notice_nonce'], 'global_notice_nonce' ) ) {
        return;
    }

    // If this is an autosave, our form has not been submitted, so we don't want to do anything.
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
        return;
    }

    // Check the user's permissions.
    if ( isset( $_POST['post_type'] ) && 'page' == $_POST['post_type'] ) {

        if ( ! current_user_can( 'edit_page', $post_id ) ) {
            return;
        }

    }
    else {

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return;
        }
    }

    /* OK, it's safe for us to save the data now. */

    // Make sure that it is set.
    if ( ! isset( $_POST['global_notice'] ) ) {
        return;
    }

    // Sanitize user input.
    //$my_data = sanitize_text_field( $_POST['global_notice'] );
    $my_data = $_POST['global_notice'];

    // Update the meta field in the database.
    update_post_meta( $post_id, '_global_notice', $my_data );
}

add_action( 'save_post', 'save_global_notice_meta_box_data' );

// Add shortcode [vbo-plugin-embed]
function vbo_embed_sc( $atts ){

    global $post;

    // retrieve the global notice for the current post
    $global_notice = esc_attr( get_post_meta( $post->ID, '_global_notice', true ) );

    return $global_notice;
}
add_shortcode( 'vbo-plugin-embed', 'vbo_embed_sc' );