Title: Call to undefined function
Last modified: August 30, 2016

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# Call to undefined function

 *  [lowerym](https://wordpress.org/support/users/lowerym/)
 * (@lowerym)
 * [10 years, 9 months ago](https://wordpress.org/support/topic/call-to-undefined-function-18/)
 * I am working on this website, themarshlife.com, and whenever I try to access 
   the site, I get this message:
 * Fatal error: Call to undefined function add_action() in /home/marshlife/public_html/
   wp-includes/functions.php on line 50
 * I’ve checked the file and this is what is one line 50:
 * add_action( ‘after_setup_theme’, ‘twentyeleven_setup’ );
 * I’ve been trying to figure out what to do, but I’m worried about accidentally
   wiping out everything on the site. What can I do to fix this?

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [Kor](https://wordpress.org/support/users/korchung/)
 * (@korchung)
 * [10 years, 9 months ago](https://wordpress.org/support/topic/call-to-undefined-function-18/#post-6527897)
 * Hello,
 * Try [manually resetting your plugins](https://codex.wordpress.org/FAQ_Troubleshooting#How_to_deactivate_all_plugins_when_not_able_to_access_the_administrative_menus.3F)(
   no Dashboard access required). If that resolves the issue, reactivate each one
   individually until you find the cause.
 * If that does not resolve the issue, access your server via [FTP or SFTP](https://codex.wordpress.org/FTP_Clients),
   navigate to `/wp-content/themes/` and rename the directory of your currently 
   active theme. This will force the default theme to activate and hopefully rule-
   out a theme-specific issue (theme functions can interfere like plugins).
 * Regards
 * KC
 *  Thread Starter [lowerym](https://wordpress.org/support/users/lowerym/)
 * (@lowerym)
 * [10 years, 9 months ago](https://wordpress.org/support/topic/call-to-undefined-function-18/#post-6527900)
 * KC,
 * I tried both methods and neither one seems to be working for me.
 * Here’s the code of my functions.php file from my wp-includes file:
 * <?php
    /** * Twenty Eleven functions and definitions * * Sets up the theme and
   provides some helper functions. Some helper functions * are used in the theme
   as custom template tags. Others are attached to action and * filter hooks in 
   WordPress to change core functionality. * * The first function, twentyeleven_setup(),
   sets up the theme by registering support * for various features in WordPress,
   such as post thumbnails, navigation menus, and the like. * * When using a child
   theme (see [http://codex.wordpress.org/Theme_Development](http://codex.wordpress.org/Theme_Development)
   and * [http://codex.wordpress.org/Child_Themes](http://codex.wordpress.org/Child_Themes)),
   you can override certain functions * (those wrapped in a function_exists() call)
   by defining them first in your child theme’s * functions.php file. The child 
   theme’s functions.php file is included before the parent * theme’s file, so the
   child theme functions would be used. * * Functions that are not pluggable (not
   wrapped in function_exists()) are instead attached * to a filter or action hook.
   The hook can be removed by using remove_action() or * remove_filter() and you
   can attach your own function to the hook. * * We can remove the parent theme’s
   hook only after it is attached, which means we need to * wait until setting up
   the child theme: * * ` * add_action( 'after_setup_theme', 'my_child_theme_setup');*
   function my_child_theme_setup() { * // We are providing our own filter for excerpt_length(
   or using the unfiltered value) * remove_filter( 'excerpt_length', 'twentyeleven_excerpt_length');*...*}***
   For more information on hooks, actions, and filters, see [http://codex.wordpress.org/Plugin_API](http://codex.wordpress.org/Plugin_API).**
   [@package](https://wordpress.org/support/users/package/) WordPress * @subpackage
   Twenty_Eleven * [@since](https://wordpress.org/support/users/since/) Twenty Eleven
   1.0 */
 * /**
    * Set the content width based on the theme’s design and stylesheet. */ if(!
   isset( $content_width ) ) $content_width = 584;
 * /**
    * Tell WordPress to run twentyeleven_setup() when the ‘after_setup_theme’
   hook is run. */ add_action( ‘after_setup_theme’, ‘twentyeleven_setup’ );
 * if ( ! function_exists( ‘twentyeleven_setup’ ) ):
    /** * Sets up theme defaults
   and registers support for various WordPress features. * * Note that this function
   is hooked into the after_setup_theme hook, which runs * before the init hook.
   The init hook is too late for some features, such as indicating * support post
   thumbnails. * * To override twentyeleven_setup() in a child theme, add your own
   twentyeleven_setup to your child theme’s * functions.php file. * * @uses load_theme_textdomain()
   For translation/localization support. * @uses add_editor_style() To style the
   visual editor. * @uses add_theme_support() To add support for post thumbnails,
   automatic feed links, and Post Formats. * @uses register_nav_menus() To add support
   for navigation menus. * @uses add_custom_background() To add support for a custom
   background. * @uses add_custom_image_header() To add support for a custom header.*
   @uses register_default_headers() To register the default custom header images
   provided with the theme. * @uses set_post_thumbnail_size() To set a custom post
   thumbnail size. * * [@since](https://wordpress.org/support/users/since/) Twenty
   Eleven 1.0 */ function twentyeleven_setup() {
 *  /* Make Twenty Eleven available for translation.
    * Translations can be added
   to the /languages/ directory. * If you’re building a theme based on Twenty Eleven,
   use a find and replace * to change ‘twentyeleven’ to the name of your theme in
   all the template files. */ load_theme_textdomain( ‘twentyeleven’, TEMPLATEPATH.‘/
   languages’ );
 *  $locale = get_locale();
    $locale_file = TEMPLATEPATH . “/languages/$locale.php”;
   if ( is_readable( $locale_file ) ) require_once( $locale_file );
 *  // This theme styles the visual editor with editor-style.css to match the theme
   style.
    add_editor_style();
 *  // Load up our theme options page and related code.
    require( dirname( __FILE__).‘/
   inc/theme-options.php’ );
 *  // Grab Twenty Eleven’s Ephemera widget.
    require( dirname( __FILE__ ) . ‘/inc/
   widgets.php’ );
 *  // Add default posts and comments RSS feed links to <head>.
    add_theme_support(‘
   automatic-feed-links’ );
 *  // This theme uses wp_nav_menu() in one location.
    register_nav_menu( ‘primary’,
   __( ‘Primary Menu’, ‘twentyeleven’ ) ); register_nav_menu( ‘categories’, __( ‘
   Category Menu’, ‘twentyeleven’ ) ); register_nav_menu( ‘top’, __( ‘Top Menu’,‘
   twentyeleven’ ) ); register_nav_menu( ‘footer’, __( ‘Footer Primary’, ‘twentyeleven’));
 *  // Add support for a variety of post formats
    add_theme_support( ‘post-formats’,
   array( ‘aside’, ‘link’, ‘gallery’, ‘status’, ‘quote’, ‘image’ ) );
 *  // Add support for custom backgrounds
    add_custom_background();
 *  // This theme uses Featured Images (also known as post thumbnails) for per-post/
   per-page Custom Header images
    add_theme_support( ‘post-thumbnails’ );
 *  // The next four constants set how Twenty Eleven supports custom headers.
 *  // The default header text color
    define( ‘HEADER_TEXTCOLOR’, ‘000’ );
 *  // By leaving empty, we allow for random image rotation.
    define( ‘HEADER_IMAGE’,”);
 *  // The height and width of your custom header.
    // Add a filter to twentyeleven_header_image_width
   and twentyeleven_header_image_height to change these values. define( ‘HEADER_IMAGE_WIDTH’,
   apply_filters( ‘twentyeleven_header_image_width’, 1000 ) ); define( ‘HEADER_IMAGE_HEIGHT’,
   apply_filters( ‘twentyeleven_header_image_height’, 288 ) );
 *  // We’ll be using post thumbnails for custom header images on posts and pages.
   //
   We want them to be the size of the header image that we just defined // Larger
   images will be auto-cropped to fit, smaller ones will be ignored. See header.
   php. set_post_thumbnail_size( HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT, true );
 *  // Add Twenty Eleven’s custom image sizes
    add_image_size( ‘large-feature’, 
   HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT, true ); // Used for large feature (header)
   images add_image_size( ‘small-feature’, 500, 300 ); // Used for featured posts
   if a large-feature doesn’t exist
 *  // Turn on random header image rotation by default.
    add_theme_support( ‘custom-
   header’, array( ‘random-default’ => true ) );
 *  // Add a way for the custom header to be styled in the admin panel that controls
   //
   custom headers. See twentyeleven_admin_header_style(), below. add_custom_image_header(‘
   twentyeleven_header_style’, ‘twentyeleven_admin_header_style’, ‘twentyeleven_admin_header_image’);
 *  // … and thus ends the changeable header business.
 *  // Default custom headers packaged with the theme. %s is a placeholder for the
   theme template directory URI.
    register_default_headers( array( ‘wheel’ => array(‘
   url’ => ‘%s/images/headers/wheel.jpg’, ‘thumbnail_url’ => ‘%s/images/headers/
   wheel-thumbnail.jpg’, /* translators: header image description */ ‘description’
   => __( ‘Wheel’, ‘twentyeleven’ ) ), ‘shore’ => array( ‘url’ => ‘%s/images/headers/
   shore.jpg’, ‘thumbnail_url’ => ‘%s/images/headers/shore-thumbnail.jpg’, /* translators:
   header image description */ ‘description’ => __( ‘Shore’, ‘twentyeleven’ ) ),‘
   trolley’ => array( ‘url’ => ‘%s/images/headers/trolley.jpg’, ‘thumbnail_url’ 
   => ‘%s/images/headers/trolley-thumbnail.jpg’, /* translators: header image description*/‘
   description’ => __( ‘Trolley’, ‘twentyeleven’ ) ), ‘pine-cone’ => array( ‘url’
   => ‘%s/images/headers/pine-cone.jpg’, ‘thumbnail_url’ => ‘%s/images/headers/pine-
   cone-thumbnail.jpg’, /* translators: header image description */ ‘description’
   => __( ‘Pine Cone’, ‘twentyeleven’ ) ), ‘chessboard’ => array( ‘url’ => ‘%s/images/
   headers/chessboard.jpg’, ‘thumbnail_url’ => ‘%s/images/headers/chessboard-thumbnail.
   jpg’, /* translators: header image description */ ‘description’ => __( ‘Chessboard’,‘
   twentyeleven’ ) ), ‘lanterns’ => array( ‘url’ => ‘%s/images/headers/lanterns.
   jpg’, ‘thumbnail_url’ => ‘%s/images/headers/lanterns-thumbnail.jpg’, /* translators:
   header image description */ ‘description’ => __( ‘Lanterns’, ‘twentyeleven’ )),‘
   willow’ => array( ‘url’ => ‘%s/images/headers/willow.jpg’, ‘thumbnail_url’ =>‘%
   s/images/headers/willow-thumbnail.jpg’, /* translators: header image description*/‘
   description’ => __( ‘Willow’, ‘twentyeleven’ ) ), ‘hanoi’ => array( ‘url’ => ‘%
   s/images/headers/hanoi.jpg’, ‘thumbnail_url’ => ‘%s/images/headers/hanoi-thumbnail.
   jpg’, /* translators: header image description */ ‘description’ => __( ‘Hanoi
   Plant’, ‘twentyeleven’ ) ) ) ); } endif; // twentyeleven_setup
 * if ( ! function_exists( ‘twentyeleven_header_style’ ) ) :
    /** * Styles the header
   image and text displayed on the blog * * [@since](https://wordpress.org/support/users/since/)
   Twenty Eleven 1.0 */ function twentyeleven_header_style() {
 *  // If no custom options for text are set, let’s bail
    // get_header_textcolor()
   options: HEADER_TEXTCOLOR is default, hide text (returns ‘blank’) or any hex 
   value if ( HEADER_TEXTCOLOR == get_header_textcolor() ) return; // If we get 
   this far, we have custom styles. Let’s do this. ?> <style type=”text/css”> <?
   php // Has the text been hidden? if ( ‘blank’ == get_header_textcolor() ) : ?
   > #site-title, #site-description { position: absolute !important; clip: rect(
   1px 1px 1px 1px); /* IE6, IE7 */ clip: rect(1px, 1px, 1px, 1px); } <?php // If
   the user has set a custom color for the text use that else : ?> #site-title a,#
   site-description { color: #<?php echo get_header_textcolor(); ?> !important; }
   <?php endif; ?> </style> <?php } endif; // twentyeleven_header_style
 * if ( ! function_exists( ‘twentyeleven_admin_header_style’ ) ) :
    /** * Styles
   the header image displayed on the Appearance > Header admin panel. * * Referenced
   via add_custom_image_header() in twentyeleven_setup(). * * [@since](https://wordpress.org/support/users/since/)
   Twenty Eleven 1.0 */ function twentyeleven_admin_header_style() { ?> <style type
   =”text/css”> .appearance_page_custom-header #headimg { border: none; } #headimg
   h1, #desc { font-family: “Helvetica Neue”, Arial, Helvetica, “Nimbus Sans L”,
   sans-serif; } #headimg h1 { margin: 0; } #headimg h1 a { font-size: 32px; line-
   height: 36px; text-decoration: none; } #desc { font-size: 14px; line-height: 
   23px; padding: 0 0 3em; } <?php // If the user has set a custom color for the
   text use that if ( get_header_textcolor() != HEADER_TEXTCOLOR ) : ?> #site-title
   a, #site-description { color: #<?php echo get_header_textcolor(); ?>; } <?php
   endif; ?> #headimg img { max-width: 1000px; height: auto; width: 100%; } </style
   > <?php } endif; // twentyeleven_admin_header_style
 * if ( ! function_exists( ‘twentyeleven_admin_header_image’ ) ) :
    /** * Custom
   header image markup displayed on the Appearance > Header admin panel. * * Referenced
   via add_custom_image_header() in twentyeleven_setup(). * * [@since](https://wordpress.org/support/users/since/)
   Twenty Eleven 1.0 */ function twentyeleven_admin_header_image() { ?> <div id=”
   headimg”> <?php if ( ‘blank’ == get_theme_mod( ‘header_textcolor’, HEADER_TEXTCOLOR)
   || ” == get_theme_mod( ‘header_textcolor’, HEADER_TEXTCOLOR ) ) $style = ‘ style
   =”display:none;”‘; else $style = ‘ style=”color:#’ . get_theme_mod( ‘header_textcolor’,
   HEADER_TEXTCOLOR ) . ‘;”‘; ?> <h1> onclick=”return false;” href=”<?php echo esc_url(
   home_url( ‘/’ ) ); ?>”><?php bloginfo( ‘name’ ); ?></h1> <div id=”desc”<?php 
   echo $style; ?>><?php bloginfo( ‘description’ ); ?></div> <?php $header_image
   = get_header_image(); if ( ! empty( $header_image ) ) : ?> <img src=”<?php echo
   esc_url( $header_image ); ?>” alt=”” /> <?php endif; ?> </div> <?php } endif;//
   twentyeleven_admin_header_image
 * /**
    * Sets the post excerpt length to 40 words. * * To override this length 
   in a child theme, remove the filter and add your own * function tied to the excerpt_length
   filter hook. */ function twentyeleven_excerpt_length( $length ) { return 40; }
   add_filter( ‘excerpt_length’, ‘twentyeleven_excerpt_length’ );
 * /**
    * Returns a “Continue Reading” link for excerpts */ function twentyeleven_continue_reading_link(){
   return ‘ [‘ . __( ‘Continue reading <span class=”meta-nav”>→</span>’, ‘twentyeleven’ ) . ‘](https://wordpress.org/support/topic/call-to-undefined-function-18/&apos;. esc_url( get_permalink() ) . &apos;?output_format=md)‘;}
 * /**
    * Replaces “[…]” (appended to automatically generated excerpts) with an 
   ellipsis and twentyeleven_continue_reading_link(). * * To override this in a 
   child theme, remove the filter and add your own * function tied to the excerpt_more
   filter hook. */ function twentyeleven_auto_excerpt_more( $more ) { return ‘ …’.
   twentyeleven_continue_reading_link(); } add_filter( ‘excerpt_more’, ‘twentyeleven_auto_excerpt_more’);
 * /**
    * Adds a pretty “Continue Reading” link to custom post excerpts. * * To 
   override this link in a child theme, remove the filter and add your own * function
   tied to the get_the_excerpt filter hook. */ function twentyeleven_custom_excerpt_more(
   $output ) { if ( has_excerpt() && ! is_attachment() ) { $output .= twentyeleven_continue_reading_link();}
   return $output; } add_filter( ‘get_the_excerpt’, ‘twentyeleven_custom_excerpt_more’);
 * /**
    * Get our wp_nav_menu() fallback, wp_page_menu(), to show a home link. */
   function twentyeleven_page_menu_args( $args ) { $args[‘show_home’] = true; return
   $args; } add_filter( ‘wp_page_menu_args’, ‘twentyeleven_page_menu_args’ );
 * /**
    * Register our sidebars and widgetized areas. Also register the default 
   Epherma widget. * * [@since](https://wordpress.org/support/users/since/) Twenty
   Eleven 1.0 */ function twentyeleven_widgets_init() {
 *  register_widget( ‘Twenty_Eleven_Ephemera_Widget’ );
 *  register_sidebar( array(
    ‘name’ => __( ‘Login’, ‘twentyeleven’ ), ‘id’ => ‘
   sidebar-1’, ‘before_widget’ => ‘<aside id=”%1$s” class=”widget %2$s”>’, ‘after_widget’
   => “</aside>”, ‘before_title’ => ‘<h3 class=”widget-title”>’, ‘after_title’ =
   > ‘</h3>’, ) );
 *  register_sidebar( array(
    ‘name’ => __( ‘Product’, ‘twentyeleven’ ), ‘id’ =>‘
   sidebar-2’, ‘description’ => __( ‘The sidebar for the optional Showcase Template’,‘
   twentyeleven’ ), ‘before_widget’ => ‘<aside id=”%1$s” class=”widget %2$s”>’, ‘
   after_widget’ => “</aside>”, ‘before_title’ => ‘<h3 class=”widget-title”>’, ‘
   after_title’ => ‘</h3>’, ) );
 *  register_sidebar( array(
    ‘name’ => __( ‘Recent Post’, ‘twentyeleven’ ), ‘id’
   => ‘sidebar-3’, ‘description’ => __( ‘An optional widget area for your site footer’,‘
   twentyeleven’ ), ‘before_widget’ => ‘<aside id=”%1$s” class=”widget %2$s”>’, ‘
   after_widget’ => “</aside>”, ‘before_title’ => ‘<h3 class=”widget-title”>’, ‘
   after_title’ => ‘</h3>’, ) );
 *  register_sidebar( array(
    ‘name’ => __( ‘Newsletter’, ‘twentyeleven’ ), ‘id’
   => ‘sidebar-4’, ‘description’ => __( ‘An optional widget area for your site footer’,‘
   twentyeleven’ ), ‘before_widget’ => ‘<aside id=”%1$s” class=”widget %2$s”>’, ‘
   after_widget’ => “</aside>”, ‘before_title’ => ‘<h3 class=”widget-title”>’, ‘
   after_title’ => ‘</h3>’, ) );
 *  register_sidebar( array(
    ‘name’ => __( ‘Internal Pages Sidebar’, ‘twentyeleven’),‘
   id’ => ‘sidebar-5’, ‘description’ => __( ‘An optional widget area for your site
   footer’, ‘twentyeleven’ ), ‘before_widget’ => ‘<aside id=”%1$s” class=”widget%
   2$s”>’, ‘after_widget’ => “</aside>”, ‘before_title’ => ‘<h3 class=”widget-title”
   >’, ‘after_title’ => ‘</h3>’, ) );
 *  register_sidebar( array(
    ‘name’ => __( ‘Shop Pages Sidebar’, ‘twentyeleven’),‘
   id’ => ‘sidebar-6’, ‘description’ => __( ‘An optional widget area for your site
   footer’, ‘twentyeleven’ ), ‘before_widget’ => ‘<aside id=”%1$s” class=”widget%
   2$s”>’, ‘after_widget’ => “</aside>”, ‘before_title’ => ‘<h3 class=”widget-title”
   >’, ‘after_title’ => ‘</h3>’, ) );
 *  register_sidebar( array(
    ‘name’ => __( ‘Ad Manager’, ‘twentyeleven’ ), ‘id’
   => ‘sidebar-7’, ‘description’ => __( ‘The area where ads will rotate’, ‘twentyeleven’),‘
   before_widget’ => ‘<aside id=”%1$s” class=”widget %2$s”>’, ‘after_widget’ => “
   </aside>”, ‘before_title’ => ‘<h3 class=”widget-title”>’, ‘after_title’ => ‘</
   h3>’, ) );
 *  register_sidebar( array(
    ‘name’ => __( ‘Product Categories Menu’, ‘twentyeleven’),‘
   id’ => ‘sidebar-8’, ‘description’ => __( ‘Menu for showing hierarchical view 
   of product categories’, ‘twentyeleven’ ), ‘before_widget’ => ‘<aside id=”%1$s”
   class=”widget %2$s”>’, ‘after_widget’ => “</aside>”, ‘before_title’ => ‘<h3 class
   =”widget-title”>’, ‘after_title’ => ‘</h3>’, ) );
 *  register_sidebar( array(
    ‘name’ => __( ‘Main Shop Page Sidebar’, ‘twentyeleven’),‘
   id’ => ‘sidebar-9’, ‘description’ => __( ‘Main Shop Page Sidebar’, ‘twentyeleven’),‘
   before_widget’ => ‘<aside id=”%1$s” class=”widget %2$s”>’, ‘after_widget’ => “
   </aside>”, ‘before_title’ => ‘<h3 class=”widget-title”>’, ‘after_title’ => ‘</
   h3>’, ) ); } add_action( ‘widgets_init’, ‘twentyeleven_widgets_init’ );
 * /**
    * Display navigation to next/previous pages when applicable */ function 
   twentyeleven_content_nav( $nav_id ) { global $wp_query;
 *  if ( $wp_query->max_num_pages > 1 ) : ?>
    <nav id=”<?php echo $nav_id; ?>”> 
   <h3 class=”assistive-text”><?php _e( ‘Post navigation’, ‘twentyeleven’ ); ?></
   h3> <div class=”nav-previous”><?php next_posts_link( __( ‘<span class=”meta-nav”
   >←</span> Older posts’, ‘twentyeleven’ ) ); ?></div> <div class=”nav-next”><?
   php previous_posts_link( __( ‘Newer posts <span class=”meta-nav”>→</span>’, ‘
   twentyeleven’ ) ); ?></div> </nav><!– #nav-above –> <?php endif; }
 * /**
    * Return the URL for the first link found in the post content. * * [@since](https://wordpress.org/support/users/since/)
   Twenty Eleven 1.0 * [@return](https://wordpress.org/support/users/return/) string
   |bool URL or false when no link is present. */ function twentyeleven_url_grabber(){
   if ( ! preg_match( ‘/<a\s[^>]*?href=[\'”](.+?)[\'”]/is’, get_the_content(), $
   matches ) ) return false;
 *  return esc_url_raw( $matches[1] );
    }
 * /**
    * Count the number of footer sidebars to enable dynamic classes for the 
   footer */ function twentyeleven_footer_sidebar_class() { $count = 0;
 *  if ( is_active_sidebar( ‘sidebar-3’ ) )
    $count++;
 *  if ( is_active_sidebar( ‘sidebar-4’ ) )
    $count++;
 *  if ( is_active_sidebar( ‘sidebar-5’ ) )
    $count++;
 *  $class = ”;
 *  switch ( $count ) {
    case ‘1’: $class = ‘one’; break; case ‘2’: $class = ‘two’;
   break; case ‘3’: $class = ‘three’; break; }
 *  if ( $class )
    echo ‘class=”‘ . $class . ‘”‘; }
 * if ( ! function_exists( ‘twentyeleven_comment’ ) ) :
    /** * Template for comments
   and pingbacks. * * To override this walker in a child theme without modifying
   the comments template * simply create your own twentyeleven_comment(), and that
   function will be used instead. * * Used as a callback by wp_list_comments() for
   displaying the comments. * * [@since](https://wordpress.org/support/users/since/)
   Twenty Eleven 1.0 */ function twentyeleven_comment( $comment, $args, $depth ){
   $GLOBALS[‘comment’] = $comment; switch ( $comment->comment_type ) : case ‘pingback’:
   case ‘trackback’ : ?> <li class=”post pingback”> <p><?php _e( ‘Pingback:’, ‘twentyeleven’);?
   > <?php comment_author_link(); ?><?php edit_comment_link( __( ‘Edit’, ‘twentyeleven’),‘
   <span class=”edit-link”>’, ‘</span>’ ); ?></p> <?php break; default : ?> <li 
   <?php comment_class(); ?> id=”li-comment-<?php comment_ID(); ?>”> <article id
   =”comment-<?php comment_ID(); ?>” class=”comment”> <footer class=”comment-meta”
   > <div class=”comment-author vcard”> <?php $avatar_size = 68; if ( ‘0’ != $comment-
   >comment_parent ) $avatar_size = 39;
 *  echo get_avatar( $comment, $avatar_size );
 *  /* translators: 1: comment author, 2: date and time */
    printf( __( ‘%1$s on%
   2$s <span class=”says”>said:</span>’, ‘twentyeleven’ ), sprintf( ‘<span class
   =”fn”>%s</span>’, get_comment_author_link() ), sprintf( ‘[<time pubdate datetime=”%2$s”>%3$s</time>](https://wordpress.org/support/topic/call-to-undefined-function-18/%1$s?output_format=md)‘,
   esc_url( get_comment_link( $comment->comment_ID ) ), get_comment_time( ‘c’ ),/*
   translators: 1: date, 2: time */ sprintf( __( ‘%1$s at %2$s’, ‘twentyeleven’ ),
   get_comment_date(), get_comment_time() ) ) ); ?>
 *  <?php edit_comment_link( __( ‘Edit’, ‘twentyeleven’ ), ‘<span class=”edit-link”
   >’, ‘</span>’ ); ?>
    </div><!– .comment-author .vcard –>
 *  <?php if ( $comment->comment_approved == ‘0’ ) : ?>
    <em class=”comment-awaiting-
   moderation”><?php _e( ‘Your comment is awaiting moderation.’, ‘twentyeleven’ );?
   >
 *  <?php endif; ?>
 *  </footer>
 *  <div class=”comment-content”><?php comment_text(); ?></div>
 *  <div class=”reply”>
    <?php comment_reply_link( array_merge( $args, array( ‘reply_text’
   => __( ‘Reply <span>↓</span>’, ‘twentyeleven’ ), ‘depth’ => $depth, ‘max_depth’
   => $args[‘max_depth’] ) ) ); ?> </div><!– .reply –> </article><!– #comment-##–
   >
 *  <?php
    break; endswitch; } endif; // ends check for twentyeleven_comment()
 * if ( ! function_exists( ‘twentyeleven_posted_on’ ) ) :
    /** * Prints HTML with
   meta information for the current post-date/time and author. * Create your own
   twentyeleven_posted_on to override in a child theme * * [@since](https://wordpress.org/support/users/since/)
   Twenty Eleven 1.0 */ function twentyeleven_posted_on() { printf( __( ‘<span class
   =”sep”>Posted on </span>[<time class=”entry-date” datetime=”%3$s” pubdate>%4$s</time>](https://wordpress.org/support/topic/call-to-undefined-function-18/%1$s?output_format=md)
   <span class=”by-author”> <span class=”sep”> by </span> <span class=”author vcard”
   >[%7$s](https://wordpress.org/support/topic/call-to-undefined-function-18/%5$s?output_format=md)
   </span></span>’, ‘twentyeleven’ ), esc_url( get_permalink() ), esc_attr( get_the_time()),
   esc_attr( get_the_date( ‘c’ ) ), esc_html( get_the_date() ), esc_url( get_author_posts_url(
   get_the_author_meta( ‘ID’ ) ) ), sprintf( esc_attr__( ‘View all posts by %s’,‘
   twentyeleven’ ), get_the_author() ), esc_html( get_the_author() ) ); } endif;
 * /**
    * Adds two classes to the array of body classes. * The first is if the site
   has only had one author with published posts. * The second is if a singular post
   being displayed * * [@since](https://wordpress.org/support/users/since/) Twenty
   Eleven 1.0 */ function twentyeleven_body_classes( $classes ) {
 *  if ( ! is_multi_author() ) {
    $classes[] = ‘single-author’; }
 *  if ( is_singular() && ! is_home() && ! is_page_template( ‘showcase.php’ ) &&!
   is_page_template( ‘sidebar-page.php’ ) )
    $classes[] = ‘singular’;
 *  return $classes;
    } add_filter( ‘body_class’, ‘twentyeleven_body_classes’ );
 *  /**
    * [@package](https://wordpress.org/support/users/package/) bbPress * @subpackage
   BBP_Twenty_Ten * [@since](https://wordpress.org/support/users/since/) Twenty 
   Ten 1.1 */
 * if ( ! function_exists( ‘bbp_twentyten_setup’ ) ):
    /** * Sets up theme support
   for bbPress * * If you’re looking to add bbPress support into your own custom
   theme, you’ll * want to make sure to use: add_theme_support( ‘bbpress’ ); * *
   [@since](https://wordpress.org/support/users/since/) bbPress (r2652) */ function
   bbp_twentyten_setup() {
 *  // This theme comes bundled with bbPress template files
    add_theme_support( ‘
   bbpress’ ); } /** Tell WordPress to run twentyten_setup() when the ‘after_setup_theme’
   hook is run. */ add_action( ‘after_setup_theme’, ‘bbp_twentyten_setup’ ); endif;
 * if ( !function_exists( ‘bbp_twentyten_enqueue_styles’ ) ) :
    /** * Load the theme
   CSS * * [@since](https://wordpress.org/support/users/since/) bbPress (r2652) **
   @uses wp_enqueue_style() To enqueue the styles */ function bbp_twentyten_enqueue_styles(){
 *  $version = ‘20110808b’;
 *  // Right to left
    if ( is_rtl() ) {
 *  // TwentyTen
    wp_enqueue_style( ‘twentyten’, get_template_directory_uri() . ‘/
   style.css’, ”, $version, ‘screen’ ); wp_enqueue_style( ‘twentyten-rtl’, get_template_directory_uri().‘/
   rtl.css’, ‘twentyten’, $version, ‘screen’ );
 *  // bbPress specific
    wp_enqueue_style( ‘bbp-twentyten-bbpress’, get_stylesheet_directory_uri().‘/
   css/bbpress-rtl.css’, ‘twentyten-rtl’, $version, ‘screen’ );
 *  // Left to right
    } else {
 *  // TwentyTen
    wp_enqueue_style( ‘twentyten’, get_template_directory_uri() . ‘/
   style.css’, ”, $version, ‘screen’ );
 *  // bbPress specific
    wp_enqueue_style( ‘bbp-twentyten-bbpress’, get_stylesheet_directory_uri().‘/
   css/bbpress.css’, ‘twentyten’, $version, ‘screen’ ); } } add_action( ‘bbp_enqueue_scripts’,‘
   bbp_twentyten_enqueue_styles’ ); endif;
 * if ( !function_exists( ‘bbp_twentyten_enqueue_scripts’ ) ) :
    /** * Enqueue the
   required Javascript files * * [@since](https://wordpress.org/support/users/since/)
   bbPress (r2652) * * @uses bbp_is_single_topic() To check if it’s the topic page*
   @uses get_stylesheet_directory_uri() To get the stylesheet directory uri * @uses
   bbp_is_single_user_edit() To check if it’s the profile edit page * @uses wp_enqueue_script()
   To enqueue the scripts */ function bbp_twentyten_enqueue_scripts () {
 *  $version = ‘20110808b’;
 *  if ( bbp_is_single_topic() )
    wp_enqueue_script( ‘bbp_topic’, get_stylesheet_directory_uri().‘/
   js/topic.js’, array( ‘wp-lists’ ), $version );
 *  if ( bbp_is_single_user_edit() )
    wp_enqueue_script( ‘user-profile’ ); } add_action(‘
   bbp_enqueue_scripts’, ‘bbp_twentyten_enqueue_scripts’ ); endif;
 * if ( !function_exists( ‘bbp_twentyten_scripts’ ) ) :
    /** * Put some scripts 
   in the header, like AJAX url for wp-lists * * [@since](https://wordpress.org/support/users/since/)
   bbPress (r2652) * * @uses bbp_is_single_topic() To check if it’s the topic page*
   @uses admin_url() To get the admin url * @uses bbp_is_single_user_edit() To check
   if it’s the profile edit page */ function bbp_twentyten_scripts () { if ( bbp_is_single_topic()):?
   >
 *  <script type=’text/javascript’>
    /* <![CDATA[ */ var ajaxurl = ‘<?php echo admin_url(‘
   admin-ajax.php’ ); ?>’; /* ]]> */ </script>
 *  <?php elseif ( bbp_is_single_user_edit() ) : ?>
 *  <script type=”text/javascript” charset=”utf-8″>
    if ( window.location.hash =
   = ‘#password’ ) { document.getElementById(‘pass1’).focus(); } </script>
 *  <?php
    endif; } add_filter( ‘bbp_head’, ‘bbp_twentyten_scripts’, -1 ); endif;
 * if ( !function_exists( ‘bbp_twentyten_topic_script_localization’ ) ) :
    /** *
   Load localizations for topic script. * * These localizations require information
   that may not be loaded even by init. * * [@since](https://wordpress.org/support/users/since/)
   bbPress (r2652) * * @uses bbp_is_single_topic() To check if it’s the topic page*
   @uses bbp_get_current_user_id() To get the current user id * @uses bbp_get_topic_id()
   To get the topic id * @uses bbp_get_favorites_permalink() To get the favorites
   permalink * @uses bbp_is_user_favorite() To check if the topic is in user’s favorites*
   @uses bbp_is_subscriptions_active() To check if the subscriptions are active *
   @uses bbp_is_user_subscribed() To check if the user is subscribed to topic * 
   @uses bbp_get_topic_permalink() To get the topic permalink * @uses wp_localize_script()
   To localize the script */ function bbp_twentyten_topic_script_localization (){
   if ( !bbp_is_single_topic() ) return;
 *  $user_id = bbp_get_current_user_id();
 *  $localizations = array(
    ‘currentUserId’ => $user_id, ‘topicId’ => bbp_get_topic_id(),);
 *  // Favorites
    if ( bbp_is_favorites_active() ) { $localizations[‘favoritesActive’]
   = 1; $localizations[‘favoritesLink’] = bbp_get_favorites_permalink( $user_id );
   $localizations[‘isFav’] = (int) bbp_is_user_favorite( $user_id ); $localizations[‘
   favLinkYes’] = __( ‘favorites’, ‘bbpress’ ); $localizations[‘favLinkNo’] = __(‘?’,‘
   bbpress’ ); $localizations[‘favYes’] = __( ‘This topic is one of your %favLinkYes%[%
   favDel%]’, ‘bbpress’ ); $localizations[‘favNo’] = __( ‘%favAdd% (%favLinkNo%)’,‘
   bbpress’ ); $localizations[‘favDel’] = __( ‘×’, ‘bbpress’ ); $localizations[‘
   favAdd’] = __( ‘Add this topic to your favorites’, ‘bbpress’ ); } else { $localizations[‘
   favoritesActive’] = 0; }
 *  // Subscriptions
    if ( bbp_is_subscriptions_active() ) { $localizations[‘subsActive’]
   = 1; $localizations[‘isSubscribed’] = (int) bbp_is_user_subscribed( $user_id );
   $localizations[‘subsSub’] = __( ‘Subscribe’, ‘bbpress’ ); $localizations[‘subsUns’]
   = __( ‘Unsubscribe’, ‘bbpress’ ); $localizations[‘subsLink’] = bbp_get_topic_permalink();}
   else { $localizations[‘subsActive’] = 0; }
 *  wp_localize_script( ‘bbp_topic’, ‘bbpTopicJS’, $localizations );
    } add_filter(‘
   bbp_enqueue_scripts’, ‘bbp_twentyten_topic_script_localization’ ); endif;
 * if ( !function_exists( ‘bbp_twentyten_dim_favorite’ ) ) :
    /** * Add or remove
   a topic from a user’s favorites * * [@since](https://wordpress.org/support/users/since/)
   bbPress (r2652) * * @uses bbp_get_current_user_id() To get the current user id*
   @uses current_user_can() To check if the current user can edit the user * @uses
   bbp_get_topic() To get the topic * @uses check_ajax_referer() To verify the nonce&
   check the referer * @uses bbp_is_user_favorite() To check if the topic is user’s
   favorite * @uses bbp_remove_user_favorite() To remove the topic from user’s favorites*
   @uses bbp_add_user_favorite() To add the topic from user’s favorites */ function
   bbp_twentyten_dim_favorite () { $user_id = bbp_get_current_user_id(); $id = intval(
   $_POST[‘id’] );
 *  if ( !current_user_can( ‘edit_user’, $user_id ) )
    die( ‘-1’ );
 *  if ( !$topic = bbp_get_topic( $id ) )
    die( ‘0’ );
 *  check_ajax_referer( “toggle-favorite_$topic->ID” );
 *  if ( bbp_is_user_favorite( $user_id, $topic->ID ) ) {
    if ( bbp_remove_user_favorite(
   $user_id, $topic->ID ) ) die( ‘1’ ); } else { if ( bbp_add_user_favorite( $user_id,
   $topic->ID ) ) die( ‘1’ ); }
 *  die( ‘0’ );
    } add_action( ‘wp_ajax_dim-favorite’, ‘bbp_twentyten_dim_favorite’);
   endif;
 * if ( !function_exists( ‘bbp_twentyten_dim_subscription’ ) ) :
    /** * Subscribe/
   Unsubscribe a user from a topic * * [@since](https://wordpress.org/support/users/since/)
   bbPress (r2668) * * @uses bbp_is_subscriptions_active() To check if the subscriptions
   are active * @uses bbp_get_current_user_id() To get the current user id * @uses
   current_user_can() To check if the current user can edit the user * @uses bbp_get_topic()
   To get the topic * @uses check_ajax_referer() To verify the nonce & check the
   referer * @uses bbp_is_user_subscribed() To check if the topic is in user’s *
   subscriptions * @uses bbp_remove_user_subscriptions() To remove the topic from
   user’s * subscriptions * @uses bbp_add_user_subscriptions() To add the topic 
   from user’s subscriptions */ function bbp_twentyten_dim_subscription () { if (!
   bbp_is_subscriptions_active() ) return;
 *  $user_id = bbp_get_current_user_id();
    $id = intval( $_POST[‘id’] );
 *  if ( !current_user_can( ‘edit_user’, $user_id ) )
    die( ‘-1’ );
 *  if ( !$topic = bbp_get_topic( $id ) )
    die( ‘0’ );
 *  check_ajax_referer( “toggle-subscription_$topic->ID” );
 *  if ( bbp_is_user_subscribed( $user_id, $topic->ID ) ) {
    if ( bbp_remove_user_subscription(
   $user_id, $topic->ID ) ) die( ‘1’ ); } else { if ( bbp_add_user_subscription(
   $user_id, $topic->ID ) ) die( ‘1’ ); }
 *  die( ‘0’ );
    } add_action( ‘wp_ajax_dim-subscription’, ‘bbp_twentyten_dim_subscription’);
   endif;
 * ?>
 * Let me know what you can make of it.

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The topic ‘Call to undefined function’ is closed to new replies.

## Tags

 * [troubleshoot](https://wordpress.org/support/topic-tag/troubleshoot/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 2 participants
 * Last reply from: [lowerym](https://wordpress.org/support/users/lowerym/)
 * Last activity: [10 years, 9 months ago](https://wordpress.org/support/topic/call-to-undefined-function-18/#post-6527900)
 * Status: not resolved

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