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WordPress Functions.php Snippets

WPFunction.Me lets you quickly build all the functionality you need for your next WordPress project!

Theme the TinyMCE Editor

Loads a CSS file inside the editor iFrame so your preview of the content can be styled to look like the output in your theme. Just add custom-editor-style.css in your theme folder

Post/Page Thumbnails

Enable the thumbnails functionality for your theme.

Theme the login page

Loads a CSS file into your login page so you can override default styles. Just add wp-login.css into your theme folder.

Register wigetable sidebar

Let your users put loads of crap into the sidebar! You may need to tweak your theme files, read this article.

Remove Admin Bar

The admin bar on the frontend can be a bit of a pain if your using absolute / fixed positioning, or maybe you just hate it? Let's get rid of it.

Customise Admin footer

Change the message that appears in the admin footer, why not give yourself a credit for the theme?

Set max-width for Oembed objects

Define a max-width for Oembed objects such as Youtube videos.

Add posts & comments RSS feeds

Adds RSS feeds to your sites header.

Post thumbnail in RSS Feed

Adds in the post thumbnail to your RSS feed. Submitted by Claudio Schwarz

Register custom menus

Create custom editable menu areas and then use them in your theme.

Theme the admin area

Loads a CSS file into your admin area so you can override default styles. Just add wp-admin.css into your theme folder.

Custom Backgrounds

Let your users change the themes background image through 'appearance - backgrounds'.

TinyMCE Placeholder Text

Add an array of placeholder messages to the edit screen of posts or pages. Perhaps a friendly message or a reminder of how to do something. Via Ant Januska

Get more search results

By default, your search page respects the 'posts per page' set in the reading section of admin settings. Let's override that to get as many as you like.

Custom Excerpt Permalink

Removes the standard elipsis (...) that appears at the end of the_excerpt(); and replaces it with a custom message and permalink.

Add body class if there's a sidebar

Adds a has_sidebar class to the body if there's a sidebar. Use with body_class(); in your header.php file. Submitted by Andy Warburton.

Custom Thumbnail Sizes

Create a selection of custom image sizes you can pull through in your template like this: <?php the_post_thumbnail('mySize'); ?>

Separate Images & Paragraphs

Stop images getting wrapped up in paragraph tags when they get dumped out with <?php the_content(); ?>

Use Googles copy of jQuery

Grabs jQuery from Googles CDN which your visitors will hopefully have cached. This can then be called in your header with <?php wp_enqueue_script("jquery"); ?>

Custom Excerpt Length

Define how many words to return when using the_excerpt();.

HTML5 Shim only for IE

Calls Googles copy of the HTML5 shim/shiv for users on IE and only loads it if they're using IE8 or below.

Remove WP version number

Removes the version number from your header so attackers can't target known weakness's. Remember to also remove the readme.html file in your root directory which also contains this information.

Obscure Login Error Messages

Don't let people know which is incorrect: the username or password.

Disable Admin Theme Editor

Removes the code editor in the admin which allows anybody with access to modify the theme and plugin files.

// Custom CSS for the whole admin area // Create wp-admin.css in your theme folder function wpfme_adminCSS() { echo '<link rel="stylesheet" type="text/css" href="'.get_bloginfo('template_directory').'/wp-admin.css"/>'; } add_action('admin_head', 'wpfme_adminCSS');

// Theme the TinyMCE editor // You should create custom-editor-style.css in your theme folder add_editor_style('custom-editor-style.css');

// Custom CSS for the login page // Create wp-login.css in your theme folder function wpfme_loginCSS() { echo '<link rel="stylesheet" type="text/css" href="'.get_bloginfo('template_directory').'/wp-login.css"/>'; } add_action('login_head', 'wpfme_loginCSS');

// Remove the admin bar from the front end add_filter( 'show_admin_bar', '__return_false' );

// Customise the footer in admin area function wpfme_footer_admin () { echo 'Theme designed and developed by <a href="#" target="_blank">YourNameHere</a> and powered by <a href="http://wordpress.org" target="_blank">WordPress</a>.'; } add_filter('admin_footer_text', 'wpfme_footer_admin');

// Set a maximum width for Oembedded objects if ( ! isset( $content_width ) ) $content_width = 660;

// Add default posts and comments RSS feed links to head add_theme_support( 'automatic-feed-links' );

// Add custom menus register_nav_menus( array( 'primary' => __( 'Primary Navigation', 'wpfme' ), //'example' => __( 'Example Navigation', 'wpfme' ), ) );

// Enable admin to set custom background images in 'appearance > background' add_custom_background();

// Randomly chosen placeholder text for post/page edit screen function wpfme_writing_encouragement( $content ) { global $post_type; if($post_type == "post"){ $encArray = array( // Placeholders for the posts editor "Test post message one.", "Test post message two.", "<h1>Test post heading!</h1>" ); return $encArray[array_rand($encArray)]; } else{ $encArray = array( // Placeholders for the pages editor "Test page message one.", "Test page message two.", "<h1>Test Page Heading</h1>" ); return $encArray[array_rand($encArray)]; } } add_filter( 'default_content', 'wpfme_writing_encouragement' );

// Enable thumbnails add_theme_support( 'post-thumbnails' ); set_post_thumbnail_size(200, 200, true); // Normal post thumbnails

// Create custom sizes // This is then pulled through to your theme useing the_post_thumbnail('custombig'); if ( function_exists( 'add_image_size' ) ) { add_image_size('customsmall', 300, 200, true); //narrow column add_image_size('custombig', 400, 500, true); //wide column }

// Stop images getting wrapped up in p tags when they get dumped out with the_content() for easier theme styling function wpfme_remove_img_ptags($content){ return preg_replace('/<p>\s*(<a .*>)?\s*(<img .* \/>)\s*(\/a>)?\s*<\/p>/iU', '\1\2\3', $content); } add_filter('the_content', 'wpfme_remove_img_ptags');

// Call the google CDN version of jQuery for the frontend // Make sure you use this with wp_enqueue_script('jquery'); in your header function wpfme_jquery_enqueue() { wp_deregister_script('jquery'); wp_register_script('jquery', "http" . ($_SERVER['SERVER_PORT'] == 443 ? "s" : "") . "://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js", false, null); wp_enqueue_script('jquery'); } if (!is_admin()) add_action("wp_enqueue_scripts", "wpfme_jquery_enqueue", 11);

// Call Googles HTML5 Shim, but only for users on old versions of IE function wpfme_IEhtml5_shim () { global $is_IE; if ($is_IE) echo ''; } add_action('wp_head', 'wpfme_IEhtml5_shim');

// Remove the version number of WP // Warning - this info is also available in the readme.html file in your root directory - delete this file! remove_action('wp_head', 'wp_generator');

// Obscure login screen error messages function wpfme_login_obscure(){ return '<strong>Sorry</strong>: Think you have gone wrong somwhere!';} add_filter( 'login_errors', 'wpfme_login_obscure' );

// Disable the theme / plugin text editor in Admin define('DISALLOW_FILE_EDIT', true);

//custom excerpt length function wpfme_custom_excerpt_length( $length ) { //the amount of words to return return 20; } add_filter( 'excerpt_length', 'wpfme_custom_excerpt_length');

//create a permalink after the excerpt function wpfme_replace_excerpt($content) { return str_replace('[...]', '<a class="readmore" href="'. get_permalink() .'">Continue Reading</a>', $content ); } add_filter('the_excerpt', 'wpfme_replace_excerpt');

//change amount of posts on the search page - set here to 100 function wpfme_search_results_per_page( $query ) { global $wp_the_query; if ( ( ! is_admin() ) && ( $query === $wp_the_query ) && ( $query->is_search() ) ) { $query->set( 'wpfme_search_results_per_page', 100 ); } return $query; } add_action( 'pre_get_posts', 'wpfme_search_results_per_page' );

// Put post thumbnails into rss feed function wpfme_feed_post_thumbnail($content) { global $post; if(has_post_thumbnail($post->ID)) { $content = '

'.get_the_post_thumbnail($post->ID).'

' . $content; } return $content; } add_filter('the_excerpt_rss', 'wpfme_feed_post_thumbnail'); add_filter('the_content_feed', 'wpfme_feed_post_thumbnail');

function wpfme_has_sidebar($classes) { if (is_active_sidebar('sidebar')) { // add 'class-name' to the $classes array $classes[] = 'has_sidebar'; } // return the $classes array return $classes; } add_filter('body_class','wpfme_has_sidebar');