Best collection of code for your ‘functions.php’ file

February 12, 20233 Views

As with many others who are now viewing this post, I have been reading various blogs, forums, and discussion groups to learn and improve my WordPress skills. Over the past 12 months I have been on a mission to substitute my use of plugins by adding code to my functions.php file instead.

While I completely agree that plugins are very useful in many situations, my experience proved that in 90% of usage cases although a plugin might exist, actually utilizing it could create unnecessary complications and compatibility issues. Additionally in a great deal of cases such plugins added menus and other admin elements which I don’t want or need.

More often than not I have found that by analyzing the code of plugins I was able to strip out the piece of code I wanted and hard code it into my functions.php. This provided me with the exact functionality I needed without having to include unnecessary elements.

So, the purpose of this post is my attempt to engage you, the reader/admin/developer, to share with me and other here any code bits which you find useful and have added to your theme’s function.php file to extend or enhance WordPress without utilizing a plugin.

When you submit a response here please kindly give each code bit a title, let us know if with what version of WordPress you know its compatible with, include whatever description you feel best describes its function and (if applicable) include a link to the original plugin or source where you found the information.

I am looking forward to all your responses and will of course continually add my own new finds whenever I find them.

_{Please vote on the question and any answers you find useful by clicking on the up arrow on the left hand side of the question or answer.}

Post Views: 3

19 comments

Anonymous says:

February 12, 2023 at 1:32 pm
Enable Hidden Administration Feature displaying All Site Settings

Tested on: WordPress 3.1 RC3

This little piece of code does something pretty cool. It will add an additional option to your settings menu with a link to “all settings” which will show you a complete list of all the settings you have within your database related to your WordPress site. The code below will only made this link visible to an administrator user and hide it for all other users.
```
// CUSTOM ADMIN MENU LINK FOR ALL SETTINGS
   function all_settings_link() {
    add_options_page(__('All Settings'), __('All Settings'), 'administrator', 'options.php');
   }
   add_action('admin_menu', 'all_settings_link');
```
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Modify the Login Logo & Image URL Link

Tested on: WordPress 3.0.1

This code will allow you to easily modify the WordPress Login page Logo as well as the href link and title text of this logo.

add_filter( 'login_headerurl', 'namespace_login_headerurl' );
/**
 * Replaces the login header logo URL
 *
 * @param $url
 */
function namespace_login_headerurl( $url ) {
    $url = home_url( '/' );
    return $url;
}

add_filter( 'login_headertitle', 'namespace_login_headertitle' );
/**
 * Replaces the login header logo title
 *
 * @param $title
 */
function namespace_login_headertitle( $title ) {
    $title = get_bloginfo( 'name' );
    return $title;
}

add_action( 'login_head', 'namespace_login_style' );
/**
 * Replaces the login header logo
 */
function namespace_login_style() {
    echo '<style>.login h1 a { background-image: url( ' . get_template_directory_uri() . '/images/logo.png ) !important; }</style>';
}

EDIT: If you want to use the site logo to replace the login logo, you can use the following to dynamically pull that information (tested on WP3.5):

function namespace_login_style() {
    if( function_exists('get_custom_header') ){
        $width = get_custom_header()->width;
        $height = get_custom_header()->height;
    } else {
        $width = HEADER_IMAGE_WIDTH;
        $height = HEADER_IMAGE_HEIGHT;
    }
    echo '<style>'.PHP_EOL;
    echo '.login h1 a {'.PHP_EOL; 
    echo '  background-image: url( '; header_image(); echo ' ) !important; '.PHP_EOL;
    echo '  width: '.$width.'px !important;'.PHP_EOL;
    echo '  height: '.$height.'px !important;'.PHP_EOL;
    echo '  background-size: '.$width.'px '.$height.'px !important;'.PHP_EOL;
    echo '}'.PHP_EOL;
    echo '</style>'.PHP_EOL;
}

Include custom post types in the search results.

// MAKE CUSTOM POST TYPES SEARCHABLE
function searchAll( $query ) {
 if ( $query->is_search ) { $query->set( 'post_type', array( 'site', 'plugin', 'theme', 'person' )); } 
 return $query;
}
add_filter( 'the_search_query', 'searchAll' );

Add your custom post types to your sites main RSS feed by default.

// ADD CUSTOM POST TYPES TO THE DEFAULT RSS FEED
function custom_feed_request( $vars ) {
 if (isset($vars['feed']) && !isset($vars['post_type']))
  $vars['post_type'] = array( 'post', 'site', 'plugin', 'theme', 'person' );
 return $vars;
}
add_filter( 'request', 'custom_feed_request' );

Include custom post types in “Right Now” admin dashboard widget

This will include your custom post types and the post counts for each type in the “Right Now” dashboard widget.

// ADD CUSTOM POST TYPES TO THE 'RIGHT NOW' DASHBOARD WIDGET
function wph_right_now_content_table_end() {
 $args = array(
  'public' => true ,
  '_builtin' => false
 );
 $output = 'object';
 $operator = 'and';
 $post_types = get_post_types( $args , $output , $operator );
 foreach( $post_types as $post_type ) {
  $num_posts = wp_count_posts( $post_type->name );
  $num = number_format_i18n( $num_posts->publish );
  $text = _n( $post_type->labels->singular_name, $post_type->labels->name , intval( $num_posts->publish ) );
  if ( current_user_can( 'edit_posts' ) ) {
   $num = "<a href='edit.php?post_type=$post_type->name'>$num</a>";
   $text = "<a href='edit.php?post_type=$post_type->name'>$text</a>";
  }
  echo '<tr><td class="first num b b-' . $post_type->name . '">' . $num . '</td>';
  echo '<td class="text t ' . $post_type->name . '">' . $text . '</td></tr>';
 }
 $taxonomies = get_taxonomies( $args , $output , $operator ); 
 foreach( $taxonomies as $taxonomy ) {
  $num_terms  = wp_count_terms( $taxonomy->name );
  $num = number_format_i18n( $num_terms );
  $text = _n( $taxonomy->labels->singular_name, $taxonomy->labels->name , intval( $num_terms ));
  if ( current_user_can( 'manage_categories' ) ) {
   $num = "<a href='edit-tags.php?taxonomy=$taxonomy->name'>$num</a>";
   $text = "<a href='edit-tags.php?taxonomy=$taxonomy->name'>$text</a>";
  }
  echo '<tr><td class="first b b-' . $taxonomy->name . '">' . $num . '</td>';
  echo '<td class="t ' . $taxonomy->name . '">' . $text . '</td></tr>';
 }
}
add_action( 'right_now_content_table_end' , 'wph_right_now_content_table_end' );

Remove Update Notification for all users except ADMIN User

Tested on: WordPress 3.0.1

This code will ensures that no users other than “admin” are notified by WordPress when updates are available..

// REMOVE THE WORDPRESS UPDATE NOTIFICATION FOR ALL USERS EXCEPT SYSADMIN
   global $user_login;
   get_currentuserinfo();
   if ($user_login !== "admin") { // Change admin to the username that gets the updates
    add_action( 'init', create_function( '$a', "remove_action( 'init', 'wp_version_check' );" ), 2 );
    add_filter( 'pre_option_update_core', create_function( '$a', "return null;" ) );
   }

Changed version to only show update notification for admin users (as opposed to just the user ‘admin’):

// REMOVE THE WORDPRESS UPDATE NOTIFICATION FOR ALL USERS EXCEPT SYSADMIN
       global $user_login;
       get_currentuserinfo();
       if (!current_user_can('update_plugins')) { // Checks to see if current user can update plugins
        add_action( 'init', create_function( '$a', "remove_action( 'init', 'wp_version_check' );" ), 2 );
        add_filter( 'pre_option_update_core', create_function( '$a', "return null;" ) );
       }

Loading jQuery from the Google CDN

Tested on: WordPress 3.0.1

// Even more smart jQuery inclusion :)
add_action( 'init', 'jquery_register' );

// Register from Google and for footer
function jquery_register() {

    if ( !is_admin() ) {

        wp_deregister_script( 'jquery' );
        wp_register_script( 'jquery', ( 'https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js' ), false, null, true );
        wp_enqueue_script( 'jquery' );
    }
}

Remove the WordPress Version Info for Security

Tested on: WordPress 3.0.1

// Remove version info from head and feeds
function complete_version_removal() {
    return '';
}
add_filter('the_generator', 'complete_version_removal');

Add Spam & Delete Links to Comments on Front End

Tested on: WordPress 3.0.1

This makes it way easier to manage comments from the front end by adding spam and delete links.**

// Spam & delete links for all versions of WordPress
function delete_comment_link($id) {
    if (current_user_can('edit_post')) {
        echo '| <a href="'.get_bloginfo('wpurl').'/wp-admin/comment.php?action=cdc&c='.$id.'">del</a> ';
        echo '| <a href="'.get_bloginfo('wpurl').'/wp-admin/comment.php?action=cdc&dt=spam&c='.$id.'">spam</a>';
    }
}

Delay the public posting to RSS Feed

Tested on: WordPress 3.0.1

Finally, I like to delay posting to my RSS feeds for 10-15 minutes because I always find at least a couple errors in my text. Other uses are in case you want content to be exclusive to your site for a day or a week before pushing it out to your RSS readers.

// Delay feed update
function publish_later_on_feed($where) {
    global $wpdb;

    if (is_feed()) {
        // Timestamp in WordPress format
        $now = gmdate('Y-m-d H:i:s');

        // Value for wait; + device
        $wait = '10'; // integer

        // http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_timestampdiff
        $device = 'MINUTE'; // MINUTE, HOUR, DAY, WEEK, MONTH, YEAR

        // Add SQL syntax to default $where
        $where .= " AND TIMESTAMPDIFF($device, $wpdb->posts.post_date_gmt, '$now') > $wait ";
    }
    return $where;
}
add_filter('posts_where', 'publish_later_on_feed');

Anonymous says:

February 12, 2023 at 1:32 pm
Set a maximum number of post revisions to avoid DB bloat.

Tested on: WordPress 3.0.1

The default is infinite, and this will set it to only remember the last five edits:
```
/**
 * Set the post revisions unless the constant was set in wp-config.php
 */
if (!defined('WP_POST_REVISIONS')) define('WP_POST_REVISIONS', 5);
```
For what it’s worth, there are a ton of great ideas for CONSTANTS that can be set on the Codex page Editing wp-config.php.
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WordPress Profiling tools

I like to add profiling tools in a separate file, which I then include from functions.php when needed:

<?php
    if ( !defined('SAVEQUERIES') && isset($_GET['debug']) && $_GET['debug'] == 'sql' )
        define('SAVEQUERIES', true);

    if ( !function_exists('dump') ) :
        /**
         * dump()
         *
         * @param mixed $in
         * @return mixed $in
         **/

        function dump($in = null) {
            echo '<pre style="margin-left: 0px; margin-right: 0px; padding: 10px; border: solid 1px black; background-color: ghostwhite; color: black; text-align: left;">';
            foreach ( func_get_args() as $var ) {
                echo "n";
                if ( is_string($var) ) {
                    echo "$varn";
                } else {
                    var_dump($var);
                }
            }
            echo '</pre>' . "n";
            return $in;
        } # dump()
    endif;

    /**
     * add_stop()
     *
     * @param mixed $in
     * @param string $where
     * @return mixed $in
     **/

    function add_stop($in = null, $where = null) {
        global $sem_stops;
        global $wp_object_cache;
        $queries = get_num_queries();
        $milliseconds = timer_stop() * 1000;
        $out =  "$queries queries - {$milliseconds}ms";
        if ( function_exists('memory_get_usage') ) {
            $memory = number_format(memory_get_usage() / ( 1024 * 1024 ), 1);
            $out .= " - {$memory}MB";
        }
        $out .= " - $wp_object_cache->cache_hits cache hits / " . ( $wp_object_cache->cache_hits + $wp_object_cache->cache_misses );
        if ( $where ) {
            $sem_stops[$where] = $out;
        } else {
            dump($out);
        }
        return $in;
    } # add_stop()


    /**
     * dump_stops()
     *
     * @param mixed $in
     * @return mixed $in
     **/

    function dump_stops($in = null) {

        if ( $_POST )
            return $in;

        global $sem_stops;
        global $wp_object_cache;
        $stops = '';

        foreach ( $sem_stops as $where => $stop )
            $stops .= "$where: $stopn";

        dump("n" . trim($stops) . "n");

        if ( defined('SAVEQUERIES') && $_GET['debug'] == 'sql' ) {
            global $wpdb;
            foreach ( $wpdb->queries as $key => $data ) {
                $query = rtrim($data[0]);
                $duration = number_format($data[1] * 1000, 1) . 'ms';
                $loc = trim($data[2]);
                $loc = preg_replace("/(require|include)(_once)?,s*/ix", '', $loc);
                $loc = "n" . preg_replace("/,s*/", ",n", $loc) . "n";
                dump($query, $duration, $loc);
            }
        }

        if ( $_GET['debug'] == 'cache' )
            dump($wp_object_cache->cache);

        if ( $_GET['debug'] == 'cron' ) {
            $crons = get_option('cron');

            foreach ( $crons as $time => $_crons ) {

                if ( !is_array($_crons) )
                    continue;

                foreach ( $_crons as $event => $_cron ) {
                    foreach ( $_cron as $details ) {
                        $date = date('Y-m-d H:m:i', $time);
                        $schedule = isset($details['schedule']) ? "({$details['schedule']})" : '';
                        if ( $details['args'] )
                            dump("$date: $event $schedule", $details['args']);
                        else
                            dump("$date: $event $schedule");
                    }
                }
            }
        }
        return $in;
    } # dump_stops()
    add_action('init', create_function('$in', '
        return add_stop($in, "Load");
        '), 10000000);
    add_action('template_redirect', create_function('$in', '
        return add_stop($in, "Query");
        '), -10000000);
    add_action('wp_footer', create_function('$in', '
        return add_stop($in, "Display");
        '), 10000000);
    add_action('admin_footer', create_function('$in', '
        return add_stop($in, "Display");
        '), 10000000);

    /**
     * init_dump()
     *
     * @return void
     **/

    function init_dump() {
        global $hook_suffix;
        if ( !is_admin() || empty($hook_suffix) ) {
            add_action('wp_footer', 'dump_stops', 10000000);
            add_action('admin_footer', 'dump_stops', 10000000);
        } else {
            add_action('wp_footer', 'dump_stops', 10000000);
            add_action("admin_footer-$hook_suffix", 'dump_stops', 10000000);
        }
    } # init_dump()
    add_action('wp_print_scripts', 'init_dump');


    /**
     * dump_phpinfo()
     *
     * @return void
     **/

    function dump_phpinfo() {
        if ( isset($_GET['debug']) && $_GET['debug'] == 'phpinfo' ) {
            phpinfo();
            die;
        }
    } # dump_phpinfo()
    add_action('init', 'dump_phpinfo');


    /**
     * dump_http()
     *
     * @param array $args
     * @param string $url
     * @return array $args
     **/

    function dump_http($args, $url) {
        dump(preg_replace("|/[0-9a-f]{32}/?$|", '', $url));
        return $args;
    } # dump_http()


    /**
     * dump_trace()
     *
     * @return void
     **/

    function dump_trace() {
        $backtrace = debug_backtrace();
        foreach ( $backtrace as $trace )
            dump(
                'File/Line: ' . $trace['file'] . ', ' . $trace['line'],
                'Function / Class: ' . $trace['function'] . ', ' . $trace['class']
                );
    } # dump_trace()
    if ( $_GET['debug'] == 'http' )
        add_filter('http_request_args', 'dump_http', 0, 2);
?>

Sharpen Resized Images (only JPEG)

This function sharpens resized JPEG images. An example of a difference:

function ajx_sharpen_resized_files( $resized_file ) {

    $image = wp_load_image( $resized_file );
    if ( !is_resource( $image ) )
        return new WP_Error( 'error_loading_image', $image, $file );

    $size = @getimagesize( $resized_file );
    if ( !$size )
        return new WP_Error('invalid_image', __('Could not read image size'), $file);
    list($orig_w, $orig_h, $orig_type) = $size;

    switch ( $orig_type ) {

        case IMAGETYPE_JPEG:
            $matrix = array(
                array(-1, -1, -1),
                array(-1, 16, -1),
                array(-1, -1, -1),
            );

            $divisor = array_sum(array_map('array_sum', $matrix));
            $offset = 0;
            imageconvolution($image, $matrix, $divisor, $offset);
            imagejpeg($image, $resized_file,apply_filters( 'jpeg_quality', 90, 'edit_image' ));
            break;

        case IMAGETYPE_PNG:
            return $resized_file;

        case IMAGETYPE_GIF:
            return $resized_file;
    }

    return $resized_file;
}

add_filter('image_make_intermediate_size', 'ajx_sharpen_resized_files', 900);

Remove Default WordPress Meta Boxes

Tested on: WordPress 3.0.1

This code will allow you to remove specific Meta Boxes which WordPress adds by default to the default Add/Edit Post and Add/Edit Page screens.

// REMOVE META BOXES FROM DEFAULT POSTS SCREEN
function remove_default_post_screen_metaboxes() {
    remove_meta_box( 'postcustom','post','normal' ); // Custom Fields Metabox
    remove_meta_box( 'postexcerpt','post','normal' ); // Excerpt Metabox
    remove_meta_box( 'commentstatusdiv','post','normal' ); // Comments Metabox
    remove_meta_box( 'trackbacksdiv','post','normal' ); // Talkback Metabox
    remove_meta_box( 'slugdiv','post','normal' ); // Slug Metabox
    remove_meta_box( 'authordiv','post','normal' ); // Author Metabox
}
add_action('admin_menu', 'remove_default_post_screen_metaboxes');


// REMOVE META BOXES FROM DEFAULT PAGES SCREEN
function remove_default_page_screen_metaboxes() {
    remove_meta_box( 'postcustom','page','normal' ); // Custom Fields Metabox
    remove_meta_box( 'postexcerpt','page','normal' ); // Excerpt Metabox
    remove_meta_box( 'commentstatusdiv','page','normal' ); // Comments Metabox
    remove_meta_box( 'trackbacksdiv','page','normal' ); // Talkback Metabox
    remove_meta_box( 'slugdiv','page','normal' ); // Slug Metabox
    remove_meta_box( 'authordiv','page','normal' ); // Author Metabox
}
add_action('admin_menu', 'remove_default_page_screen_metaboxes');

Anonymous says:

February 12, 2023 at 1:32 pm
Remove “WordPress” to “WordPress” filter

Tested on: WordPress 3.0.1

There was a filter added with WordPress version 3.0 that automatically converts all instances of “WordPress” (no capital P) to “WordPress” (with a capital P) in post content, post titles, and comment text. Some people see this as intrusive, but I just have a need to mis-case WordPress from time to time and found the filter somewhat annoying.
```
// Remove annoying P filter
if(function_exists('capital_P_dangit')) {
    foreach ( array( 'the_content', 'the_title' ) as $filter )
        remove_filter( $filter, 'capital_P_dangit', 11 );

    remove_filter('comment_text', 'capital_P_dangit', 31 );
}
```
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Customize the Dashboard

add_action('wp_dashboard_setup', 'my_custom_dashboard_widgets');

function my_custom_dashboard_widgets() {
   global $wp_meta_boxes;

Remove these dashboard widgets…

   unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);
   unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);
   unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);

Add a custom widget called ‘Help and Support’

   wp_add_dashboard_widget('custom_help_widget', 'Help and Support', 'custom_dashboard_help');
}

This is the content for your custom widget

 function custom_dashboard_help() {
    echo '<p>Lorum ipsum delor sit amet et nunc</p>';
}

Add Custom User Profile Fields

Place the code below into your functions.php file to add custom user profile fields. Edit or add lines as you see fit.

Remember not to remove the line: return $contactmethods; otherwise this won’t work.

// CUSTOM USER PROFILE FIELDS
   function my_custom_userfields( $contactmethods ) {

    // ADD CONTACT CUSTOM FIELDS
    $contactmethods['contact_phone_office']     = 'Office Phone';
    $contactmethods['contact_phone_mobile']     = 'Mobile Phone';
    $contactmethods['contact_office_fax']       = 'Office Fax';

    // ADD ADDRESS CUSTOM FIELDS
    $contactmethods['address_line_1']       = 'Address Line 1';
    $contactmethods['address_line_2']       = 'Address Line 2 (optional)';
    $contactmethods['address_city']         = 'City';
    $contactmethods['address_state']        = 'State';
    $contactmethods['address_zipcode']      = 'Zipcode';
    return $contactmethods;
   }
   add_filter('user_contactmethods','my_custom_userfields',10,1);

To display custom fields you can use one of the two methods listed below.

Option 1:

the_author_meta('facebook', $current_author->ID)

Option 2:

<?php $current_author = get_userdata(get_query_var('author')); ?>
<p><a href="<?php echo esc_url($current_author->contact_phone_office);?>" title="office_phone"> Office Phone</a></p>

Anonymous says:

February 12, 2023 at 1:33 pm
Function to change the length of Exerpt

Tested on: WordPress 3.0.1

By default all excerpts are capped at 55 words. Utilizing the code below you can override this default settings:
```
function new_excerpt_length($length) { 
    return 100;
}

add_filter('excerpt_length', 'new_excerpt_length');
```
This example changes the excerpt length to 100 words, but you can use the same method to change it to any value.
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Customize the order of the administration menu

Tested on: WordPress 3.0.1

This code will allow you to reorganize the order of elements in the administration menu. All that you need to do is click on an existing link in the administration menu and copy everything before the /wp-admin/ URL. The order below represents the order the new administration menu will have.

// CUSTOMIZE ADMIN MENU ORDER
function custom_menu_order($menu_ord) {
    if (!$menu_ord)
        return true;
    return array(
     'index.php', // This represents the dashboard link
     'edit.php?post_type=events', // This is a custom post type menu
     'edit.php?post_type=news',
     'edit.php?post_type=articles',
     'edit.php?post_type=faqs',
     'edit.php?post_type=mentors',
     'edit.php?post_type=testimonials',
     'edit.php?post_type=services',
     'edit.php?post_type=page', // This is the default page menu
     'edit.php', // This is the default POST admin menu
 );
}
add_filter('custom_menu_order', 'custom_menu_order');
add_filter('menu_order', 'custom_menu_order');

Add Thumbnails in Manage Posts/Pages List

You can add this to your functions to display to the Manage/Edit Post and Pages List a new column with the thumbnail preview.

/****** Add Thumbnails in Manage Posts/Pages List ******/
if ( !function_exists('AddThumbColumn') && function_exists('add_theme_support') ) {
 
    // for post and page
    add_theme_support('post-thumbnails', array( 'post', 'page' ) );
 
    function AddThumbColumn($cols) {
 
        $cols['thumbnail'] = __('Thumbnail');
 
        return $cols;
    }
 
    function AddThumbValue($column_name, $post_id) {
 
            $width = (int) 35;
            $height = (int) 35;
 
            if ( 'thumbnail' == $column_name ) {
                // thumbnail of WP 2.9
                $thumbnail_id = get_post_meta( $post_id, '_thumbnail_id', true );
                // image from gallery
                $attachments = get_children( array('post_parent' => $post_id, 'post_type' => 'attachment', 'post_mime_type' => 'image') );
                if ($thumbnail_id)
                    $thumb = wp_get_attachment_image( $thumbnail_id, array($width, $height), true );
                elseif ($attachments) {
                    foreach ( $attachments as $attachment_id => $attachment ) {
                        $thumb = wp_get_attachment_image( $attachment_id, array($width, $height), true );
                    }
                }
                    if ( isset($thumb) && $thumb ) {
                        echo $thumb;
                    } else {
                        echo __('None');
                    }
            }
    }
 
    // for posts
    add_filter( 'manage_posts_columns', 'AddThumbColumn' );
    add_action( 'manage_posts_custom_column', 'AddThumbValue', 10, 2 );
 
    // for pages
    add_filter( 'manage_pages_columns', 'AddThumbColumn' );
    add_action( 'manage_pages_custom_column', 'AddThumbValue', 10, 2 );
}

Remove pings to your own blog

Tested on: WordPress 3.0.1

// Remove pings to self
function no_self_ping( &$links ) {
    $home = get_option( 'home' );
    foreach ( $links as $l => $link )
        if ( 0 === strpos( $link, $home ) )
            unset($links[$l]);
}
add_action( 'pre_ping', 'no_self_ping' );

Anonymous says:

February 12, 2023 at 1:33 pm
Enable GZIP output compression

Normally the server should be set up to do this automatically, but a lot of shared hosts donât do this (probably to increase client bandwidth usage).
```
 if(extension_loaded("zlib") && (ini_get("output_handler") != "ob_gzhandler"))
   add_action('wp', create_function('', '@ob_end_clean();@ini_set("zlib.output_compression", 1);'));
```
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Display DB Queries, Time Spent and Memory Consumption

Tested on: WordPress 3.0.1

function performance( $visible = false ) {

    $stat = sprintf( '%d queries in %.3f seconds, using %.2fMB memory',
            get_num_queries(),
            timer_stop( 0, 3 ),
            memory_get_peak_usage() / 1024 / 1024
        );

    echo $visible ? $stat : "<!-- {$stat} -->" ;
}

Then this code below the code above which will automatically insert the code above into the footer of your public website (make sure your theme is calling wp_footer):

add_action( 'wp_footer', 'performance', 20 );

It can be called multiple times.

Unregister WordPress Default Widgets

Tested on: WordPress 3.0.1

// Unregister all default WordPress Widgets
function unregister_default_wp_widgets() {
    unregister_widget('WP_Widget_Pages');
    unregister_widget('WP_Widget_Calendar');
    unregister_widget('WP_Widget_Archives');
    unregister_widget('WP_Widget_Links');
    unregister_widget('WP_Widget_Meta');
    unregister_widget('WP_Widget_Search');
    unregister_widget('WP_Widget_Text');
    unregister_widget('WP_Widget_Categories');
    unregister_widget('WP_Widget_Recent_Posts');
    unregister_widget('WP_Widget_Recent_Comments');
    unregister_widget('WP_Widget_RSS');
    unregister_widget('WP_Widget_Tag_Cloud');
}
add_action('widgets_init', 'unregister_default_wp_widgets', 1);

Best collection of code for your ‘functions.php’ file

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19 comments

Enable Hidden Administration Feature displaying All Site Settings

Modify the Login Logo & Image URL Link

Include custom post types in the search results.

Remove Update Notification for all users except ADMIN User

Loading jQuery from the Google CDN

Remove the WordPress Version Info for Security

Add Spam & Delete Links to Comments on Front End

Delay the public posting to RSS Feed

Set a maximum number of post revisions to avoid DB bloat.

WordPress Profiling tools

Sharpen Resized Images (only JPEG)

Remove Default WordPress Meta Boxes

Remove “WordPress” to “WordPress” filter

Customize the Dashboard

Add Custom User Profile Fields

Function to change the length of Exerpt

Customize the order of the administration menu

Add Thumbnails in Manage Posts/Pages List

Remove pings to your own blog

Enable GZIP output compression

Display DB Queries, Time Spent and Memory Consumption

Unregister WordPress Default Widgets

Social Network

Related posts

Leave a Reply Cancel reply

19 comments

Enable Hidden Administration Feature displaying All Site Settings

Modify the Login Logo & Image URL Link

Include custom post types in the search results.

Remove Update Notification for all users except ADMIN User

Loading jQuery from the Google CDN

Remove the WordPress Version Info for Security

Add Spam & Delete Links to Comments on Front End

Delay the public posting to RSS Feed

Set a maximum number of post revisions to avoid DB bloat.

WordPress Profiling tools

Sharpen Resized Images (only JPEG)

Remove Default WordPress Meta Boxes

Remove “WordPress” to “WordPress” filter

Customize the Dashboard

Add Custom User Profile Fields

Function to change the length of Exerpt

Customize the order of the administration menu

Add Thumbnails in Manage Posts/Pages List

Remove pings to your own blog

Enable GZIP output compression

Display DB Queries, Time Spent and Memory Consumption

Unregister WordPress Default Widgets

Social Network