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.
Example:
PHP
// 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');
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.
Tested on: WordPress 3.0.1
Example:
PHP
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>';
}
Example:
PHP
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;
}
This code will ensures that no users other than "admin" are notified by WordPress when updates are available..
Example:
PHP
// 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;" ) );
}
Example:
PHP
// 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;" ) );
}
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.
Example:
PHP
// 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');
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.
Example:
PHP
// Remove annoying P filter
if(function_exists('capital_P_dangit')) {
foreach ( array( 'the_content', 'the_title' ) as $filter )
remove_filter( $filter, 'capital_P_dangit', 11 );
remove_filter('comment_text', 'capital_P_dangit', 31 );
}
This code will allow you to reorganize the order of elements in the administration menu. All that you need to do is click on an existing link in the administration menu and copy everything before the /wp-admin/ URL. The order below represents the order the new administration menu will have.
Example:
PHP
// CUSTOMIZE ADMIN MENU ORDER
function custom_menu_order($menu_ord) {
if (!$menu_ord)
return true;
return array(
'index.php', // This represents the dashboard link
'edit.php?post_type=events', // This is a custom post type menu
'edit.php?post_type=news',
'edit.php?post_type=articles',
'edit.php?post_type=faqs',
'edit.php?post_type=mentors',
'edit.php?post_type=testimonials',
'edit.php?post_type=services',
'edit.php?post_type=page', // This is the default page menu
'edit.php', // This is the default POST admin menu
);
}
add_filter('custom_menu_order', 'custom_menu_order');
add_filter('menu_order', 'custom_menu_order');
You can add this to your functions to display to the Manage/Edit Post and Pages List a new column with the thumbnail preview.
Just copy and paste following codes to yourdomain.com/wp-content/themes/activated-theme/fucntions.php in the most below.
Example:
PHP
/****** Add Thumbnails in Manage Posts/Pages List ******/
if ( !function_exists('AddThumbColumn') && function_exists('add_theme_support') ) {
// for post and page
add_theme_support('post-thumbnails', array( 'post', 'page' ) );
function AddThumbColumn($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 );
}