How to get a nice list of all hooked functions in WordPress?

The following code is very useful when debugging or fiddling around with hook priorities. Knowing what’s hooked into wp_head() in what order is important, and this function is a great asset!

function list_hooked_functions($tag=false){
	global $wp_filter;
	if ($tag) {
		$hook[$tag]=$wp_filter[$tag];
		if (!is_array($hook[$tag])) {
			trigger_error("Nothing found for '$tag' hook", E_USER_WARNING);
			return;
		}
	}
	else {
		$hook=$wp_filter;
		ksort($hook);
	}

	echo '<pre>';

	foreach($hook as $tag => $priority){
		echo "<br />&gt;&gt;&gt;&gt;&gt;t<strong>$tag</strong><br />";
		ksort($priority);
		foreach($priority as $priority => $function){
			echo $priority;
			foreach($function as $name => $properties) {
				echo "t$name<br />";
			}
		}
	}
	echo '</pre>';
	return;
}

 

Disable Admin Bar for All Users Except for Administrators

To disable admin bar for all groups of users except admin, just paste the following code in your theme’s functions.php file.

add_action('after_setup_theme', 'remove_admin_bar');

function remove_admin_bar() {
if (!current_user_can('administrator') && !is_admin()) {
  show_admin_bar(false);
}
}

easy-peasy ;)

Displaying Child Pages on the Parent Page in WP with a shortcode

To display child pages on a parent page in WordPress just edit theme’s functions.php file and and the following code:

 global $post;
if ( is_page() &amp;&amp; $post-&gt;post_parent )
$childpages = wp_list_pages( 'sort_column=menu_order&amp;title_li=&amp;child_of=' . $post-&gt;post_parent . '&amp;echo=0' );
else
$childpages = wp_list_pages( 'sort_column=menu_order&amp;title_li=&amp;child_of=' . $post-&gt;ID . '&amp;echo=0' );
if ( $childpages ) {
$string = '</code>
<ul>' . $childpages . '</ul>
';
}
return $string;
}
add_shortcode('wpb_childpages', 'wpb_list_child_pages');

Then add the [wpb_childpages] shortcode wherever you need to display child pages. ;)

If you need to Display Child Pages Without Any Shortcode dinamically, you need to add this line of code where you want to display child pages:

The theme will now automatically detect child pages and display them.