Sarathlal N

Display all hooks sequentialy that run on a page - WordPress

Debugging WordPress code is an interesting job. If the issue is too complicated, finding the cause is an awesome activity.

As a technical support in a development company, often I have to face such issue. Our clients always will come with some interesting bugs. Almost, the cause is not from our plugin or theme. But we have responsibility to find out the cause.

In such situations, getting an idea about all hooks that run on that WordPress page helped me a lot. Below you can find the function that I’m using for debugging.

add_action( 'all', 'th_show_all_hooks' );
	
function th_show_all_hooks( $tag ) {
	if(!(is_admin())){ // Display Hooks in front end pages only
		$debug_tags = array();
		global $debug_tags;
		if ( in_array( $tag, $debug_tags ) ) {
			return;
		}
		echo "<pre>" . $tag . "</pre>";
		$debug_tags[] = $tag;
	}
}

You can use above code in your theme’s functions.php file or in your custom plugin file. Now this code only display hooks in front end pages. To track hooks in backend, just update the conditional tag.

Note: This function only works in server with PHP 5.3+ versions and a global variable is used (It consider as bad practice).

Recent Posts

  1. Redirect single pages of post type in to post type archive page - WordPress
  2. Get details about available image sizes - WordPress
  3. Change shipping and billing address title - WooCommerce
  4. Add phone number to the output of the addresses on the "My Account" page - WooCommerce
  5. Conditional tags for order thank you page - WooCommerce

Your Questions / Comments

If you found this article interesting, found errors, or just want to discuss about them, please get in touch.