I'm trying to debug a plugin which I didn't develop and I want to list all the registered actions. I've read this SO thread:

But it's specific to one hook and it's about filters, not actions.

Is there any variable like $wp_filter or something?


Filters and actions are both assigned to hooks. Functions assigned to hooks are stored in global $wp_filter variable. So all you have to do is to print_r it.


PS. add_action function makes a add_filter call. And the latter does $wp_filter[$tag][$priority][$idx].

NOTE: you can directly add this code in functions.php, and you will see a debug on your site:

add_action('wp', function(){ echo '<pre>';print_r($GLOBALS['wp_filter']); echo '</pre>';exit; } );
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  • nice, but where can i debug them? i tried to add if(WP_DEBUG == true){ global $wp_filter; print_r($wp_filter); } in index.php nad i got NULL – Jacer Omri Jul 2 '13 at 14:57
  • my bad, shouldn't write global $wp_filter; – Jacer Omri Jul 2 '13 at 15:03
  • OK, so you worked that out? – Krzysiek Dróżdż Jul 2 '13 at 15:12

Use this plugin to show visually on a page https://wordpress.org/plugins/show-hooks/

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  • and you are the developer of that plugin, correct? – alexwc_ Aug 24 at 2:57
  • Yes, I made this plugin for myself and then host it in WordPress. – Rafiq Aug 25 at 15:59

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