How can I see all the actions attached to an “add_action” hook?

The question:

I’m working with the admin bar and trying to debug some of the menus and their priorities.

I know several callbacks get bound to actions, such as this one:

add_action( 'admin_bar_menu', 'wp_admin_bar_wp_menu', 10 );

How can I see what is lined up to be called when a hook like admin_bar_menu is called?

The Solutions:

Below are the methods you can try. The first solution is probably the best. Try others if the first one doesn’t work. Senior developers aren’t just copying/pasting – they read the methods carefully & apply them wisely to each case.

Method 1

You can see the detailed list of the hook using this snippet:

$hook_name = 'admin_bar_menu';
global $wp_filter;
var_dump( $wp_filter[$hook_name] );

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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