I have been trying to write a reusable modular options class and I am stuck at this specific point.

How do i define hooks within php classes?

Try 1 :

class super_options {
     // ..........................

       function render_options_page ()


     // ..........................

        function top_page_hook() {
             do_action( array( &$this, 'top_page_hook') );


and when hooking to the above, add_action( array( &$plugs, 'top_page_hook' ), 'stuff_for_top_hook' );

This doesn't work.

Try 2 :

  • Replacing the $this->top_page_hook();, with do_action( 'top_page_hook' );
  • Calling add_action( 'top_page_hook', 'stuff_for_top_hook' );
  • Works, but the class loses its reusability.

So how do i take care of this? Please share your wisdom. Thanks.


Hook can only be identified by string. So the only option to have dynamic hook is is use some variable(s) in its name:

do_action( $some_string_variable . '_top_page_hook' );

Depending on what you are trying to do this can be something meaningful (like prefix, defined by configuration) or something randomly generated to be unique ID (not so common).

  • Exactly. You only pass in the class when you call add_action() so you can avoid name collisions with function names. do_action() just takes the string name for the action (well, and additional variables you're passing along, but that's beyond the scope of your question). – EAMann Aug 26 '11 at 21:30
  • That works perfectly. I already have a property $this->page_prefix, so $this->page_prefix . '_top_page_hook' does the job. Thanks a lot. – OpenOne Aug 26 '11 at 21:39

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