add_action in functions.php, do_action in plugin?

1 comment

1. Shot in the dark here, but…

   It is entirely possible the plugin with the do_action definition is hooked before the theme is processed.

   Find out where the do_action is defined, and find out when it is being hooked.

   You might need to hook to the function that the do_action definition is hooked too, and THEN hook to that action definition.

   Example:

   Open the plugin file that has the do_action definition you are trying to hook to with your custom function.

   Look to see if the do_action definition resides within a plugin function.

   If so, look through the plugin to find an add_action() reference of that particular function name containing the do_action definition.

   Note down what that hook is.

   Now, you know when WordPress calls that plugin’s function containing the do_action definition.

   So now in your theme functions.php file, you might have something similar to the following code:

   /**
    * This is the WordPress action the plugin's do_action function definition is 
    * hooked to.
    *
    * Example: This hook could be anything. I'm not saying the hook will be: "plugins_loaded" 
    * for sure, but if it was "plugins_loaded"... After WordPress loads and instantiates all 
    * of it's activated plugins, WordPress will fire the plugin's function containing the 
    * plugin's do_action definition (As long as the plugin you are trying to work with is 
    * activated). So you're getting on the same level as the plugin when it needs WordPress to 
    * execute this particular defined custom action and telling WordPress that your theme function
    * needs to be on that same level as well, before it can hook to your plugin's do_action reference.
    */
   add_action('plugins_loaded', 'wpse_setup_theme');
   function wpse_setup_theme(){
       /**
        * This your function that you want fired then the do_action is executed.
        *
        * Example: If the plugin file has a function named osmosis_jones() and 
        * inside osmosis_jones(), there is a do_action() reference. Note down 
        * the do_action tag name inside the osmosis_jones() function.
        */
       add_action('the_plugin_do_action_tag_name', 'wpse_display_theme_header');
   }
   
   function wpse_display_theme_header(){
       echo 'THEME HEADER HERE!';
   }
   

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