Clarkson Hooks

Solution for 'Just in time' WordPress Hooks.

Clarkson-hooks combines the all action and composer autoloading to only include the filters you are actually going to use.

Setup

1. Define clarkson-hooks as a dependency.

composer require level-level/clarkson-hooks

It will load automatically.

2. Point Composer towards a directory to find your Hooks namespace.

"autoload": {
    "psr-4":{
        "Hooks\\": "app/Hooks"
    }
}

3. Define a hook

Example minimal init.php (put this in app/Hooks/init.php when using path specified in composer above.

<?php
namespace Hooks;

use Clarkson\Hooks\iHook;

class init implements iHook {
    public static function register_hooks( $name ){
        add_action('init', function(){
            wp_die('Hello world');
        });
    }
}

Note: the \Clarkson\Hooks\iHook interface makes sure you correctly define your Hook object.

For a real live example, check out the init hook in Clarkson Theme.

What happens in the background

1. An apply_filters or do_action is called from WordPress.
2. Just before the actual hook is triggered, the do_action('all') is caught by Clarkson-hooks.
3. Clarkson-hooks checks for the existence of \Hooks\{hook-tag} (Composer handles loading any corresponding file).
4. The correspondig class gets the static method register_hooks called. The actual add_filter or add_action is done in this file.
5. WordPress continues as expected.

Tips

Be sure to use the --optimize-autoloader composer flag on production to have the loading process moving smoothly. Otherwise the class_exists function creates a lot of overhead.

All hooks initialize only once.