<?php /** * The handler for a plugin hook receives information about the hook (name and * type), the current value for the hook, and parameters related to the hook. */ elgg_register_plugin_hook_handler('forward', '404', 'example_plugin_hook_handler'); function example_plugin_hook_handler($hook, $type, $value, $params) { var_dump($hook); var_dump($type); var_dump($value); var_dump($params); // we are not changing $value so return null return null; }