Custom hooks with arguments

MY_Hooks.php

<?php defined('BASEPATH') OR exit('No direct script access allowed');
/**
 * MY_Hooks Class
 *
 * Extends Hooks by allowing you to pass parameters on the fly
 * with custom hook calls. Much of the logic is borrowed from the 
 * core CI_Hooks class.
 *
 * Ex:
 *
 * If you have a custom hook set up like this:
 *
 *   $hook['custom_hook'] = array('class'    => 'MyClass',
 * 				  'function' => 'Myfunction',
 * 				  'filename' => 'Myclass.php',
 * 				  'filepath' => 'hooks');
 *
 * And the function is defined like this:
 *
 *   function Myfunction($foo='', $bar='', $baz='') { ... }
 *
 * You can call the hook like this:
 *
 *   $this->hooks->_call_hook('custom_hook', array('foo', 'bar', 'baz'));
 *
 */
class MY_Hooks extends CI_Hooks {

	/**
	 * Call Hook
	 *
	 * Calls a particular hook
	 *
	 * @access	private
	 * @param	string	the hook name
	 * @return	mixed
	 */
	function _call_hook($which = '', $params = array())
	{
		if ( ! $this->enabled OR ! isset($this->hooks[$which]))
		{
			return FALSE;
		}

		if (isset($this->hooks[$which][0]) AND is_array($this->hooks[$which][0]))
		{
			$_hook = array();

			foreach ($this->hooks[$which] as $val)
			{
				$_hook[] = $this->_run_hook($val, $params);
			}

			return $_hook;
		}

		return $this->_run_hook($this->hooks[$which], $params);
	}

	// --------------------------------------------------------------------

	/**
	 * Run Hook
	 *
	 * Runs a particular hook
	 *
	 * @access	private
	 * @param	array	the hook details
	 * @return	bool
	 */
	function _run_hook($data, $params = '')
	{
		if ( ! is_array($data))
		{
			return FALSE;
		}

		// -----------------------------------
		// Safety - Prevents run-away loops
		// -----------------------------------

		// If the script being called happens to have the same
		// hook call within it a loop can happen

		if ($this->in_progress == TRUE)
		{
			return;
		}

		// -----------------------------------
		// Set file path
		// -----------------------------------

		if ( ! isset($data['filepath']) OR ! isset($data['filename']))
		{
			return FALSE;
		}

		$filepath = APPPATH.$data['filepath'].'/'.$data['filename'];

		if ( ! file_exists($filepath))
		{
			return FALSE;
		}

		// -----------------------------------
		// Set class/function name
		// -----------------------------------

		$class		= FALSE;
		$function	= FALSE;

		if (isset($data['class']) AND $data['class'] != '')
		{
			$class = $data['class'];
		}

		if (isset($data['function']))
		{
			$function = $data['function'];
		}

		if (empty($params) && isset($data['params']))
		{
			$params = $data['params'];
		}

		if ($class === FALSE AND $function === FALSE)
		{
			return FALSE;
		}

		// -----------------------------------
		// Set the in_progress flag
		// -----------------------------------

		$this->in_progress = TRUE;

		// -----------------------------------
		// Call the requested class and/or function
		// -----------------------------------

		$hook_output = FALSE;
		if ($class !== FALSE)
		{
			if ( ! class_exists($class))
			{
				require($filepath);
			}

			$HOOK = new $class;

			$hook_output = call_user_func_array(array($HOOK, $function), $params);
		}
		else
		{
			if ( ! function_exists($function))
			{
				require($filepath);
			}

			$hook_output = call_user_func_array($function, $params);
		}

		$this->in_progress = FALSE;

		return $hook_output;
	}

}

// END MY_Hooks class

/* End of file MY_Hooks.php */
/* Location: ./application/core/MY_Hooks.php */