WordPress - Limit Actions

wp-limit-actions.php

<?php
class I_Am_Evil {
	private $times = 0;
	private $callbacks = array();
	private $accepted_args = array();
	public function __construct() {
		
	}
	public function load() {
		global $wp_filter;
		
		if ( isset( $wp_filter[ 'my_test_action' ] ) ) {
			foreach( $wp_filter[ 'my_test_action' ] as $priority => &$registered_actions ) {
				foreach( $registered_actions as $actionkey => &$callback_args ) {
					$this->callbacks[] = $callback_args[ 'function' ];
					$this->accepted_args[] = 	$callback_args[ 'accepted_args' ];
					$callback_args[ 'function' ] = array( $this, 'callback' );
				}
			}
		}
		do_action( 'my_test_action', 'test1', 'test2' ); //Assuming pass two strings
	}
	public function callback( $arg = '' ) {
		echo 'hijacked callback run' . '<br />';
		
		//From do_action
		$args = array();
		if ( is_array($arg) && 1 == count($arg) && isset($arg[0]) && is_object($arg[0]) ) // array(&$this)
			$args[] =& $arg[0];
		else
			$args[] = $arg;
		for ( $a = 2, $num = func_num_args(); $a < $num; $a++ )
			$args[] = func_get_arg($a);
			
		//LIMIT TO 5 TIMES
		if ( $this->times > 4 ) {
			echo 'third-party callback skipped' . '<br />';	
		} else {
			//Modified from do_action
			call_user_func_array( $this->callbacks[ $this->times ], array_slice($args, 0, (int) $this->accepted_args[ $this->times ] ) );
		}		
		
		
		//Increment times
		$this->times++;
		
	}	
}
class I_Am_Not_Evil {
	public function __construct() {
		add_action( 'my_test_action', array( $this, 'not_evil_callback' ), 1, 2 );
		add_action( 'my_test_action', array( $this, 'another_not_evil_callback' ), 1, 2 ); //testing multiple with same priority
		add_action( 'my_test_action', array( $this, 'not_evil_callback' ), 2, 2 );
		add_action( 'my_test_action', array( $this, 'not_evil_callback' ), 3, 2 );
		add_action( 'my_test_action', array( $this, 'not_evil_callback' ), 4, 2 );
		add_action( 'my_test_action', array( $this, 'not_evil_callback' ), 5, 2 );
		add_action( 'my_test_action', array( $this, 'not_evil_callback' ), 6, 2 );
		add_action( 'my_test_action', array( $this, 'not_evil_callback' ), 7, 2 );
	}	
	public function not_evil_callback( $arg1 = '', $arg2 = '' ) {
		echo 'original callback reached' . '<br />';
	}
	public function another_not_evil_callback( $arg1 = '', $arg2 = '' ) {
		echo 'original callback reached' . '<br />';
	}
}

//Register Not Evil Class
new I_Am_Not_Evil();

//Register Evil Class
$evil = new I_Am_Evil();
$evil->load();
?>