Proxy cacher method calls

proxycacher.php

<?php 

/**
 * proxycacher.php
 * Proxy cacher method calls.
 *
 * Author: swvitaliy
 */
class ProxyCacher {
	
	protected $origin = NULL;
	private $cache = array();

	function __call ($name, $args) {
		if (is_object($this->origin) && method_exists($this->origin, $name)) {
			$key = substr(sha1($name . serialize($args)), 0, 40);
			
			return isset($this->cache[$key]) ? $this->cache[$key] :
					$this->cache[$key] = call_user_func_array(array($this->origin, $name), $args);
			
		}
		// something else ...
	}

}

/*class A { 

	function f ($v) { echo "A::a called\n"; return $v . "\n"; } 

}

class B extends ProxyCacher {
	
	function __construct () {
		$this->origin = new A;
	}

}

$b = new B;
echo $b->f('first');
echo $b->f('second');
echo $b->f('first');*/