gistfile1.php

<?php

// how to reverse the singleton pattern

class Service {
	public static $data;
	public static function inc () {
		static::$data++;
	}
}

class Proxy {
	public function __construct ($service_class) {
		$this->_serviceClass = $service_class;
	}
	public function __call ($method, $args) {
		if (!method_exists($this->_serviceClass, $method))
			throw new BadMethodCallException;
		return call_user_func_array(array($this->_serviceClass, $method), $args);
	}
}

$proxy_1 = new Proxy('Service');
$proxy_2 = new Proxy('Service');

$proxy_1->inc();
$proxy_2->inc();
$proxy_1->inc();
$proxy_2->inc();

var_dump( Service::$data ); // 4