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<?php class Singleton { private function __construct(){} private function __clone(){} private function __sleep(){} private function __wakeup(){} private static $instance; public static function getInstance() { if ( ! self::$instance) { self::$instance = new static(); } return self::$instance; } } $obj1 = Singleton::getInstance(); $obj2 = Singleton::getInstance(); var_dump(spl_object_hash($obj1) == spl_object_hash($obj2)); $cloner = function(){ return new function{}( return clone $this; ); }; $obj3 = null; $obj3 = $cloner->bindTo($obj1)->__invoke(); var_dump(spl_object_hash($obj1) == spl_object_hash($obj3));