Online PHP editor | refs for ufE7h

<?php class Singleton{ private $instance; private function __construct(){} public static function instance() { if (is_null($this->instance)){ $this->instance = new static; } return $this->instance; } } $obj1 = Singleton::instance(); $obj2 = Singleton::instance(); var_dump(spl_object_hash($obj1), spl_object_hash($obj2));