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<?php class CI_Controller { /** * Reference to the CI singleton * * @var object */ private static $instance; /** * Class constructor * * @return void */ public function __construct() { self::$instance =& $this; } // -------------------------------------------------------------------- /** * Get the CI singleton * * @static * @return object */ public static function &get_instance() { return self::$instance; } } $obj1 = new CI_Controller(); $obj2 = new CI_Controller(); var_dump(CI_Controller::get_instance());