Online PHP editor | refs for fPJnb

<?php function call($o, $a, $r, $context) { return call_user_func_array($o, $a); } class A { protected $a = 5; protected function dd() { return 'protected'; } public function __invoke() { $f = function () { return $this->a; }; //return call($f, array(), array(), isset($this) ? $this : null); return call(array($this, 'dd'), array(), array(), isset($this) ? $this : null); } } $a = new A; var_dump($a());