Online PHP editor | refs for q2WM6

<?php error_reporting(E_ERROR); class B { /** * @param string $p * @return string */ function g($p) { if (!$p) { return null; } return $p; } } class C extends B { function f($p) { return $this->$p[0]; } /** * @param int $p * @return int */ function g($p) { $this->p = $p; $this->property = [42]; return $this->f($p); } } print (new C)->g('property' . $undeclared_global) . "\n";