Online PHP editor | refs for r8U7T

<?php class A { private $foo = ["a" => [1, 2, 3]]; function __get($a) { if (isset($this->foo[$a])) { return $this->foo[$a]; } throw new Exception("Invalid key accessed! Check with isset() first!"); } function __isset($a) { return isset($this->foo[$a]); } } $obj = new A; var_dump(isset($obj->a[1])); var_dump(isset($obj->b[1]));