Online PHP editor | refs for B1VZN

<?php function traverseArray(array $a, array $keys) { $tmp = $a; foreach ($keys as $key) { if (!isset($tmp[$key])) { return null; } $tmp = $tmp[$key]; } return $tmp; } var_dump(traverseArray(array('a' => array('b' => array('c' => array('d' => 5)))), array('a', 'b', 'c', 'd')));