Online PHP editor | refs for cmE8t

<?php //The values in this arrays contains the names of the indexes (keys) that should exist in the data array $required = array('key1', 'key2', 'key3' ); $data = array( 'key1' => 10, 'key2' => 20, 'key3' => 30, 'key4' => 40 ); if(count(array_intersect_key(array_flip($required), $data)) === count($required)) { //All required keys exist! }