Online PHP editor | refs for Uv1uU

<?php $a1 = array("Cars", "Trucks", "Vans", "Boats",); $a2 = array('Boats', 'Trucks', 'Vans', 'Cars'); $a3 = array('Cars', 'Trucks', 'Vans', 'Boats'); $d1 = array_diff($a1, $a2); $d2 = array_diff($a2, $a3); $d3 = array_diff($a1, $a3); $e1 = $a1 === $a2; $e2 = $a2 === $a3; $e3 = $a1 === $a3; var_dump($d1, $d2, $d3, $e1, $e2, $e3);