Online PHP editor | refs for rL8tt

<?php $array1 = ['a', 'b']; $array2 = ['c', 'd']; $array3 = ['e', 'f']; $arrays = [$array1, $array2, $array3]; function array_cartesian($arrays) { if(count($arrays) == 0) { return array(array()); } $a = array_shift($arrays); $c = array_cartesian($arrays); $r = []; foreach($a as $v) { foreach($c as $p) { $r[] = array_merge(array($v), $p); } } return $r; } print_r(array_cartesian($arrays));