Online PHP editor | refs for R1e9Y

<?php function permutation(array $arr) { while($ele=array_shift($arr)) { $x=$ele; echo $x."\n"; foreach($arr as $rest) { $x.=" $rest"; echo $x."\n"; } } } permutation(array(array('red', 'blue', 'green'),array('small', 'med', 'large'),array('car', 'truck', 'van')));