Online PHP editor | output for kY4mC

<?php $iter = 100; $array = range(0, $iter); $function = function($val, $key) {}; $t = microtime(true); for($i = 0; $i $iter; $i++) { foreach($array as $key = $val) { $function($val, $key); } } echo 'foreach '.(microtime(true) - $t); $t = microtime(true); for($i = 0; $i $iter; $i++) { array_walk($array, $function); } echo ', array_walk '.(microtime(true) - $t); $t = microtime(true); for($i = 0; $i $iter; $i++) { array_map($function, $array, array_keys($array)); } echo ', array_map '.(microtime(true) - $t);