Online PHP editor | output for Kdmqp

<?php $haystack = 'abdabc'; $needle = 'c'; $replace = 'z'; $limit = 2; function str_replace_limit($haystack, $needle, $replace, $limit, $start_pos = 0) { if ($limit < 1 || ($pos = strpos($haystack,$needle,$start_pos)) === false) { return $haystack; } else { return str_replace_limit( substr_replace($haystack, $replace, $pos, strlen($needle)), $needle, $replace, $limit - 1, $pos + strlen($replace) ); } } echo str_replace_limit($haystack, $needle, $replace, $limit);