Online PHP editor | refs for QA42s

<?php function reverseString($string){ $len = strlen($string); for ($i = 0; $i < $len / 2; $i++) { $string[$i] = chr(ord($string[$i]) ^ ord($string[$len - $i])); $string[$len - $i] = chr(ord($string[$i]) ^ ord($string[$len - $i])); $string[$i] = chr(ord($string[$i]) ^ ord($string[$len - $i])); } return $string; } reverseString("ping");