Online PHP editor | refs for DrrU3

<?php function FirstReverse($str) { $length = strlen($str)-1; $rstr = NULL; for ($i = $length; $i > -1; $i--) { $rstr .= $str[$i]; } // code goes here return $rstr; } // keep this function call here // to see how to enter arguments in PHP scroll down echo FirstReverse(fgets(fopen('php://stdin', 'r')));