Online PHP editor | output for MZrtp

<?php $str = "COenrdmr"; $str[0] = chr(ord($str[0]) + hexdec('6b') - hexdec('42')); $str[1] = chr(ord($str[1]) + hexdec('61') - hexdec('65')); $str[2] = chr(ord($str[2]) + hexdec('61') - hexdec('65')); $str[3] = chr(ord($str[3]) + hexdec('79') - hexdec('47')); $str[4] = chr(ord($str[4]) - hexdec('79') + hexdec('47')); $str[5] = chr(ord($str[5]) - hexdec('62') + hexdec('65')); $str[6] = chr(ord($str[6]) - hexdec('61') + hexdec('65')); $str[7] = chr(ord($str[7]) - hexdec('42') + hexdec('6B')); var_dump($str);