Happy Birthday Crash-Override

[DFYX]

PHP-Code:

<?php
  $arr = explode(' ', '112 2 65 73 65 22 116 89 71 69 89 2 3 78');
  $md5 = md5('WordsBG');
  for($i = 0; $i < count($arr); $i++)
  {
    echo chr($arr[$i] ^ ord(substr($md5, $i, 1)));
  }
?>