char code shifting encode decode

encodedecode.js

var z='',x='',s = 'now.something.com';
for( var i = 0; i < s.length; i++ ){
	x += String.fromCharCode(s.charCodeAt(i)^6);
}
console.log(x)
for( var i = 0; i < x.length; i++ ){
	z += String.fromCharCode(6^x.charCodeAt(i));
}
console.log(z)

in.php

$s = strrev(implode('',array_map(function($c){return chr(6^ord($c));},str_split($s))));
echo strrev(implode('',array_map(function($c){return chr(ord($c)^6);},str_split($s))));