How to decrypt this algorithm: BASE64(NOT(XOR(28)))?

Question

reverse engineering

Password: gpDWtrjHs5Oa2YSFiaTeoQ==

Answer 1

Something like this (puff):

$str = base64_decode('gpDWtrjHs5Oa2YSFiaTeoQ==');
for ($i = 0; $i < strlen($str); $i++) {
  echo chr(~ord($str[$i]) ^ 28);
}