3v4l.org

run code in 300+ PHP versions simultaneously
<?php $input = "1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736"; echo $input . "\n"; echo hex2bin($input ^ a) . "\n"; ?>

preferences:
51.1 ms | 402 KiB | 5 Q