3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'UE1CQgNNHEVIDwtXBwRcHA1dTRYCCF9QGgEGDUlVDQ0PFkFFTkx9VU8iCFQWDGpXD11YSgESHVtQRWsoUAcADV0cBAJ6DlJDS0ZWBjEUTBdRCBQcVlFjXFZaEVcJNhRECglvXUwQFgIIKwFXB0QKAkYKAQtUUAAQBwgaF1gR'; var_dump([$str, base64_decode($str), base64_decode(rot13_encode($str))]);

preferences:
43.11 ms | 402 KiB | 5 Q