3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo strlen(rtrim(strtr(base64_encode(random_bytes(32)), '+/', '-_'), '='));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.6
43

preferences:
66.63 ms | 401 KiB | 35 Q