3v4l.org

run code in 300+ PHP versions simultaneously
<?php $value = base64_encode(md5('')); $start = microtime(true); for ($i = 0; $i < 10000000; ++$i) { } $end = microtime(true); echo $i/($end - $start), ' op/s';

preferences:
38.54 ms | 402 KiB | 5 Q