3v4l.org

run code in 300+ PHP versions simultaneously
<?php $range = range(1,100000); $start_time = microtime(true); # count($range) ? $range[0] : null; array_shift($range); $end_time = microtime(true); echo ($end_time - $start_time);

preferences:
24.95 ms | 402 KiB | 5 Q