3v4l.org

run code in 300+ PHP versions simultaneously
<?php $start = microtime(1); for($i = 0; $i < 1000; $i++) { $b = $i; } echo round(array_sum(explode(' ', microtime())) - array_sum(explode(' ', $start)), 3);

preferences:
47.29 ms | 402 KiB | 5 Q