3v4l.org

run code in 300+ PHP versions simultaneously
<?php $timeStart = microtime(true); foreach (range(1, 10000) as $i) { eval('function func'.$i.'() { return func'.($i-1).'(); };'); } $timeEnd = microtime(true); $executionTime = ($timeEnd - $timeStart) / 60; var_dump($execution);

preferences:
29.13 ms | 402 KiB | 5 Q