3v4l.org

run code in 300+ PHP versions simultaneously
<?php $m = memory_get_usage(); for ($i = 0; $i < 1000; $i++) { //$fn = eval('return function ($foo) {};'); $fn = function ($foo) {}; var_dump(memory_get_usage() - $m); }

preferences:
22.96 ms | 405 KiB | 5 Q