3v4l.org

run code in 500+ 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:
53.89 ms | 3695 KiB | 5 Q