3v4l.org

run code in 500+ PHP versions simultaneously
<?php for ($i = 0, $t = -microtime(TRUE); $i < 10000; $i++) { $foo = NULL; $foo = create_function('stdClass $a, $b = 1', ''); } echo $t + microtime(TRUE);

preferences:
49.51 ms | 2511 KiB | 5 Q