3v4l.org

run code in 500+ PHP versions simultaneously
<?php $foo = [1,1]; $bar = [ function() use (&$k) { echo "first!"; }, function() use (&$k) { echo "second!"; }, ]; array_multisort($foo, SORT_NUMERIC, $bar); $bar[0]();

preferences:
22.28 ms | 474 KiB | 4 Q