3v4l.org

run code in 300+ PHP versions simultaneously
<?php function f($n) { echo date("jS", mktime(1,1,1,1,($n%10==0?10:$n%10))); echo "\n"; } f(12); f(15); f(40); f(91);

preferences:
38.83 ms | 402 KiB | 5 Q