3v4l.org

run code in 300+ PHP versions simultaneously
<?php function f($current_day, $delay) { return ((($current_day+$delay)%5)+1); } for($i = 1; $i < 8; $i++) { printf("f(%i, 1) => $i", $i, f($i, 1)); }

preferences:
24.22 ms | 402 KiB | 5 Q