3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function sequence($n){ for($i = 1; $i < $n; $i ++) { print("(".$i.",".($n-$i).")"); sequence($i); } } sequence(4);
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
(1,3)(2,2)(1,1)(3,1)(1,2)(2,1)(1,1)
Output for hhvm-3.10.0

Process exited with code 153.