3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function FUNTIK($key){ if ($key<5){ echo "0: $key\n"; $key++; FUNTIK($key); echo "KEY: $key\n"; } } FUNTIK(0); ?>
based on HFDLU
Output for 4.3.0 - 7.2.0
0: 0 0: 1 0: 2 0: 3 0: 4 KEY: 5 KEY: 4 KEY: 3 KEY: 2 KEY: 1