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run code in 150+ php & hhvm versions
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<?php function FUNTIK($key){ if ($key<5){ echo "0: $key\n"; $key++; FUNTIK($key); echo "KEY: $key"; } } FUNTIK(0); ?>
based on igJgo
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
0: 0 0: 1 0: 2 0: 3 0: 4 KEY: 5KEY: 4KEY: 3KEY: 2KEY: 1
Output for hhvm-3.10.0

Process exited with code 153.