3v4l.org

run code in 300+ PHP versions simultaneously
<?php function fibo($count){ if($count == 0 || $count == 1){ return 1; } else { return fibo($count - 1) + fibo($count - 2); } } fibo(1000);
Output for 5.3.9 - 5.3.27, 5.4.0 - 5.4.19, 7.0.20, 7.1.5 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7

Process exited with code 137.
preferences:
167.2 ms | 404 KiB | 182 Q