3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(ticks=1); if (function_exists('register_tick_function')): register_tick_function('hello'); endif; function hello() { echo 'hello'; }
Output for 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
hello
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33
hellohello
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
hellohellohello
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Warning: main(): Unable to call hello() - function does not exist in /in/2Vr4C on line 5 Warning: main(): Unable to call hello() - function does not exist in /in/2Vr4C on line 6 hello
Output for 4.3.0 - 4.3.1
Warning: main() [http://www.php.net/function.main]: Unable to call hello() - function does not exist in /in/2Vr4C on line 5 Warning: main() [http://www.php.net/function.main]: Unable to call hello() - function does not exist in /in/2Vr4C on line 6 hello

preferences:
197.04 ms | 402 KiB | 312 Q