3v4l.org

run code in 500+ PHP versions simultaneously
<?php function one() { return 'two'; } function two() { return 'three'; } function three() { return 'four'; } function four() { echo 'Done!'; } $a = one()()()();
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Done!
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28
Parse error: syntax error, unexpected '(' in /in/2UCpv on line 19
Process exited with code 255.
preferences:
77.55 ms | 1668 KiB | 4 Q