3v4l.org

run code in 300+ PHP versions simultaneously
<?php function should_return_nothing(): void { } $x = should_return_nothing(); var_dump($x);
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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
NULL
Output for 7.0.0 - 7.0.20
Fatal error: Uncaught TypeError: Return value of should_return_nothing() must be an instance of void, none returned in /in/V7iDp:5 Stack trace: #0 /in/V7iDp(7): should_return_nothing() #1 {main} thrown in /in/V7iDp on line 5
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected ':', expecting '{' in /in/V7iDp on line 3
Process exited with code 255.

preferences:
145.61 ms | 402 KiB | 184 Q