3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo; $bar; $baz; $var = 2; echo($foo ?? $bar ?? $baz ?? $var); echo((isset($foo) && $foo !== null) ? $foo : ((isset($bar) && $bar !== null) ? $bar : ((isset($baz) && $baz !== null) ? $baz : $var)));
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
22
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '?' in /in/2j7Z7 on line 6
Process exited with code 255.
preferences:
216.34 ms | 402 KiB | 327 Q