3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = 1; $bar = null; var_dump([ $foo ?? 3, $bar ?? 4 ]);
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, 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
array(2) { [0]=> int(1) [1]=> int(4) }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/03sdJ on line 7
Process exited with code 255.
preferences:
148.68 ms | 402 KiB | 183 Q