3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 0; echo true ?? false.PHP_EOL; echo $a ?? 'A'.PHP_EOL; echo $b ?? 'B'.PHP_EOL;
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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
10B
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/f4GlD on line 5
Process exited with code 255.

preferences:
143.43 ms | 401 KiB | 179 Q