3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = NULL; $y = NULL; $z = 3; var_dump($x ?? $y ?? $z);
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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
int(3)
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/4GEoF on line 5
Process exited with code 255.

preferences:
202.33 ms | 402 KiB | 237 Q