3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(null ?? 'default'); var_dump('' ?? 'default'); var_dump(false ?? 'default'); var_dump(0 ?? 'default');
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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(7) "default" string(0) "" bool(false) int(0)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.21
Parse error: syntax error, unexpected '?' in /in/aP8L3 on line 3
Process exited with code 255.
preferences:
192.77 ms | 402 KiB | 197 Q