3v4l.org

run code in 500+ PHP versions simultaneously
<?php function foo(string $bar = null, $x) {}
Output for 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
Deprecated: foo(): Implicitly marking parameter $bar as nullable is deprecated, the explicit nullable type must be used instead in /in/4O5MK on line 3
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32
preferences:
55.79 ms | 1026 KiB | 4 Q