3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(int|null $a = null, $bar): void { }
Output for 8.4.1 - 8.4.12
Deprecated: foo(): Optional parameter $a declared before required parameter $bar is implicitly treated as a required parameter in /in/e6n6Q on line 3
Output for 8.3.0 - 8.3.25
Deprecated: Optional parameter $a declared before required parameter $bar is implicitly treated as a required parameter in /in/e6n6Q on line 3
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29
preferences:
65.76 ms | 408 KiB | 5 Q