3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = 'foo'; define('C', static fn (array $bar): array => [$foo, $bar]); var_dump((C)(['bar'])); #[SomeAttr(C)] function baz() {}
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(2) { [0]=> string(3) "foo" [1]=> array(1) { [0]=> string(3) "bar" } }
preferences:
55.2 ms | 988 KiB | 4 Q