3v4l.org

run code in 500+ PHP versions simultaneously
<?php function foo((\Foo\Bar&\Foo\Baz)|\Foo\Qux $param = null) { var_dump($param); } foo(null);
Output for 8.2.22 - 8.2.34, 8.3.0 - 8.3.35
NULL
Output for 8.1.30 - 8.1.34
Parse error: syntax error, unexpected token "(", expecting variable in /in/UADDP on line 3
Process exited with code 255.
Output for 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
Deprecated: foo(): Implicitly marking parameter $param as nullable is deprecated, the explicit nullable type must be used instead in /in/UADDP on line 3 NULL
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28.63 ms | 1143 KiB | 11 Q