3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo((\Foo\Bar&\Foo\Baz)|null $param = null) { var_dump($param); } foo(null);
Output for 8.0.1 - 8.0.24, 8.1.0 - 8.1.11
Parse error: syntax error, unexpected token "(", expecting variable in /in/gjOAp on line 3
Process exited with code 255.
Output for 7.4.0 - 7.4.32
Parse error: syntax error, unexpected '(', expecting variable (T_VARIABLE) in /in/gjOAp on line 3
Process exited with code 255.
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183.69 ms | 1395 KiB | 73 Q