3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo {} class Goo extends Foo {} class FooFactory { static function create(Foo $foo) { return $foo; } } class GooFactory extends FooFactory { static function create(Goo $goo) { return $goo; } } var_dump(FooFactory::create(new Foo())); var_dump(GooFactory::create(new Goo()));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Declaration of GooFactory::create(Goo $goo) must be compatible with FooFactory::create(Foo $foo) in /in/UhtOb on line 11
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Declaration of GooFactory::create(Goo $goo) should be compatible with FooFactory::create(Foo $foo) in /in/UhtOb on line 11 object(Foo)#1 (0) { } object(Goo)#1 (0) { }
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Warning: Declaration of GooFactory::create(Goo $goo) should be compatible with FooFactory::create(Foo $foo) in /in/UhtOb on line 12 object(Foo)#1 (0) { } object(Goo)#1 (0) { }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Strict Standards: Declaration of GooFactory::create() should be compatible with FooFactory::create(Foo $foo) in /in/UhtOb on line 12 object(Foo)#1 (0) { } object(Goo)#1 (0) { }
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Strict Standards: Declaration of GooFactory::create() should be compatible with that of FooFactory::create() in /in/UhtOb on line 12 object(Foo)#1 (0) { } object(Goo)#1 (0) { }
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STATIC, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/UhtOb on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STATIC, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/UhtOb on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/UhtOb on line 7
Process exited with code 255.

preferences:
310.54 ms | 401 KiB | 458 Q