3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php interface FooInterface { public function dump(self $baz); } class Foo implements FooInterface { public function dump(self $baz) { var_dump($baz); } } class Bar extends Foo { public function dump(Foo $baz) { parent::dump($baz); } } (new Foo)->dump(new Bar); //(new Bar)->dump(new Bar); //(new Bar)->dump(new Foo);
based on Ndu7E
Output for 7.0.0 - 7.1.0
Fatal error: Declaration of Foo::dump(Foo $baz) must be compatible with FooInterface::dump(FooInterface $baz) in /in/BVFFX on line 9
Process exited with code 255.
Output for hhvm-3.12.0
Fatal error: Declaration of Foo::dump() must be compatible with that of FooInterface::dump() in /in/BVFFX on line 9
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.1 - 5.6.28
Fatal error: Declaration of Foo::dump() must be compatible with FooInterface::dump(FooInterface $baz) in /in/BVFFX on line 10
Process exited with code 255.
Output for 5.4.0
Fatal error: Declaration of Bar::dump() must be compatible with FooInterface::dump(self $baz) in /in/BVFFX on line 17
Process exited with code 255.
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/BVFFX on line 24
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/BVFFX on line 24
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/BVFFX on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/BVFFX on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/BVFFX on line 4
Process exited with code 255.