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<?php $class_aliases = [ 'FooAlias' => 'Foo' ]; spl_autoload_register(function($class) { if (isset($class_aliases[$class])) { class_alias($class_aliases[$class], $class); return true; } }); class Foo {} class Bar extends Foo {} class FooCreator { public function create(FooAlias $foo) { } } $foo = new Bar; $creator = new FooCreator(); $creator->create($foo);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught TypeError: FooCreator::create(): Argument #1 ($foo) must be of type FooAlias, Bar given, called in /in/ILaN9 on line 28 and defined in /in/ILaN9:20 Stack trace: #0 /in/ILaN9(28): FooCreator->create(Object(Bar)) #1 {main} thrown in /in/ILaN9 on line 20
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught TypeError: Argument 1 passed to FooCreator::create() must be an instance of FooAlias, instance of Bar given, called in /in/ILaN9 on line 28 and defined in /in/ILaN9:20 Stack trace: #0 /in/ILaN9(28): FooCreator->create(Object(Bar)) #1 {main} thrown in /in/ILaN9 on line 20
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Catchable fatal error: Argument 1 passed to FooCreator::create() must be an instance of FooAlias, instance of Bar given, called in /in/ILaN9 on line 28 and defined in /in/ILaN9 on line 20
Process exited with code 255.

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