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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 git.master, git.master_jit, rfc.property-hooks
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.

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