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<?php Interface ShapeInterface { public function getArea(); } Class ShapeManager { public function __construct(ShapeInterface $shape) { $this->shape = $shape; } public function getArea() { $this->shape->getArea(); } } Class Circle { public function getArea() { return 'circle area'; } } Class Sqaure { public function getArea() { return 'square area'; } } $shape = new ShapeManager(new Circle); $shape->getArea();
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: ShapeManager::__construct(): Argument #1 ($shape) must be of type ShapeInterface, Circle given, called in /in/QYZPm on line 29 and defined in /in/QYZPm:9 Stack trace: #0 /in/QYZPm(29): ShapeManager->__construct(Object(Circle)) #1 {main} thrown in /in/QYZPm on line 9
Process exited with code 255.

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