How can var type hinting be utilized for classes in PHP, especially in cases where classes are dynamically created at runtime?

When classes are dynamically created at runtime in PHP, it can be challenging to use var type hinting for these classes since the type is not known beforehand. One way to handle this is by using interfaces to define a common set of methods that the dynamically created classes must implement. By type hinting the interface instead of the actual class, you can ensure that the necessary methods are present without knowing the specific class in advance.

interface MyInterface {
    public function myMethod();
}

class MyClass implements MyInterface {
    public function myMethod() {
        // implementation
    }
}

// Dynamically create a class that implements MyInterface
$dynamicClass = new class implements MyInterface {
    public function myMethod() {
        // implementation
    }
};

function myFunction(MyInterface $obj) {
    $obj->myMethod();
}

myFunction(new MyClass());
myFunction($dynamicClass);