Why PHP asks to pass arguments to the anonymous class?

I am trying to create an anonymous class which extends an abstract class.

$trainerEngineClass = new class extends AppMemoryBoostTrainerEngine {
    public function __construct($user, $trainer) {
        parent::__construct($user, $trainer);
    }

    // Abstract method implementation here
};

PHP shows an error:

Too few arguments to function class@anonymous::__construct(), 0 passed in TrainerController.php on line 74 and exactly 2 expected

I excepted that __construct will not be called, but it seems that it called. I want to create a class, not an object of this class

What should I do to create a class object?

Answer

At the very end, you are instantiating a class, so, the constructor is been fired. Anonymous classes, as it’s mentioned in the documentation, are useful for creating single and uniques objects, not for creating a template.

The syntax for passing params through is:

$trainerEngineClass = new class($user, $trainer) extends AppMemoryBoostTrainerEngine {
        public function __construct($user, $trainer) {
            parent::__construct($user, $trainer);
        }

        // Overriden abstract methods
    };