是否有一个关键字引用PHP中祖父类的成员？

Question

class Grandfather {

    protected function stuff() {
        // Code.
    } 
}

class Dad extends Grandfather {
    function __construct() {
        // I can refer to a member in the parent class easily.
        parent::stuff();
    }
}

class Kid extends Dad {
        // How do I refer to the stuff() method which is inside the Grandfather class from here?
}

How can I refer to a member of the Grandfather class from within the Kid class?

My first thought was Classname::method() but is there a keyword available such as self or parent?

Answer 1

1. If stuff() is nowhere overriden in the class hierarchy you can call the function with $this->stuff()
2. If stuff() were to be overriden in Dad you have to call the function with the classname, e.g. Grandfather::stuff()
3. If stuff() is overriden in Kid, you can do the call via parent::stuff()