I have this scenario:
class A extends B { public function test() { parent::test(); } } class B extends someCompletelyOtherClass { public function test() { //what is the type of $this here? } } What is the type of $this in class B in function test? A or B? I tried and its A, I was thinking its B? Why is it A?
Thanks!
I'm not a PHP expert, but I think this makes sense. $this should point to the instantiated object which is of type A, even if the method is defined in class B.
If you make an instance of class B and call it's test method directly, $this should point to an object of type B.
get_parent_class which can be used to determine the class of the parent class if necessary.The problem is that you are calling test() statically, i.e., in class context. It's an error to call non-static functions statically (PHP does not enforce this, unfortunately).
You should use $this->test(), not parent::test().
In PHP, the keyword “$this” is used as a self reference of a class and you can use it for calling and using the class functions and variables. and here is an example:
class ClassOne { // this is a property of this class public $propertyOne; // When the ClassOne is instantiated, the first method called is // its constructor, which also is a method of the class public function __construct($argumentOne) { // this key word used here to assign // the argument to the class $this->propertyOne = $argumentOne; } // this is a method of the class function methodOne() { //this keyword also used here to use the value of variable $var1 return 'Method one print value for its ' . ' property $propertyOne: ' . $this->propertyOne; } } and when you call parent::test() you actually calling the test function associated with the CLASS B since you are calling it statically. try call it $this->test() and you should get A not B.
$thisis of class 'A'.