Overriding methods in PHP?

php override function call parent
php call parent method
method overloading in php w3schools
php override function with different parameters
polymorphism in php
inheritance in php
overloading and overriding in php in hindi
inheritance in php tutorial point

In other OO languages like Java we can override a function, possible using keywords/annotations like implements, @override etc.

Is there a way to do so in PHP? I mean, for example:

class myClass {
    public static function reImplmentThis() { //this method should be overriden by user
    }
}

I want user to implement their own myClass::reImplementThis() method.

How can I do that in PHP? If it is possible, can I make it optional?

I mean, if the user is not implementing the method, can I specify a default method or can I identify that the method is not defined (can I do this using method_exists)?

<?php
abstract class Test
{
    abstract protected function test();

    protected function anotherTest() {

    }
}

class TestTest extends Test
{
    protected function test() {

    }
}

$test = new TestTest();
?>

This way the class TestTest must override the function test.

PHP's Method Overriding. In the context of object oriented…, Overriding a method which is called from base class works like this: <?php class Foo { public function printItem($string) { echo 'Foo: ' . $string; } public function� As we all know overriding in PHP is a method of updating the inherited method from parent class to child class. So, in this case you will require method with same name in parent class as well as in

override_function - Manual, Method overloading occurs when two or more methods with same method name but different number of parameters in single class. PHP does not support method overloading. Method overriding means two methods with same method name and same number of parameters in two different classes means parent class and child class. What is Overriding in PHP? Overriding with Access Modifiers. There are three access modifiers. As we know the protected method is accessible from a Overriding with Final Keyword. The final keyword is used for classes and methods. Methods and Classes, not variables can Final Class Overriding. A

Yes, there is. You have the option to override a method by extending the class and defining a method with the same name, function signature and access specifier (either public or protected) it had in the base class. The method should not be declared abstract in the base class or you will be required to implement it in the derived class. In you example it would look something like this:

class MyClass {
    public static function reImplmentThis() { //this method should be overriden by user
    }
}

class MyDerivedClass extends MyClass {
    public static function reImplmentThis() { //the method you want to call
    }
}

If the user does not overrides it, MyDerivedClass will still have a reImplmentThis() method, the one inherited from MyClass.

That said, you need to be very careful when invoking extended static methods from your derived class to stay out of trouble. I encourage you to refactor your code to extend instance methods unless you have a very specific need to extend static classes. And if you decide there is no better way than extending static classes please be sure to understand Late Static Binding pretty well.

Yes, its possible to check if the method is implemented or not and get a whole lot more of information about a class using PHP Reflection.

Object Inheritance - Manual, Function Overloading in PHPFunction overloading is a feature that permits making creating several methods with a similar name that works� PHP overriding methods Function overriding is used when a class has some methods and derived class wants same methods with different behavior. So, using overriding you can completely change the behavior of parent class. Function overriding can be implemented by extending a class and rewriting a function which existed in the parent class.

What is function overloading and overriding in php?, Overriding of functions and classes are done when a method in the derived class is created which is the same as that of the method in the base class or parent� Overloading and Overriding in PHP with Examples 1. Method Overloading As discussed above PHP does not support method overloading compared to other language like Java or 2. Method Overriding

Function Overloading and Overriding in PHP, PHP overriding methods. Function overriding is used when a class has some methods and derived class wants same methods with different behavior. So, using� What is method overriding in PHP? In object oriented programming overriding is to replace parent method in child class.In overriding you can re-declare parent class method in child class. So, basically the purpose of overriding is to change the behavior of your parent class method.

Overriding in PHP, PHP traits provide a convenient means of sharing methods between classes. There are times though that we may need to override or extend a� Yes, there is. You have the option to override a method by extending the class and defining a method with the same name, function signature and access specifier (either public or protected) it had in the base class. The method should not be declared abstract in the base class or you will be required to implement it in the derived class.

Comments
  • That's exactly what inheritance is for. php.net/manual/en/language.oop5.inheritance.php
  • In general, I'd make that non-static, and then the user can just extend myClass - choosing whether or not to redefine reImplmentThis(). You don't need to test for the existence of a user's implemention if your default implementation is acceptable.
  • You could use and abstract class to extend (as halfer says) and an interface class ( killerphp.com/articles/php-interfaces ) to make sure that the final class has, at least, the functions that you specify. I'm only just learning about these (interfaces) I may be wrong, but from what I've read that seem to be the reason to have them.
  • In the OP's case, reImplementThis() would be declared non-abstract, since the default implementation is okay. But yes, +1.
  • @Dillen this is not the answer to the question that the user asked, this is just a variant on how it should be done but does not satisfy what the user is asking