How to implement multiple inheritance in PHP?

Multiple Inheritance is the property of the Object Oriented Programming languages in which child class or sub class can inherit the properties of the multiple parent classes or super classes. PHP doesn’t support multiple inheritance but by using Interfaces in PHP or using Traits in PHP instead of classes, we can implement it.

Does phdphp support multiple inheritance?

PHP does not support multiple inheritance as such, but it does provide some ease to reuse sets of methods in multiple independent classes, using traits. A trait is written just like a class, but it cannot be instantiated by itself. below are a couple of examples from PHP Manual:

Can a subclass extend more than one super class in phpphp?

PHP OOP does not allow multiple inheritance, it allow only multilevel inheritance. In simple word, subclass can not extend more than one super class.

What are the disadvantages of multiple inheritance in programming?

Multiple inheritance usually mixes up code, causes poor encapsulation, and makes code behave unpredictably. Usually a allowing multiple inheritance in code just causes a plethora of bad programming to come from that language usually resulting in giving the language a bad reputation.

How do child classes extend their parent vtable?

As we saw in Part 1, each child class extends its parent vtable by appending entries for each new virtual method. In this post we will cover multiple inheritance, which complicates things even when only inheriting from pure-interfaces. Let’s look at the following piece of code:

How many pointers are there in a vtable?

Intuitively I’d expect either 1 or 3 pointers (Mother, Fatherand Child). In reality it’s impossible to have a single pointer (more on this soon), and the compiler is smart enough to combine Child’s vtable entries as a continuation of Mother’s vtable, thus saving 1 pointer.

Why can’t child have one vtable pointer?

In reality it’s impossible to have a single pointer (more on this soon), and the compiler is smart enough to combine Child’s vtable entries as a continuation of Mother’s vtable, thus saving 1 pointer. Why can’t Childhave one vtable pointer for all 3 types?