Php and multiple-inheritance

Question

i have the following simplified code

class A{}
class B extends A{}
class C extends B{}

It is working perfectly and everything is ok, but i wanted to make sure that it's not bad practice so i googled "multiple inheritance in php" and was surprised that many posts i read said that multiple inheritance in php is not supported and the alternative is traits.

So i doubted my definition of multiple inheritance and googled a good example about it and this Multiple Inheritance: What's a good example? came up, and it is in fact exactly as what i was doing but in a different context.

can someone shed some light on the matter?

Because it's not multiple inheritance. It's just two-levels inheritance, but each class has only one parent — Alma Do
– Alma Do, Commented Aug 11, 2014 at 12:27
You just created a grandchild class, not multiple inheritance. — Christopher Lamm
– Christopher Lamm, Commented Aug 11, 2014 at 12:28
@ChristopherLamm can you please take a look at the answer of the question i linked? — tareq
– tareq, Commented Aug 11, 2014 at 12:35

Naktibalda · Accepted Answer · 2014-08-11 12:42:34Z

2

You are not using multiple inheritance, you pasted an example of polymorphism.

Multiple inheritace = multiple parents

class Animal {}   
class Mammal extends Animal {} //single inheritance
class WingedAnimal extends Animal {} //single inheritance
class Bat extends Mammal extends WingedAnimal {} //multiple inheritance, not supported by PHP.

edited Aug 11, 2014 at 12:42

answered Aug 11, 2014 at 12:27

Naktibalda

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3 Comments

tareq Over a year ago

then what's with the answer of the question i linked. @Naktibalda

tareq Over a year ago

so the answer in the link is not correct right? @Naktibalda

Naktibalda Over a year ago

Answer in the link is correct. But there is no multiple inheritance in your code.

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