multiple class inheritance

Question

In PHP, is it possible to have multiple inheritance (by the nature of the PHP, not writting modification code)?

For example :

class a
{
    public function foo();
}

class b
{
    public function bar();
}

class c extends a, b
{
    public function baz();
}

possible duplicate of http://stackoverflow.com/questions/90982/multiple-inheritance-in-php — Mark Byers, Apr 08 '10 at 19:08
Here's [a good answer](http://stackoverflow.com/questions/90982/multiple-inheritance-in-php) — Hooray Im Helping, Apr 08 '10 at 19:07
And can an interface define a method? I need to have debug methods in all my classes. I also have a DBUser class I want to inherit to provide DB helper functions for classes. — Tomáš Zato - Reinstate Monica, Apr 12 '14 at 10:59

selfawaresoup · Answer 1 · 2015-03-31T15:39:08.247

1

No. There's no real multiple inheritance in PHP and thats a good thing. See the other answers for alternatives.

Edit: By now, PHP supports Traits, of which one class can include more than one. They avoid the usual problems of multiple inheritance by throwing an error or requiring you to alias conflicting names.

edited Mar 31 '15 at 15:39

answered May 12 '10 at 04:19

selfawaresoup

14,913
7
34
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Because of this: http://en.wikipedia.org/wiki/Multiple_inheritance#The_diamond_problem – selfawaresoup Mar 31 '15 at 15:33
1

@Inwdr I don't know if that's an issue as other languages have managed it somehow ... anyway, doesnt matter – StefanNch Apr 01 '15 at 05:36
Many other languages have managed it the same way as PHP, they simply don't allow multiple inheritance. – selfawaresoup Apr 01 '15 at 08:44

score 0 · Answer 2 · answered Dec 02 '18 at 07:04

0

class A extends B{

}

class B extends C{

}

class C{

}

answered Dec 02 '18 at 07:04

Mahbub Alam

338
2
5

multiple class inheritance

2 Answers2