Is multiple inheritance supported in PHP?

No, PHP does not support multiple inheritance natively[1][2][3][4][5]. Multiple inheritance is a feature in object-oriented programming languages that allows a class to inherit from more than one base class. However, PHP uses single inheritance, where a class can inherit from only one base class[5].

The main reason PHP does not support multiple inheritance is to avoid the "diamond problem"[4]. The diamond problem arises when two classes inherit from a common base class, and a third class inherits from those two classes. If the base class has a method that the derived classes override, it becomes ambiguous which implementation the third class should inherit[4].

To mitigate the lack of multiple inheritance, PHP provides an alternative mechanism called "traits"[2][3][4]. Traits allow you to define methods that can be reused in multiple classes, effectively sharing code across different class hierarchies[5]. By using traits, you can achieve code reuse similar to multiple inheritance while avoiding the potential complexities and ambiguities[4].

Here's an e...