PHP OOPs 面试题与答案

Question: What is composition in OOP?

Answer: Composition is a way of creating complex objects by combining simpler objects or classes. It involves creating relationships between objects rather than relying on inheritance.

Example:

class Engine { 
/* Engine properties and methods */ 
} 

class Car { 
private $engine; 
public function __construct(Engine $engine) { 
$this->engine = $engine; 
} 
}