PHP OOPs 面试题与答案

Question: What is the use of the 'self' keyword in PHP?

Answer: The 'self' keyword is used to refer to the current class. It is used to access static properties and methods within the class itself.

Example:

class Example { 
private static $counter = 0; 
public static function incrementCounter() { 
self::$counter++; 
} 
}