Inheritance of PHP constructors

This article introduces the inheritance of PHP constructors, which has certain reference value. Now I share it with you. Friends in need can refer to it

// ===Notes Part 1= ==

/*
// Inheritance of constructor methods

Constructor methods can be inherited
The principles of inheritance are the same as ordinary methods.

And then , if the subclass also declares a constructor, the constructor of the parent class will be overwritten.
If the constructor of the parent class is overwritten, naturally, only the new constructor in the subclass will be executed.
*/

// ===Code part 1===

class Human {
    public function __construct() {
        echo &#39;呱呱坠地！<br >&#39;;
    }
}class Stu extends Human {}$ming = new Stu(); // 呱呱坠地！// 这说明构造函数也是可以继承的

// ===Code part 2===

class Emperor extends Human {
    public function __construct() {
        echo &#39;红光满屋，终日不散<br >&#39;;
    }
}$zhu = new Emperor();echo &#39;<hr >&#39;;

// ===Notes Part 3===

/*
If there is a constructor when inheriting from a subclass,
should be added to the constructor Previous sentence:
parent::__construct();

Then write your own business logic.
*/

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