What is the method of calling the parent class constructor in php?

php calls the parent class constructor: first, the parent class constructs the function first, the code is [public function __construct()]; then use [parent::__construct()] to call the parent class constructor.

php calls the parent class constructor method:

1. Use the function [parent::__construct()] to call The parent class constructor

code is as follows;

"; parent::__construct(); //调用父类构造函数 } } $childClass = new ChildClass(); //对类的实例化 ?>

2. Running results

Constructor of the subclass

Constructor of the parent class

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