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Today, the editor will share with you the relevant knowledge points about how to use php construction method _ _ construct (). The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look.

Concept

1. The construction method _ _ construct () is a special method with unique structure.

2. The method is specified by the system, the developer only needs to write once when defining it, and the object is called automatically after the class with constructor instantiates the object.

Syntax:

Function _ construct (arg1,arg2,...) {.}

Attention to use

If both the parent class and the subclass have _ _ construct, only the _ _ construct of the subclass will be called, and the _ _ construct of the parent class will not be called automatically

The _ _ construct method of a subclass if you want to call the _ _ construct method of the parent class, you must call the constructor of the parent class in the constructor of the subclass

Example

Class People {public $name; private $sex; protected $height; public function _ _ construct ($name) {echo $name. "say:". "Knowledge is power!";}} $man = new People ("Zhang San"). That's all about the article "how to use php Construction method _ _ construct ()". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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