Shulou(Shulou.com)06/01 Report--

This article focuses on "what are the differences between php construction methods and member methods". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn what are the differences between the php construction method and the member method.

Differences: 1, a class can only have one constructor, but can have multiple member methods; 2, if there is no write constructor, the system will automatically add a no-parameter constructor, but will not automatically add member methods.

This article operating environment: Windows10 system, PHP7.1 version, Dell G3 computer.

What is the difference between php constructors and member methods

The class in php-class XX {}, through the definition of the class, you can use to call the member properties and member methods in the class.

Object-A class is an object, an object can have multiple properties, and a class can have multiple member methods.

Constructor: a class can only have one constructor, and the system will default to a constructor called function _ _ constructor () {}. If there are two identical constructors, the previous constructor will be overwritten; if the system has a default constructor and the user has defined a constructor, then the default constructor will be ignored by using the user's constructor. Php4 uses the function class name () {} to create the constructor, and php5 uses _ _ construct () {} to create the constructor. The function of the constructor is to initialize the object.

Destructor: a class can only have one destructor. If no destructor is specified in the class, the destructor will not be called (delete garbage); the object that goes in first will be deleted, and the object that goes in later will be deleted first. Function _ _ destruct () {} cannot pass parameters.

The call to the class does not require the address character & and will automatically invoke the contents of the class.

At this point, I believe you have a deeper understanding of "what are the differences between php construction methods and member methods". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.