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Editor to share with you how to use public in php, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

In PHP, public is an access modifier that restricts the accessibility of decorated members, meaning "public", that is, accessible at all locations, and the syntax is "class class name {public property or method definition}".

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

What is the use of public in php

Access control modifier

Form: class class name {access control modifier property or method definition;}

There are three access modifiers:

Public public: accessible (used) from all locations.

Protected protected: can only be accessed (used) within the class and in its subclasses or parents.

Private proprietary: can only be accessed (used) within this class.

Their role is to "limit" the accessibility of the members they modify.

Accessibility:

Is to use the "validity" (legitimacy) of these two forms of syntax in your code:

Object-> instance property or method

Class:: static property or method

Access control modifiers, which need to be combined with the location where the grammatical form is used to determine whether they are accessible.

There are 3 access locations (ranges):

Inside of a class:

The interior of an inherited class of a class:

Outside of a class:

The accessibility of their combination is as follows:

Summary description:

1. Members decorated by public can be accessed anywhere.

2, the interior of the class, you can access members of any level

3Magna public has the broadest accessibility, private has the narrowest accessibility, and protected is in the middle.

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