Scope analytic function definition and usage summary

Source: Internet
Author: User
Tags php class php basics php sample code
In object-oriented programming, some of its own operators, such as-&GT, are used to access its own members in an object. The other one is the scope resolution operator: Two colons joined together (::). This symbol is used to access members in the class, not in the object. Use the following methods: Classname::methodname (); ClassName::p ropertyname; This structure can be used in two places: 1. When you use a class, the parent and child classes have the same properties and methods that you can use to avoid confusion. 2. Outside the class, use this operator to access the members of the class without creating an object. As we can use $this in a class to refer to an instance of the current object, the keyword self is used as a reference to the current class. Class SomeClass {function construct () {

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