PHP and MySQL authoritative guide-chapters 7th, 8

function keyword functions

A recursive function that contains statements that call itself directly or indirectly

Include,require loading a function library file into a script program

Use special pointers in the $this class

Access or operation in class, $this

const Keyword Class constants

Construction Method _construct ()

destructor Method _destruct ()

Static class

The "::" symbol is called a range resolution operation that can be used to access static members, static methods, and constants, and can also be used to override members and methods in a class.

Use self: To represent static methods that are called in the same class

Clone () Cloning object

_clone () To adjust the cloning behavior of an object

Inheriting class extends

Parent:: Keyword used to represent the parent class and the member method in the parent class to invoke

Abstract class Abstraction

Interface interface

Namespace namespace

Magic method: __tostring () __autoload () __get () __set () __call

PHP and MySQL authoritative guide-chapters 7th, 8