PHP __autoload Automatic loading mechanism

Function: __autoload () future will be discarded (spl_autoload_register () substitution)
Function: When the class name error, the __autoload () use reason: When writing code will refer to a lot of require or include, this will cause code confusion and repeated references, and the automatic loading mechanism can solve the problem
I combine name SpaceAnd Auto LoadTo explain a simple example preface: Here I use the namespace corresponding to the specified directory menu, such as my rectangle namespace is controller, so that the directory structure will not error when loading automatically. 1 Create the directory structure as follows:

2) Code 01.php

<?php
/**
* Created by Phpstorm.
* User:lisam *
DATE:2016/11/14
* time:22:34
/use Controller\rectangle as Rectangle;  ① introduces the namespace

function __autoload ($class _name)  //② automatically loads the corresponding class name
{
$fileName = $class _name If the error occurs. ". class.php";
if (file_exists ($fileName)) {
    require_once ();
    Echo ' __autload class: ', $class _name, ' <br/> ';
}

$memo = new Rectangle ();
$memo->dumpobject ();

Rectanle.class.php

<?php
/**
* Created by Phpstorm.
* User:lisam *
DATE:2016/11/13
* time:22:53 * *
namespace Controller;

Class Rectangle
{
    private $width = 0;
    Private $height = 0;


    The Public Function Dumpobject ()
    {
        //Gets the class name, variable, method
        $class = Get_class ($this);//Find the current class name
        $attributes = Get _object_vars ($this);
        $methods = Get_class_methods ($this);

        Print information
        echo "
 

 

 

 
Modify:Replace __autoload () with the following:
Spl_autoload_register ("AutoLoad");  Spl_autoload_register inside uses a custom

function autoload ($class _name)
{
$fileName = $class _name. ". class.php";
if (file_exists ($fileName)) {
    require_once ($fileName);
    Echo ' __autload class: ', $class _name, ' <br/> ';
}
 

 

 

Other uses:
spl_autoload_functions() Get loaded automatically: Get results as follows: