类库自动加载

需要用到__autoload()方法在实例化对象的时候自动进行加载类文件

init.php //初始化文件

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018/3/3 0003
 * Time: 下午 3:39
 */
header('content-type:text/html;charset=utf8');
function __autoload($className){
    //自动加载类名为className,文件名为./$className.php的文件
    require "./$className.php";
}

　　

2,测试

新建student类和teacher类

Student.php

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018/3/3 0003
 * Time: 下午 3:41
 */
class Student{
    public function __construct()
    {
        echo "学生类已加载";
    }
}

　　

Teacher.php

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018/3/3 0003
 * Time: 下午 3:41
 */
class Teacher{
    public function __construct()
    {
        echo "教师类已加载";
    }
}

　　创建index.php文件测试

<?php
/**
 * @name index.php
 * @decs
 * @author 老猫 <18368091722@163.com>
 * Updated on: 2019/5/30 13:51
 */
header("Content-Type:text/html;charset=utf-8");
//require_once("./file_upload_object.php");
require './init.php';
$student=new Student();
echo "<br>";
$teacher=new Teacher();
?>