关于PHP的加载类操作以及其他两种魔术办法应用

<?php

加载类

//include("./Ren.class.php");

//include "./Ren.class.php";

include_once("./Ren.class.php");

include_once("./Ren.class.php");

$f = new Ren();

$f->test();

require("./Ren.class.php");

require_once("./Ren.class.php");

require_once "./Ren.class.php";

$f = new Ren();

$f->test();

主动加载类

//1.所有类文件名和类名要坚持一致

//2.所有类文件放在统一文件下

//3.所有类文件定名规则一致

function __autoload($cname){

require_once("./$cname.class.php");

}

$t = new test();

$t->ceshi().'<br>';

$s = new Ren();

$s->test();

两种魔术办法

class Ren{

public $name;

public function say(){

echo "输出对象办法";

}

//输出对象的办法

public function __tostring(){

echo "另一种输出办法"; //echo $s->__tostring();

return "另一种输出办法";//echo $s;

}

//克隆对象的办法

public function __clone(){

$this->name = "Riven";//$this代表复本(克隆的工具)

}

}

$s = new Ren();

//echo $s->__tostring();//输入字符串

//$s->say();

$s->name = "小V";

var_dump($s);

$s1 = clone $s;

var_dump($s1);

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