PHP implements magic methods and about independent instances and connected instances

<?php
//魔术方法
//当包含多个类
//1.自动装载类的魔术方法__autoload()
function __autoload($classname){
if (isset($classname)){
require_once $classname.&#39;.class.php&#39;;
}
}
/* $computer1=new Computer();
$computer1->addList(&#39;dalisng&#39;,234);
echo $computer1; */
//__call()屏蔽调用方法时候产生的错误，当我们调用一个不存在的方法时候，会自动调用__call（）方法。
//独立实例，两个实例各自建立，互不干涉
$computer2=new Computer();
echo $computer2->name;echo "<br/>";
$computer3=new Computer();
echo $computer3->name;echo "<br/>";
$computer3->name="大亮";
echo &#39;$computer3->name:&#39;.$computer3->name;echo "<br/>";
echo &#39;$computer2->name:&#39;.$computer2->name;echo "<br/>";
echo "<hr/>";
//相连实例，即 用等于号来开辟一个新的实例，此时两个实例共同指向一个内存地址，一损俱损，一荣俱荣
$computer4=new Computer();
echo &#39;$computer4->name:&#39;.$computer4->name;echo "<br/>";
$computer5=$computer4;
echo &#39;$computer5->name:&#39;.$computer5->name;echo "<br/>";
$computer4->name="大亮";
echo &#39;$computer4->name:&#39;.$computer4->name;echo "<br/>";
echo &#39;$computer5->name:&#39;.$computer5->name;echo "<br/>";
echo "<hr/>";
//克隆__clone,克隆的新实例和被克隆的实例是两个相互独立的个体，虽然属性值相同，但是属性存放的地址不同，所以克隆后你我生死无关
$computer6=new Computer();
echo &#39;$computer6->name:&#39;.$computer6->name;echo "<br/>";
$computer7=clone $computer6;
echo &#39;$computer7->name:&#39;.$computer7->name;echo "<br/>";
$computer6->name="克隆";
echo &#39;$computer6->name:&#39;.$computer6->name;echo "<br/>";
echo &#39;$computer7->name:&#39;.$computer7->name;echo "<br/>";

<?php
class Computer{
public $name="1234";
function __construct(){
echo "you are right!";
}

function __call($methodName,$argsList){//当方法不存在的时候会自动调用此方法，$argsList是相应的参数
echo $methodName."()方法不存在!";
echo "<pre class="brush:php;toolbar:false">";
print_r($argsList);
echo "