MordenPHP阅读笔记（一）先跑再说，跑累了再走

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MordenPHP阅读笔记（一）先跑再说，跑累了再走 - 韧还

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May 20, 2016 am 11:40 AM

---恢复内容开始---

　　后台一大堆半成品，或者是几乎不成的。。。

这本书不错，起码是别人推荐的，然后也是比较新的东西，学哪本不是学嘛，关键是得看。

今儿个网不好，科研所需的代码下不到，看书做笔记吧。

这本书基本将的是5.4版本后的一些新变化，写的浅显易懂，虽然鄙人走的还不顺溜，跑一跑也摔不到哪儿去，跑累了我有的是走的机会~~

（一）特性

一、命名空间

一个文件一个类，用了命名空间方便互相调用；

<span style="color: #008080;"> 1</span> <span style="color: #008000;">//</span>
<span style="color: #008080;"> 2</span> <span style="color: #008000;">//Namespace
</span><span style="color: #008080;"> 3</span> <span style="color: #008000;">//</span>
<span style="color: #008080;"> 4</span> <span style="color: #000000;">namespace ModernPHP\feature\mingmingkongjian;
</span><span style="color: #008080;"> 5</span> <span style="color: #0000ff;">function</span> <span style="color: #008080;">var_dump</span><span style="color: #000000;">(){
</span><span style="color: #008080;"> 6</span>     <span style="color: #0000ff;">echo</span> "Shit!".""<span style="color: #000000;">;
</span><span style="color: #008080;"> 7</span> <span style="color: #000000;">}
</span><span style="color: #008080;"> 8</span> 
<span style="color: #008080;"> 9</span> <span style="color: #800080;">$test</span>="OK"<span style="color: #000000;">;
</span><span style="color: #008080;">10</span> <span style="color: #008080;">var_dump</span>(<span style="color: #800080;">$test</span><span style="color: #000000;">);
</span><span style="color: #008080;">11</span> \ModernPHP\feature\mingmingkongjian\<span style="color: #008080;">var_dump</span><span style="color: #000000;">();
</span><span style="color: #008080;">12</span> 
<span style="color: #008080;">13</span> <span style="color: #008000;">//</span><span style="color: #008000;">命名空间必须顶头，但一个文件中可以有很多命名空间，然后也可以有子空间
</span><span style="color: #008080;">14</span> <span style="color: #008000;">//厂商的命名空间是最顶层的命名空间，用于识别品牌
</span><span style="color: #008080;">15</span> <span style="color: #008000;">//旨在解决命名冲突的问题，当然现在应该有比较灵活的其他用法
</span><span style="color: #008080;">16</span> 
<span style="color: #008080;">17</span> <span style="color: #008000;">//一个比较实用的点：导入和别名
</span><span style="color: #008080;">18</span> <span style="color: #008000;">//导入另一个文件夹下的类定义，直接用</span>
<span style="color: #008080;">19</span> <span style="color: #0000ff;">require</span> 'index.php'<span style="color: #000000;">;
</span><span style="color: #008080;">20</span> <span style="color: #0000ff;">use</span><span style="color: #000000;"> a\aaa;
</span><span style="color: #008080;">21</span> <span style="color: #800080;">$daoru</span>=<span style="color: #0000ff;">new</span><span style="color: #000000;"> aaa;
</span><span style="color: #008080;">22</span> <span style="color: #800080;">$daoru</span>-><span style="color: #000000;">send();
</span><span style="color: #008080;">23</span> <span style="color: #008000;">//</span><span style="color: #008000;">use是导入，然后在use中设置最懒的别名
</span><span style="color: #008080;">24</span> <span style="color: #008000;">//另外，5.6版本后可以实现use 函数
</span><span style="color: #008080;">25</span> <span style="color: #008000;">// use func a\call;
</span><span style="color: #008080;">26</span> <span style="color: #008000;">// \a\call();</span>

index.php

<span style="color: #008080;"> 1</span> <span style="color: #000000;">php
</span><span style="color: #008080;"> 2</span> <span style="color: #000000;">namespace a;
</span><span style="color: #008080;"> 3</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> aaa{
</span><span style="color: #008080;"> 4</span>     <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> send(){
</span><span style="color: #008080;"> 5</span>         <span style="color: #0000ff;">echo</span> "ok"<span style="color: #000000;">;
</span><span style="color: #008080;"> 6</span> <span style="color: #000000;">    }
</span><span style="color: #008080;"> 7</span> <span style="color: #000000;">}
</span><span style="color: #008080;"> 8</span> 
<span style="color: #008080;"> 9</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> call(){
</span><span style="color: #008080;">10</span>     <span style="color: #0000ff;">echo</span> "func_use is successful."<span style="color: #000000;">;
</span><span style="color: #008080;">11</span> }

二、使用接口

接口，本来没太懂，看懂了之后简直了，牛逼啊！

一个接口，大家只要遵守接口规定，就都能用，就这么个意思。

下面是一个获得内容的接口示例，还可以写更多基于此接口的模块；（其中，模块中getContent的我基本都不会。。。哭）

<span style="color: #000000;">php
</span><span style="color: #008000;">//</span><span style="color: #008000;">
//Chapter2.P19
//Feature_Interface
//</span>
<span style="color: #000000;">namespace ModernPHP\feature\jiekou;



</span><span style="color: #0000ff;">class</span><span style="color: #000000;"> DocumentStore{
    </span><span style="color: #0000ff;">protected</span> <span style="color: #800080;">$data</span>=<span style="color: #000000;">[];
    
    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span> addDocument(Documentable <span style="color: #800080;">$document</span>){  <span style="color: #008000;">//</span><span style="color: #008000;">这里注明只能使用接口的参数</span>
        <span style="color: #800080;">$key</span>=<span style="color: #800080;">$document</span>-><span style="color: #000000;">getID();
        </span><span style="color: #800080;">$value</span>=<span style="color: #800080;">$document</span>-><span style="color: #000000;">getContent();
        </span><span style="color: #800080;">$this</span>->data[<span style="color: #800080;">$key</span>]=<span style="color: #800080;">$value</span><span style="color: #000000;">;
    }
    
    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> getDocuments(){
        </span><span style="color: #0000ff;">return</span> <span style="color: #800080;">$this</span>-><span style="color: #000000;">data;
    }
}

</span><span style="color: #0000ff;">interface</span> Documentable{     <span style="color: #008000;">//</span><span style="color: #008000;">定义接口，说白了就是定规矩，其他地方要用，就得说一声</span>
    <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> getId();
    
    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> getContent();
}

</span><span style="color: #0000ff;">class</span> HtmlDocument <span style="color: #0000ff;">implements</span> Documentable{   <span style="color: #008000;">//</span><span style="color: #008000;">声明要用接口；这个是获得url的内容的</span>
    <span style="color: #0000ff;">protected</span> <span style="color: #800080;">$url</span><span style="color: #000000;">;
    
    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span> __construct(<span style="color: #800080;">$url</span><span style="color: #000000;">){
        </span><span style="color: #800080;">$this</span>->url=<span style="color: #800080;">$url</span><span style="color: #000000;">;
    }
    
    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> getId(){
        </span><span style="color: #0000ff;">return</span> <span style="color: #800080;">$this</span>-><span style="color: #000000;">url;
    }
    
    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> getContent(){
        </span><span style="color: #800080;">$ch</span>=curl_init();   <span style="color: #008000;">//</span><span style="color: #008000;">这里的curl是针对url进行操作一个库（相当于）。这个命令是开启一个curl对话，所以下面这些都是一个对话</span>
        curl_setopt(<span style="color: #800080;">$ch</span>, CURLOPT_URL, <span style="color: #800080;">$this</span>-><span style="color: #000000;">url);
        curl_setopt(</span><span style="color: #800080;">$ch</span>, CURLOPT_RETURNTRANSFER, 1<span style="color: #000000;">);
        curl_setopt(</span><span style="color: #800080;">$ch</span>,CURLOPT_CONNECTTIMEOUT,3<span style="color: #000000;">);
        curl_setopt(</span><span style="color: #800080;">$ch</span>,CURLOPT_FOLLOWLOCATION,1<span style="color: #000000;">);
        curl_setopt(</span><span style="color: #800080;">$ch</span>,CURLOPT_MAXREDIRS,3<span style="color: #000000;">);
        </span><span style="color: #800080;">$html</span>=curl_exec(<span style="color: #800080;">$ch</span>);   <span style="color: #008000;">//</span><span style="color: #008000;">由这个命令执行刚才的对话</span>
        curl_close(<span style="color: #800080;">$ch</span><span style="color: #000000;">);
        
        </span><span style="color: #0000ff;">return</span> <span style="color: #800080;">$html</span><span style="color: #000000;">;
    }
}




</span><span style="color: #800080;">$documentStore</span>=<span style="color: #0000ff;">new</span><span style="color: #000000;"> DocumentStore();

</span><span style="color: #800080;">$htmlDoc</span>=<span style="color: #0000ff;">new</span> HtmlDocument('http://www.baidu.com'<span style="color: #000000;">);
</span><span style="color: #800080;">$documentStore</span>->addDocument(<span style="color: #800080;">$htmlDoc</span><span style="color: #000000;">);



</span><span style="color: #008080;">print_r</span>(<span style="color: #800080;">$documentStore</span>->getDocuments());

另一个模块

<span style="color: #008080;"> 1</span> <span style="color: #0000ff;">class</span> StreamDocument <span style="color: #0000ff;">implements</span> Documentable{  <span style="color: #008000;">//</span><span style="color: #008000;">流媒体</span>
<span style="color: #008080;"> 2</span>     <span style="color: #0000ff;">protected</span> <span style="color: #800080;">$resource</span><span style="color: #000000;">;
</span><span style="color: #008080;"> 3</span>     <span style="color: #0000ff;">protected</span> <span style="color: #800080;">$buffer</span>;   <span style="color: #008000;">//</span><span style="color: #008000;">缓冲区大小</span>
<span style="color: #008080;"> 4</span>     
<span style="color: #008080;"> 5</span>     <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span> __construct(<span style="color: #800080;">$resource</span>,<span style="color: #800080;">$buffer</span>=4096<span style="color: #000000;">){
</span><span style="color: #008080;"> 6</span>         <span style="color: #800080;">$this</span>-><span style="color: #0000ff;">resource</span>=<span style="color: #800080;">$resource</span><span style="color: #000000;">;
</span><span style="color: #008080;"> 7</span>         <span style="color: #800080;">$this</span>->buffer=<span style="color: #800080;">$buffer</span><span style="color: #000000;">;
</span><span style="color: #008080;"> 8</span> <span style="color: #000000;">    }
</span><span style="color: #008080;"> 9</span>     
<span style="color: #008080;">10</span>     <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> getId(){
</span><span style="color: #008080;">11</span>         <span style="color: #0000ff;">return</span> 'resource-'.(int)<span style="color: #800080;">$this</span>-><span style="color: #0000ff;">resource</span><span style="color: #000000;">;
</span><span style="color: #008080;">12</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">13</span>     
<span style="color: #008080;">14</span>     <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> getContent(){
</span><span style="color: #008080;">15</span>         <span style="color: #800080;">$streamContent</span>=''<span style="color: #000000;">;
</span><span style="color: #008080;">16</span>         <span style="color: #008080;">rewind</span>(<span style="color: #800080;">$this</span>-><span style="color: #0000ff;">resource</span>); <span style="color: #008000;">//</span><span style="color: #008000;">rewind() 函数将文件指针的位置倒回文件的开头</span>
<span style="color: #008080;">17</span>         <span style="color: #0000ff;">while</span> (<span style="color: #008080;">feof</span>(<span style="color: #800080;">$this</span>-><span style="color: #0000ff;">resource</span>)===<span style="color: #0000ff;">false</span>){    <span style="color: #008000;">//</span><span style="color: #008000;">feof() 函数检测是否已到达文件末尾 (eof)。</span>
<span style="color: #008080;">18</span>             <span style="color: #800080;">$streamContent</span>.=<span style="color: #008080;">fread</span>(<span style="color: #800080;">$this</span>-><span style="color: #0000ff;">resource</span>,<span style="color: #800080;">$this</span>-><span style="color: #000000;">buffer);
</span><span style="color: #008080;">19</span> <span style="color: #000000;">        }
</span><span style="color: #008080;">20</span>         
<span style="color: #008080;">21</span>         <span style="color: #0000ff;">return</span> <span style="color: #800080;">$streamContent</span><span style="color: #000000;">;
</span><span style="color: #008080;">22</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">23</span> }

三、性状

奇怪的东西。。。

其实就是为了多重继承或者一对多个不同的类别吧

<span style="color: #008080;"> 1</span> <span style="color: #000000;">php
</span><span style="color: #008080;"> 2</span> <span style="color: #008000;">//</span>
<span style="color: #008080;"> 3</span> <span style="color: #008000;">//Chapter2.P23
</span><span style="color: #008080;"> 4</span> <span style="color: #008000;">//Feature_Trait
</span><span style="color: #008080;"> 5</span> <span style="color: #008000;">//性状
</span><span style="color: #008080;"> 6</span> <span style="color: #008000;">//
</span><span style="color: #008080;"> 7</span> 
<span style="color: #008080;"> 8</span> <span style="color: #008000;">//前面说的接口，是针对同类型的东西，实现相同的功能的；
</span><span style="color: #008080;"> 9</span> <span style="color: #008000;">//这里的性状是针对不同的东西，实现相同的功能
</span><span style="color: #008080;">10</span> 
<span style="color: #008080;">11</span> <span style="color: #008000;">//基本用法如下</span>
<span style="color: #008080;">12</span> <span style="color: #000000;">trait traitName{
</span><span style="color: #008080;">13</span>     <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> testThis(){
</span><span style="color: #008080;">14</span>         <span style="color: #0000ff;">echo</span> "This is how trait works."."<br>"<span style="color: #000000;">;
</span><span style="color: #008080;">15</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">16</span> <span style="color: #000000;">}
</span><span style="color: #008080;">17</span> 
<span style="color: #008080;">18</span> <span style="color: #000000;">trait traitMore{
</span><span style="color: #008080;">19</span>     <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> testAgain(){
</span><span style="color: #008080;">20</span>         <span style="color: #0000ff;">echo</span> "This is multiple use."."<br>"<span style="color: #000000;">;
</span><span style="color: #008080;">21</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">22</span> <span style="color: #000000;">}
</span><span style="color: #008080;">23</span> 
<span style="color: #008080;">24</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> className{
</span><span style="color: #008080;">25</span>     <span style="color: #0000ff;">use</span><span style="color: #000000;"> traitName;
</span><span style="color: #008080;">26</span>     <span style="color: #0000ff;">use</span><span style="color: #000000;"> traitMore;
</span><span style="color: #008080;">27</span>     
<span style="color: #008080;">28</span> <span style="color: #000000;">}
</span><span style="color: #008080;">29</span> 
<span style="color: #008080;">30</span> <span style="color: #800080;">$classMine</span>=<span style="color: #0000ff;">new</span><span style="color: #000000;"> className();
</span><span style="color: #008080;">31</span> <span style="color: #800080;">$classMine</span>-><span style="color: #000000;">testThis();
</span><span style="color: #008080;">32</span> <span style="color: #800080;">$classMine</span>->testAgain();

四、生成器

直接上代码

<span style="color: #008080;"> 1</span> <span style="color: #000000;">php
</span><span style="color: #008080;"> 2</span> <span style="color: #008000;">//</span>
<span style="color: #008080;"> 3</span> <span style="color: #008000;">//Chapter2.P26
</span><span style="color: #008080;"> 4</span> <span style="color: #008000;">//Feature_Generator
</span><span style="color: #008080;"> 5</span> <span style="color: #008000;">//生成器
</span><span style="color: #008080;"> 6</span> <span style="color: #008000;">//
</span><span style="color: #008080;"> 7</span> 
<span style="color: #008080;"> 8</span> <span style="color: #008000;">//其实就是在函数中使用了yield语句的东西
</span><span style="color: #008080;"> 9</span> <span style="color: #008000;">//优点在于节省了内存使用情况
</span><span style="color: #008080;">10</span> <span style="color: #008000;">//方法是通过动态分配内存进行循环操作
</span><span style="color: #008080;">11</span> <span style="color: #008000;">//典型用处是处理csv类数据文件</span>
<span style="color: #008080;">12</span> 
<span style="color: #008080;">13</span> <span style="color: #000000;">namespace ModernPHP\feature\shengchegnqi;
</span><span style="color: #008080;">14</span> 
<span style="color: #008080;">15</span> <span style="color: #0000ff;">function</span> getRows(<span style="color: #800080;">$file</span><span style="color: #000000;">){
</span><span style="color: #008080;">16</span>     <span style="color: #800080;">$handle</span>=<span style="color: #008080;">fopen</span>(<span style="color: #800080;">$file</span>,'rb'<span style="color: #000000;">);
</span><span style="color: #008080;">17</span>     <span style="color: #0000ff;">if</span> (<span style="color: #800080;">$handle</span>===<span style="color: #0000ff;">false</span><span style="color: #000000;">){
</span><span style="color: #008080;">18</span>         <span style="color: #0000ff;">throw</span> <span style="color: #0000ff;">new</span> <span style="color: #0000ff;">Exception</span>();  <span style="color: #008000;">//</span><span style="color: #008000;">抛出错误原因</span>
<span style="color: #008080;">19</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">20</span>     <span style="color: #0000ff;">while</span> (<span style="color: #008080;">feof</span>(<span style="color: #800080;">$handle</span>)===<span style="color: #0000ff;">false</span><span style="color: #000000;">) {
</span><span style="color: #008080;">21</span>         yield <span style="color: #008080;">fgetcsv</span>(<span style="color: #800080;">$handle</span><span style="color: #000000;">);
</span><span style="color: #008080;">22</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">23</span>     <span style="color: #008080;">fclose</span>(<span style="color: #800080;">$handle</span><span style="color: #000000;">);
</span><span style="color: #008080;">24</span> <span style="color: #000000;">}
</span><span style="color: #008080;">25</span> 
<span style="color: #008080;">26</span> <span style="color: #0000ff;">foreach</span> (getRows('data.csv') <span style="color: #0000ff;">as</span> <span style="color: #800080;">$row</span><span style="color: #000000;">){
</span><span style="color: #008080;">27</span>     <span style="color: #008080;">print_r</span>(<span style="color: #800080;">$row</span><span style="color: #000000;">);
</span><span style="color: #008080;">28</span>     <span style="color: #0000ff;">echo</span> "<br>"<span style="color: #000000;">;
</span><span style="color: #008080;">29</span> <span style="color: #000000;">}
</span><span style="color: #008080;">30</span> <span style="color: #008000;">//</span><span style="color: #008000;">当数据文件很大时，效果尤其明显</span>

五、闭包

这里闭包基本等于匿名函数

<span style="color: #008080;"> 1</span> <span style="color: #000000;">php
</span><span style="color: #008080;"> 2</span> <span style="color: #008000;">//</span>
<span style="color: #008080;"> 3</span> <span style="color: #008000;">//Chapter2.P29
</span><span style="color: #008080;"> 4</span> <span style="color: #008000;">//Feature_ClosePatch
</span><span style="color: #008080;"> 5</span> <span style="color: #008000;">//闭包或匿名函数
</span><span style="color: #008080;"> 6</span> <span style="color: #008000;">//
</span><span style="color: #008080;"> 7</span> 
<span style="color: #008080;"> 8</span> <span style="color: #008000;">//把函数当作是变量
</span><span style="color: #008080;"> 9</span> <span style="color: #008000;">//然后它就可以像变量一样用来用去了。。
</span><span style="color: #008080;">10</span> <span style="color: #008000;">//常用做函数和方法的回调</span>
<span style="color: #008080;">11</span> 
<span style="color: #008080;">12</span> <span style="color: #000000;">namespace ModernPHP\feature\bibao;
</span><span style="color: #008080;">13</span> <span style="color: #800080;">$var</span>=<span style="color: #0000ff;">function</span> (<span style="color: #800080;">$name</span><span style="color: #000000;">){
</span><span style="color: #008080;">14</span>     <span style="color: #0000ff;">return</span> <span style="color: #008080;">sprintf</span>('Hello %s',<span style="color: #800080;">$name</span><span style="color: #000000;">);
</span><span style="color: #008080;">15</span> <span style="color: #000000;">};
</span><span style="color: #008080;">16</span> 
<span style="color: #008080;">17</span> <span style="color: #0000ff;">echo</span> <span style="color: #800080;">$var</span>('Andy'<span style="color: #000000;">);
</span><span style="color: #008080;">18</span> 
<span style="color: #008080;">19</span> <span style="color: #008000;">//</span><span style="color: #008000;">做回调</span>
<span style="color: #008080;">20</span> <span style="color: #800080;">$array</span>=[2,3,4<span style="color: #000000;">];
</span><span style="color: #008080;">21</span> <span style="color: #800080;">$num</span>=<span style="color: #008080;">array_map</span>(<span style="color: #0000ff;">function</span> (<span style="color: #800080;">$number</span>){  <span style="color: #008000;">//</span><span style="color: #008000;">array_map,将函数作用到数组中的每个值上，每个值都乘以本身，并返回带有新值的数组</span>
<span style="color: #008080;">22</span>     <span style="color: #0000ff;">return</span> <span style="color: #800080;">$number</span>+1<span style="color: #000000;">;
</span><span style="color: #008080;">23</span> },<span style="color: #800080;">$array</span><span style="color: #000000;">);
</span><span style="color: #008080;">24</span> <span style="color: #008080;">print_r</span>(<span style="color: #800080;">$num</span>);

六、附加状态

这个没搞懂。。。

（二）标准

PHP-FIG的一些约定俗成；

---类名称，驼峰式，ShitHappens

---方法名称，驼峰式，但首字母小写，shitHappens

---缩进统一为4个空格

---不写?>结束符号；

---{另起一行；

---命名空间要有空格；

---类中属性和方法必须有可见性声明；

---if等控制性结构后面有空格；

<span style="color: #008080;"> 1</span> <span style="color: #000000;">php
</span><span style="color: #008080;"> 2</span> <span style="color: #008000;">//</span>
<span style="color: #008080;"> 3</span> <span style="color: #008000;">//Chapter3.P44
</span><span style="color: #008080;"> 4</span> <span style="color: #008000;">//PHP-FIG puts PSRs
</span><span style="color: #008080;"> 5</span> <span style="color: #008000;">//</span>
<span style="color: #008080;"> 6</span> 
<span style="color: #008080;"> 7</span> <span style="color: #000000;">namespace ModernPHP\standard\realize;
</span><span style="color: #008080;"> 8</span> 
<span style="color: #008080;"> 9</span> <span style="color: #0000ff;">use</span><span style="color: #000000;"> ModernPHP\feature\bibao;
</span><span style="color: #008080;">10</span> <span style="color: #0000ff;">use</span><span style="color: #000000;"> ModernPHP\feature\fujiazhuangtai;
</span><span style="color: #008080;">11</span> 
<span style="color: #008080;">12</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> ShitHappens
</span><span style="color: #008080;">13</span> <span style="color: #000000;">{
</span><span style="color: #008080;">14</span>     <span style="color: #0000ff;">public</span> <span style="color: #800080;">$a</span><span style="color: #000000;">;
</span><span style="color: #008080;">15</span>     
<span style="color: #008080;">16</span>     <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> suck()
</span><span style="color: #008080;">17</span> <span style="color: #000000;">    {
</span><span style="color: #008080;">18</span>         <span style="color: #0000ff;">if</span> (<span style="color: #800080;">$this</span>->a===<span style="color: #0000ff;">false</span><span style="color: #000000;">){
</span><span style="color: #008080;">19</span>             <span style="color: #0000ff;">return</span> <span style="color: #0000ff;">true</span><span style="color: #000000;">;
</span><span style="color: #008080;">20</span> <span style="color: #000000;">        }
</span><span style="color: #008080;">21</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">22</span> }

----------------------

后面的都是讲述的东西，有需要的我再写吧。

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