PHP5 像使用数组一样使用Memcache

作者:张立冰 出处:http://www.libing.name/2008/03/13/php5-memcache-array.html 我们经常使用Memcache来做数据的缓存,比如大的分布式的应用的会话数据的保存等,每次使用Memcache进行数据的操作都必须依赖于Memcache提供的API,对象的创建,方法的调用等,虽然

作者:张立冰
出处:http://www.libing.name/2008/03/13/php5-memcache-array.html

我们经常使用Memcache来做数据的缓存,比如大的分布式的应用的会话数据的保存等,每次使用Memcache进行数据的操作都必须依赖于Memcache提供的API,对象的创建,方法的调用等,虽然就几个API,使用起来也挺方便的,但再没有像使用数组这么方便来使用你的Memcache了.

At PHPClasses:http://www.phpclasses.org/browse/package/4071.html

在PHP5里,可以方便的帮我们实现了(基于SPL).几小时的工作,可能有些小BUG,欢迎反馈.:)

 <span>/**<br> * mem.class.php -- Class used to access memcache server as array.<br> *<br> * Written by roast (roast_AT_php_DOT_net).<br> *<br> * Feel free to email me with questions/bugs.<br> * If you find this useful, would be great to hear from you.<br> *<br> * version 1.0 -<br> *<br> * Changes:<br> *  - First release.<br> *<br> * Example:<br> *<br> *    include("mem.class.php");<br> *<br> *    //global variable $_MEM<br> *<br> *    $_MEM['dd'] = "roast";  //memcache::set<br> *    unset($_MEM['dd']);     //memcache::delete<br> *<br> *    var_dump($_MEM['dd']);<br> *<br> * Notes:<br> *  - Protect keys of memcache: _host/_port/_compress/_expire.<br> *  - PHP version 5.0+<br> */</span>        <br> <br><span>class</span> _MEM implements ArrayAccess<br><span>{</span><br>    <span>private</span> <span>$_data</span> <span>=</span> <span>array</span><span>(</span><span>)</span><span>;</span>      <br> <br>    <span>private</span> <span>$_handler</span> <span>=</span> <span>false</span><span>;</span>     <br> <br>    <span>public</span>  <span>$_host</span><span>;</span>    <br> <br>    <span>public</span>  <span>$_port</span> <span>=</span> <span>11211</span><span>;</span>    <br> <br>    <span>public</span>  <span>$_compress</span> <span>=</span> <span>false</span><span>;</span>    <br> <br>    <span>public</span>  <span>$_expire</span> <span>=</span> <span>30</span><span>;</span>         <br> <br>    <span>public</span> <span>function</span> __construct<span>(</span><span>$host</span><span>,</span><span>$port</span> <span>=</span> <span>11211</span><span>)</span><br>    <span>{</span><br>        <span>$this</span><span>-&</span>gt<span>;</span>_host <span>=</span> <span>$host</span><span>;</span><br>        <span>$this</span><span>-&</span>gt<span>;</span>_port <span>=</span> <span>$port</span><span>;</span><br>        <span>$this</span><span>-&</span>gt<span>;</span>_handler <span>=</span> <span>new</span> Memcache<span>;</span>     <br> <br>        <span>if</span> <span>(</span><span>!</span><span>$this</span><span>-&</span>gt<span>;</span>_handler<span>-&</span>gt<span>;</span>connect<span>(</span><span>$host</span><span>,</span><span>$port</span><span>)</span><span>)</span><br>            <span>$this</span><span>-&</span>gt<span>;</span>_handler <span>=</span> <span>false</span><span>;</span><br>    <span>}</span>          <br> <br>    <span>public</span> <span>function</span> offsetExists<span>(</span><span>$offset</span><span>)</span> <span>{</span><span>}</span>       <br> <br>    <span>public</span> <span>function</span> offsetUnset<span>(</span><span>$offset</span><span>)</span><br>    <span>{</span><br>        <span>$this</span><span>-&</span>gt<span>;</span>_handler<span>-&</span>gt<span>;</span>delete<span>(</span><span>$offset</span><span>)</span><span>;</span><br>        <span>unset</span><span>(</span><span>$this</span><span>-&</span>gt<span>;</span>_data<span>[</span><span>$offset</span><span>]</span><span>)</span><span>;</span><br>    <span>}</span>      <br> <br>    <span>public</span> <span>function</span> offsetGet<span>(</span><span>$offset</span><span>)</span><br>    <span>{</span><br>        <span>if</span> <span>(</span><span>!</span><span>$this</span><span>-&</span>gt<span>;</span>_handler<span>)</span><br>            <span>return</span> <span>false</span><span>;</span><br>                    <span>echo</span> <span>'get'</span><span>;</span><br>        <span>if</span> <span>(</span><span>isset</span><span>(</span><span>$this</span><span>-&</span>gt<span>;</span>_data<span>[</span><span>$offset</span><span>]</span><span>)</span><span>)</span><br>            <span>return</span> <span>$this</span><span>-&</span>gt<span>;</span>_data<span>[</span><span>$offset</span><span>]</span><span>;</span><br>        <span>else</span><br>            <span>return</span> <span>$this</span><span>-&</span>gt<span>;</span>_handler<span>-&</span>gt<span>;</span>get<span>(</span><span>$offset</span><span>)</span><span>;</span><br>    <span>}</span>      <br> <br>    <span>public</span> <span>function</span> offsetSet<span>(</span><span>$offset</span><span>,</span> <span>$value</span><span>)</span><br>    <span>{</span><br>        <span>if</span> <span>(</span><span>!</span><span>$this</span><span>-&</span>gt<span>;</span>_handler<span>)</span><br>            <span>return</span> <span>false</span><span>;</span>      <br> <br>        <span>switch</span> <span>(</span><span>$offset</span><span>)</span><br>        <span>{</span><br>            <span>case</span> <span>'_host'</span><span>:</span>       <span>$this</span><span>-&</span>gt<span>;</span>_host <span>=</span> <span>$value</span><span>;</span>  <span>break</span><span>;</span><br>            <span>case</span> <span>'_port'</span><span>:</span>       <span>$this</span><span>-&</span>gt<span>;</span>_port <span>=</span> <span>$value</span><span>;</span>  <span>break</span><span>;</span><br>            <span>case</span> <span>'_expire'</span><span>:</span>     <span>$this</span><span>-&</span>gt<span>;</span>_expire <span>=</span> <span>$value</span><span>;</span>break<span>;</span><br>            <span>case</span> <span>'_compress'</span><span>:</span>   <span>$this</span><span>-&</span>gt<span>;</span>_host <span>=</span> <span>$value</span><span>;</span>  <span>break</span><span>;</span><br>            <span>default</span><span>:</span><br>                <span>if</span> <span>(</span>emptyempty<span>(</span><span>$value</span><span>)</span> <span>&</span>amp<span>;&</span>amp<span>;</span> <span>$value</span> <span>!=</span> <span>'0'</span><span>)</span><br>                    <span>$this</span><span>-&</span>gt<span>;</span>_handler<span>-&</span>gt<span>;</span>delete<span>(</span><span>$offset</span><span>)</span><span>;</span><br>                <span>else</span><br>                    <span>$this</span><span>-&</span>gt<span>;</span>_handler<span>-&</span>gt<span>;</span>set<span>(</span><span>$offset</span><span>,</span><span>$value</span><span>,</span><span>$this</span><span>-&</span>gt<span>;</span>_compress<span>,</span><span>$this</span><span>-&</span>gt<span>;</span>_expire<span>)</span><span>;</span><br>        <span>}</span><br>         <span>$this</span><span>-&</span>gt<span>;</span>_data<span>[</span><span>$offest</span><span>]</span> <span>=</span> <span>$value</span><span>;</span><br>    <span>}</span><br><span>}</span><br><span>$_MEM</span> <span>=</span> <span>new</span> _MEM<span>(</span><span>'10.210.71.51'</span><span>)</span><span>;</span>

举个小例子:

<span>include_once</span><span>(</span><span>'mem.class.php'</span><span>)</span>  <span>;</span>       <br> <br><span>$_MEM</span><span>[</span><span>'dd'</span><span>]</span> <span>=</span> <span>"roast"</span><span>;</span><br><span>unset</span><span>(</span><span>$_MEM</span><span>[</span><span>'dd'</span><span>]</span><span>)</span><span>;</span>               <span>//delete a memcache value</span><br><span>var_dump</span><span>(</span><span>$_MEM</span><span>[</span><span>'dd'</span><span>]</span><span>)</span><span>;</span>                 <br> <br><span>echo</span> <span>$_MEM</span><span>-&</span>gt<span>;</span>_host<span>;</span><br><span>$_MEM</span><span>[</span><span>'_host'</span><span>]</span> <span>=</span> <span>'192.168.1.1'</span><span>;</span>   <span>//set the memcache server host</span><br><span>echo</span> <span>$_MEM</span><span>-&</span>gt<span>;</span>_host<span>;</span>      <br> <br><span>$_MEM</span><span>[</span><span>'roast'</span><span>]</span> <span>=</span> <span>'张立冰'</span><span>;</span><br><span>$memcache</span> <span>=</span> <span>new</span> Memcache<span>;</span><br><span>$memcache</span><span>-&</span>gt<span>;</span>connect<span>(</span><span>'10.210.71.51'</span><span>,</span> <span>11211</span><span>)</span> or <span>die</span> <span>(</span><span>"Could not connect"</span><span>)</span><span>;</span><br><span>var_dump</span><span>(</span><span>$memcache</span><span>-&</span>gt<span>;</span>get<span>(</span><span>'roast'</span><span>)</span><span>)</span><span>;</span>

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