我们大家有知道PHP串行化可以把变量包括对象，转化成连续bytes数据，你可以将串行化后的变量存在一个文件里或在网络上传输，然后再反串行化还原为原来的数据。文章这里就PHP串行化为大家详细的介绍。你在反串行化类的对象之前定义的类，PHP可以成功地存储其对象的属性和方法. 有时你可能需要一个对象在反串行化后立即执行。为了这样的目的，PHP会自动寻找__sleep和__wakeup方法。
<ol class="dp-xml">
<li class="alt"><span><span>Listing1 Object serialization </span></span></li>
<li class=""><span>class User </span></li>
<li class="alt"><span>{ </span></li>
<li class=""><span>public $name; </span></li>
<li class="alt"><span>public $id; </span></li>
<li class=""><span>function __construct() </span></li>
<li class="alt"><span>{ </span></li>
<li class=""><span>//give user a unique ID 赋予一个不同的ID </span></li>
<li class="alt">
<span>$this-＞</span><span class="attribute"><font color="#ff0000">id</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">uniqid</font></span><span>(); </span>
</li>
<li class=""><span>} </span></li>
<li class="alt"><span>function __sleep() </span></li>
<li class=""><span>{ </span></li>
<li class="alt"><span>//do not serialize this-＞id 不串行化id </span></li>
<li class=""><span>return(array("name")); </span></li>
<li class="alt"><span>} </span></li>
<li class=""><span>function __wakeup() </span></li>
<li class="alt"><span>{ </span></li>
<li class=""><span>//give user a unique ID </span></li>
<li class="alt">
<span>$this-＞</span><span class="attribute"><font color="#ff0000">id</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">uniqid</font></span><span>(); </span>
</li>
<li class=""><span>} </span></li>
<li class="alt"><span>} </span></li>
<li class=""><span>//create object 建立一个对象 </span></li>
<li class="alt">
<span>$</span><span class="attribute"><font color="#ff0000">u</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">new</font></span><span> User; </span>
</li>
<li class="">
<span>$u-＞</span><span class="attribute"><font color="#ff0000">name</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">"Leon"</font></span><span>; </span>
</li>
<li class="alt"><span>//serialize it 串行化 注意不串行化id属性，id的值被抛弃 </span></li>
<li class="">
<span>$</span><span class="attribute"><font color="#ff0000">s</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">serialize</font></span><span>($u); </span>
</li>
<li class="alt"><span>//unserialize it 反串行化 id被重新赋值 </span></li>
<li class="">
<span>$</span><span class="attribute"><font color="#ff0000">u2</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">unserialize</font></span><span>($s); </span>
</li>
<li class="alt"><span>//$u and $u2 have different IDs $u和$u2有不同的ID </span></li>
<li class=""><span>print_r($u); </span></li>
<li class="alt"><span>print_r($u2); </span></li>
<li class=""><span>?＞ </span></li>
</ol>
