立即学习“PHP免费学习笔记（深入）”；
PHP还是比较常用的，于是我研究了一下PHP对象序列化，在这里拿出来和大家分享一下，希望对大家有用。PHP对象序列化也是一个比较普遍的功能，能够把一个对象进行串行化以后变成一个字符串，能够保存或者传输。我们先看一个例子：
<ol class="dp-xml"><li class="alt"><span><span>classTestClass </span></span></li><li class=""><span>{ </span></li><li class="alt"><span>var$a; </span></li><li class=""><span>var$b; </span></li><li class="alt"><span> </span></li><li class=""><span>functionTestClass() </span></li><li class="alt"><span>{ </span></li><li class=""><span>$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span class="attribute"><font color="#ff0000">a</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">"Thisisa"</font></span><span>; </span></li><li class="alt"><span>$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span class="attribute"><font color="#ff0000">b</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">"Thisisb"</font></span><span>; </span></li><li class=""><span>} </span></li><li class="alt"><span> </span></li><li class=""><span>functiongetA() </span></li><li class="alt"><span>{ </span></li><li class=""><span>return$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>a; </span></li><li class="alt"><span>} </span></li><li class=""><span> </span></li><li class="alt"><span>functiongetB() </span></li><li class=""><span>{ </span></li><li class="alt"><span>return$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>b; </span></li><li class=""><span>} </span></li><li class="alt"><span>} </span></li><li class=""><span>$</span><span class="attribute"><font color="#ff0000">obj</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">newTestClass</font></span><span>; </span></li><li class="alt"><span>$</span><span class="attribute"><font color="#ff0000">str</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">serialize</font></span><span>($obj); </span></li><li class=""><span>echo$str; </span></li></ol>输出结果：
<ol class="dp-xml"><li class="alt"><span><span>O:9:"TestClass":2:{s:1:"a";s:9:"Thisisa";s:1:"b";s:9:"Thisisb";} </span></span></li></ol>我们来分析一个对象串行化之后的字符串。
<ol class="dp-xml"><li class="alt"><span><span>O:9:"TestClass":2: </span></span></li><li class=""><span>{ </span></li><li class="alt"><span>s:1:"a";s:9:"Thisisa"; </span></li><li class=""><span>s:1:"b";s:9:"Thisisb"; </span></li><li class="alt"><span>} </span></li></ol>
立即学习“PHP免费学习笔记（深入）”；
首先看对于对象本身的内容：O:9:"TestClass":2:O是说明这是一个对象类型（object），然后9是代表对象的名字查过浓度，2是代表该对象有几个属性。在看两个属性的内容：s:1:"a";s:9:"Thisisa";其实跟数组的内容比较类似，第一项：s:1:"a";是描述属性名称的，第二项s:9:"Thisisa";是描述属性值的。后面的属性类似。先说一种PHP对象序列化的应用，下面的内容是PHP手册上，没有更改原文。serialize()返回一个字符串，包含着可以储存于PHP的任何值的字节流表示。unserialize()可以用此字符串来重建原始的变量值。用序列化来保存对象可以保存对象中的所有变量。对象中的函数不会被保存，只有类的名称。
要能够unserialize()一个对象，需要定义该对象的类。也就是，如果序列化了page1.php中类A的对象$a，将得到一个指向类A的字符串并包含有所有$a中变量的值。如果要在page2.php中将其解序列化，重建类A的对象$a，则page2.php中必须要出现类A的定义。这可以例如这样实现，将类A的定义放在一个包含文件中，并在page1.php和page2.php都包含此文件。
<ol class="dp-xml"><li class="alt"><span><strong><font color="#006699"><span class="tag"><?</span><span class="tag-name">php</span></font></strong><span> </span></span></li><li class=""><span>//classa.inc: </span></li><li class="alt"><span>classA </span></li><li class=""><span>{ </span></li><li class="alt"><span>var$</span><span class="attribute"><font color="#ff0000">one</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">1</font></span><span>; </span></li><li class=""><span> </span></li><li class="alt"><span>functionshow_one() </span></li><li class=""><span>{ </span></li><li class="alt"><span>echo$this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>one; </span></li><li class=""><span>} </span></li><li class="alt"><span>} </span></li><li class=""><span> </span></li><li class="alt"><span>//page1.php: </span></li><li class=""><span>include("classa.inc"); </span></li><li class="alt"><span> </span></li><li class=""><span>$</span><span class="attribute"><font color="#ff0000">a</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">newA</font></span><span>; </span></li><li class="alt"><span>$</span><span class="attribute"><font color="#ff0000">s</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">serialize</font></span><span>($a); </span></li><li class=""><span>//将$s存放在某处使page2.php能够找到 </span></li><li class="alt"><span>$</span><span class="attribute"><font color="#ff0000">fp</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">fopen</font></span><span>("store","w"); </span></li><li class=""><span>fputs($fp,$s); </span></li><li class="alt"><span>fclose($fp); </span></li><li class=""><span> </span></li><li class="alt"><span>//page2.php: </span></li><li class=""><span>//为了正常解序列化需要这一行 </span></li><li class="alt"><span>include("classa.inc"); </span></li><li class=""><span> </span></li><li class="alt"><span>$</span><span class="attribute"><font color="#ff0000">s</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">implode</font></span><span>("",@file("store")); </span></li><li class=""><span>$</span><span class="attribute"><font color="#ff0000">a</font></span><span>=</span><span class="attribute-value"><font color="#0000ff">unserialize</font></span><span>($s); </span></li><li class="alt"><span> </span></li><li class=""><span>//现在可以用$a对象的show_one()函数了 </span></li><li class="alt"><span>$a-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>show_one(); </span></li><li class=""><span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span> </span></li></ol>
