关于PHP构造函数使用方法揭秘_PHP教程

<OL class=dp-xml><LI class=alt><SPAN><SPAN>//创建一个人类  </SPAN></SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>0class Person   </SPAN><LI class=""><SPAN>0{   </SPAN><LI class=alt><SPAN>//下面是人的成员属性   </SPAN><LI class=""><SPAN>var $name;       //人的名子   </SPAN><LI class=alt><SPAN>var $sex;        //人的性别   </SPAN><LI class=""><SPAN>var $age;        //人的年龄   </SPAN><LI class=alt><SPAN>//定义一个构造方法参数为姓名$name、性别$sex和年龄$age   </SPAN><LI class=""><SPAN>function __construct($name, $sex, $age)   </SPAN><LI class=alt><SPAN>{   </SPAN><LI class=""><SPAN>//通过构造方法传进来的$name给成员属性$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>name赋初使值   </SPAN></SPAN><LI class=alt><SPAN>$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN class=attribute><FONT color=#ff0000>name</FONT></SPAN><SPAN>=$name;   </SPAN></SPAN><LI class=""><SPAN>//通过构造方法传进来的$sex给成员属性$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>sex赋初使值   </SPAN></SPAN><LI class=alt><SPAN>$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN class=attribute><FONT color=#ff0000>sex</FONT></SPAN><SPAN>=$sex;   </SPAN></SPAN><LI class=""><SPAN>//通过构造方法传进来的$age给成员属性$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>age赋初使值   </SPAN></SPAN><LI class=alt><SPAN>$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN class=attribute><FONT color=#ff0000>age</FONT></SPAN><SPAN>=$age;   </SPAN></SPAN><LI class=""><SPAN>}   </SPAN><LI class=alt><SPAN>//这个人的说话方法   </SPAN><LI class=""><SPAN>function say()   </SPAN><LI class=alt><SPAN>{  </SPAN><LI class=""><SPAN>echo "我的名子叫：".$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>name." 性别：".$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>sex." 我的年龄是：".$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>age."</SPAN><STRONG><FONT color=#006699><SPAN class=tag><</SPAN><SPAN class=tag-name>br</SPAN><SPAN class=tag>></SPAN></FONT></STRONG><SPAN>";   </SPAN></SPAN><LI class=alt><SPAN>}   </SPAN><LI class=""><SPAN>}   </SPAN><LI class=alt><SPAN>//通过构造方法创建3个对象$p1、p2、$p3,分别传入三个不同的实参为姓名、性别和年龄  </SPAN><LI class=""><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>p1</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>new</FONT></SPAN><SPAN> Person("张三","男", 20);   </SPAN></SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>p2</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>new</FONT></SPAN><SPAN> Person("李四","女", 30);   </SPAN></SPAN><LI class=""><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>p3</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>new</FONT></SPAN><SPAN> Person("王五","男", 40);   </SPAN></SPAN><LI class=alt><SPAN>//下面访问$p1对象中的说话方法   </SPAN><LI class=""><SPAN>$p1-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>say();   </SPAN></SPAN><LI class=alt><SPAN>//下面访问$p2对象中的说话方法   </SPAN><LI class=""><SPAN>$p2-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>say();   </SPAN></SPAN><LI class=alt><SPAN>//下面访问$p3对象中的说话方法   </SPAN><LI class=""><SPAN>$p3-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>say();   </SPAN></SPAN></LI></OL>