php 对象示例

 <?php
 header("content-type:text/html; charset=utf-8");
 error_reporting(E_ALL);

 class MyClass {

     var $id;//声明变量

     function __construct($name){
         echo "构造函数:类被实例化后自动调用<br/>";
         $this->name = $name;//声明并初始化变量
     }

     function printer($con){
         echo isset($con) ? $con : "空";
         echo "<br/>";
     }

     function sayName(){
         echo $this->name;
         echo "<br/>";
     }

     function getID(){
         return $this->id;
     }

     function __destruct(){
         echo "析构函数:对象结束生命周期时自动调用";
     }

 }

 $obj = new MyClass("weihexin");

 $obj->sayName();

 $obj->printer($obj->getID());