<?php

     class Person

     {

         public $name;

         public $age;

         public function __construct($name,$age)

         {

             $this->name=$name;

             $this->age=$age;

         }

         public function showInformation()

         {

             echo "<br/>姓名：".$this->name;

             echo "<br/>年龄：".$this->age;

         }

         public function __destruct()

         {

             echo "<br/>释放资源".$this->name;

         }

     }

     $zhangsan=new Person("张三",12);

     //$temp=$zhangsan;

     $zhangsan=null;

     $lisi=new Person("李四",13);

     $wangwu=new Person("王五",14);

 ?>