【PHP构造方法和析构方法的使用】

构造方法：__construct，析构方法：__destruct

代码示例：

 <?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);
 ?>