php面向对象编程之析构方法
前面我们知道了什么叫构造方法。与构造方法对应的就是析构方法，析构方法允许在销毁一个类之前执行的一些操作或完成一些功能，比如说关闭文件、释放结果集等。析构方法是PHP5才引进的新内容。
析造方法的声明格式与构造方法”
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