PHP笔记之:基于面向对象设计的详解 |
本文标签:php,面向对象 public 表示全局,类内部外部子类都可以访问; 复制代码 代码如下: <?php class Test{ public $name=Janking, $sex=male, $age=23; function __construct(){ echo $this->age.<br />.$this->name.<br />.$this->sex.<br />; } function func(){ echo $this->age.<br />.$this->name.<br />.$this->sex.<br />; } } $P=new Test(); echo <br /><br />; $P->age=100; $P->name="Rainy"; $P->sex="female"; $P->func(); ?> Public private表示私有的,只有本类内部可以使用; 复制代码 代码如下: <?php class Test{ private $name=Janking, $sex=male, $age=23; function __construct(){ $this->funcOne(); } function func(){ echo $this->age.<br />.$this->name.<br />.$this->sex.<br />; } private function funcOne(){ echo $this->age.<br />.$this->name.<br />.$this->sex.<br />; } } $P=new Test(); echo <br /><br />; $P->func(); $P->age=100; // Cannot access private property Test::$age $P->name="Rainy"; // Cannot access private property Test::$name $P->sex="female"; // Cannot access private property Test::$female $P->funcOne(); // Call to private method Test::funcOne() from context ?> Private protected表示受保护的,只有本类或子类或父类中可以访问; 和封装有关的魔术方法: __set():是直接设置私有成员属性值时,自动调用的方法 |