PHP笔记之:基于面向对象设计的详解

public 表示全局，类内部外部子类都可以访问；
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；
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 ''