面向对象的封装性:

1,就是把对象的成员(属性,方法)结合成一个独立的相同单位,并尽可能隐藏对象的内部细节

public protected

private 私有的,用这个关键字修饰的成员,只能在对象内部访问(只有用$this访问),不能在对象外部使用

 

示例:

 

class person{  
private $name;  
private $age;  
private $sex;  
function __construct($name="",$age=20,$sex="male"){  
$this->name=$name;  
$this->age=$age;  
$this->sex=$sex;  
}  
function getpro($name){  
return $this->$name;  
}  
function setage($age){  
if($age>100||$age<0){  
return;  
}  
$this->age=$age;  
}  
function getage(){  
if($this->age<30){  
return $this->age;  
}elseif($this->age<40){  
return $this->age-5;  
}elseif($this->age<50){  
return $this->age-10;  
}else{  
return $this->age-15;  
}  
}  
function say(){  
echo "我的名字是:".$this->name.",年龄是:".$this->age.",性别是:".$this->sex.'<br>';  
}  
function __destruct(){  
echo $this->name.",再见"."<br>";  
}  
}  
$p1=new person("rayhooo",26,"male");  
$p1->say();  
echo $p1->getpro("name").'<br>';  
$p1->setage(45);  
echo $p1->getage().'<br>';