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 $this->age.'
'.$this->name.'
'.$this->sex.'
';
} function func(){
echo $this->age.'
'.$this->name.'
'.$this->sex.'
';
}
}
$P=new Test();
echo '
';
$P->age=100;
$P->name="Rainy";
$P->sex="female";
$P->func();
?>
Public
public $name='Janking',
$sex='male',
$age=23; function __construct(){
echo $this->age.'
'.$this->name.'
'.$this->sex.'
';
} function func(){
echo $this->age.'
'.$this->name.'
'.$this->sex.'
';
}
}
$P=new Test();
echo '
';
$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',
$age=23; function __construct(){
$this->funcOne();
} function func(){
echo $this->age.'
'.$this->name.'
'.$this->sex.'
';
} private function funcOne(){
echo $this->age.'
'.$this->name.'
'.$this->sex.'
';
}
}
$P=new Test();
echo '
';
$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
private $name='Janking',
$age=23; function __construct(){
$this->funcOne();
} function func(){
echo $this->age.'
'.$this->name.'
'.$this->sex.'
';
} private function funcOne(){
echo $this->age.'
'.$this->name.'
'.$this->sex.'
';
}
}
$P=new Test();
echo '
';
$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：
属性值时，自动调用的方法__get()：是直接获取私有成员属性值时，自动调用的方法__isset(); 是直接isset查看对象中私有属性是否存时自动调用这个方法__unset(); 是直接unset删除对象中私有属性时，自动调用的方法
原文链接：https://www.f2er.com/php/26562.html