php中$this->是什么意义
php中$this->是什么意思?
$this 的含义表示什么,实例化后的具体对象!
我们一般是先声明一个类,然后用这个类去实例化对象!
但是,当我们在声明这个类的时候,想在类本身内部使用本类的属性或者方法。应该怎么表示呢?
例如:
我们声明一个User类!它只含有一个属性$name;
classname
{
public $_name;
}
现在我们给User类加个方法。使用getName()方法,输出$name属性的值吧!复制php内容到剪贴板
php代码:
class User
{
public $name;
function getName()
{
echo $this->name;
}
}
//如何使用呢?
$user1=new User();
$user1->name='张三';
$user1->getName();
$user2=new User();
$user2->name='李四';
$user2-getName();
怎么理解呢?
我上面创建了两个User对象。分别是$user1和$user2.
当我调用$user1->getName()的时候。上面User类中的代码echo $this->name ;就是相当于是echo $user1->name;
大概就是这个意思!
其实,你也不要去钻牛角尖。你只要知道那是一个用来表示类内部的属性和方法的代号就好了!越想越糊涂的!

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