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php中$this->含义分析_PHP

Jun 01, 2016 pm 12:22 PM
$this php

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:
我声明一个User类!它只含有一个属性 $name;
class User
{
public $_name;
}
现在,我给User类加个方法。就用getName()方法,输出$name属性的值吧! 复制PHP内容到剪贴板
PHP代码:
复制代码 代码如下:
class User
{
public $name;
function getName()
{
echo $this->name;
}
}
//如何使用呢?
$user1 = new User();
$user1->name = '张三';
$user1->getName(); //这里就会输出张三!
$user2 = new User();
$user2->name = '李四';
$user2->getName(); //这里会输出李四!

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;
大概就是这么个意思!

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