Detailed explanation of $this usage in PHP

this is a pointer to the current object

<?php

class human{
	
	public $name="李四";
	
	public function eat(){
	
	  echo $this->name,&#39;在吃饭&#39;;
	}
	
	public function test(){
	
	  echo $name,&#39;在吃饭&#39;;
	}
	
}

$li=new human();
echo $li->name;//李四
$li->eat();//李四在吃饭。
/*
和java,c++相比
方法体内想访问调用者的属性,必须用$this
如果不加,则理解为方法内部的一个局部变量.
*/ 

$li->test();//Notice: Undefined variable: name in C:\wamp\www\php\this.php on line 14

/******
从生活中的角度来理解$this
女娲造人时, 造了一个"悔恨"的方法
{
    抓[自己]头发
    抽 [自己] 脸
}
世界上的人那么多, 
悔恨时,抓谁的头发?
抽谁的脸?
张三,李四? 王五? 都不能说明合理的情况
只能理解为"自己"
******/
?>

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