為何這樣沒(méi)有結(jié)果
Jun 13, 2016 pm 01:13 PM
為什么這樣沒(méi)有結(jié)果？
- PHP code
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<?php class test{
public $count=0;
public function add(){
$count=$count+2;
return $count;
}
}
$a=new test();
echo $a->add();
?>
為什么這樣不行？我定義$count初始值為0，add（）方法加2，然后實(shí)例化test，調(diào)用add，輸出，提示錯(cuò)誤：Notice: Undefined variable: count in D:\wamp\www\test\index.php on line 11
------解決方案--------------------
使用類的屬性，必須是 $this->屬性名 的方式。而 $變量名 （局部變量）并未定義，因此才會(huì)報(bào) Undefined variable: count
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