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php-关于PHP cookies,网页无法结果

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2016-06-02 11:31:32973browse

php

最近我在学习PHPcookies碰到如下问题:
我写了两段简单的代码:
c.php

session_start();
$sid=SID;

$_session['user']='xu';
$_session['password']='123';
echo'登录 a>';
?>
d.php
session_start();
if($_SESSION['user']=='xu'&&$_SESSION['password']=='123')
echo "欢迎{$_SESSION['user']}回来";
else
echo "bye";
?>
我在浏览器中已经设置允许cookies,但是网页显示出来还是这个问题:
Notice: Undefined index: user in D:\Download\PHP\xmapp\htdocs\php12\d.php on line 3
bye
我很迷茫,希望高手能给点提示

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