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关于cookie在代码中执行的顺序有关问题

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Release： 2016-06-13 12:38:56
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关于cookie在代码中执行的顺序问题？
setcookie("user","Dean",time()+100);
echo $_COOKIE['user'];
?>
为什么上面代码第一次执行的时候报user未定义错误，而第二次执行则能够取出user数据，什么情况，是不是cookie在程序中最后执行啊，但php语句块不是按从上到下顺序执行的吗？

php cookie 执行顺序
Related labels：
cookie nbsp php string user
source：php.cn
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