if(!empty($_REQUEST['user'])){ $user=$_REQUEST['user']; echo "welcome $user !";}<form name='msgform' action ='<?= $_SERVER['PHP_SELF'] ?>' method='post'> <input type='hidden' name='user' value='<?=$user?>'>这段的那个$_REQUEST['user']和 $_SERVER['PHP_SELF']是什么意思?
暮色呼如
慕桂英546537
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