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<?php
session_start();
if(!isset($_POST['txtname'])&&!isset($_POST['txtpwd']))
{
echo 'err 01';
exit;
}
else
{
$txtname=$_POST['txtname'];
$txtpwd=$_POST['txtpwd'];
$dbhost="localhost";//主机
$dbuser="root";//用户名
$dbpassword="";
$dbdatabase="tw86_cms";
$con=@ mysql_connect("$dbhost","$dbuser","$dbpassword");
if (!$con)
{
echo 'Cannot connect to database.';
exit;
}
$select=@mysql_select_db($dbdatabase,$con);
if (!$select)
{
echo 'Cannot select database.';
exit;
}
$SQL="SELECT USERID FROM tw86_uadmin WHERE USERNAME ='$txtname' AND PASSWOED ='$txtpwd '" ;
$result=mysql_query("$SQL");
if(!$result)
{
echo 'Connot run query';
exit;
}
$total=mysql_num_rows($result);
$row=mysql_fetch_row($result);
if($total<>0)
{
$_SESSION['user']=$txtname;
echo("");
}
else
{
echo("");
}
}
?>
帮忙看一下,是一个身份检查页面,很简单的,但是不知道那边出错,无法跳转,我检查出是session问题,但是不知道怎么改

