if(!isset($_SESSION['valid_user']))
{
echo "You are not authorized! ";
exit("cnat");
}
if(isset($_SESSION['valid_user']))
{
echo "your are logged in as :".$_SESSION['valid_user']."<br/>";
echo "<a href='system.php'>system state</a>";
}
else
{
echo"password or name error!please try again!";
}
system.php
---------------------------------------------
session_start();
if(!isset($_SESSION['valid_user']))
{
echo"You are not authorized!";
exit;
}
else
{
echo "hello".$_SESSION['valid_user'];
}
试试先
<?@ $db = mysql_connect("localhost:3306") or die("connect error!");
mysql_select_db("db_dvbip",$db)or die("cannot open db");
$query = "select * from user where name='$name' and passwd='$passwd'";
$result = mysql_query($query,$db);
if(!session_is_registered("valid_user"))
{echo "You are not authorized! ";
exit("cnat");}
if(session_is_registered("valid_user"))
{
echo "your are logged in as :$valid_user<br>";
echo "<a href='system.php'>system state</a>";
}
else
{ echo"password or name error!please try again!";
}