Problem with the database (MD5 HASH)...please help...

[jacks0_0]

I'm trying to integrate my system with vbulletin. In my file "signup.php" I had put this code:
$pass=md5(md5($_POST['password'].$salt));
$confirm=md5(md5($_POST['confirmpass'].$salt));
and then
$insertuser=mysql_query("insert into ".$tbfix."user (userid,fullname,username,password,email, permission,sex) values ('','$fullname','$username','$pass','$email','1',' $sex')") or die(mysql_error());
?>

And this is my code in my _function.php: (for login):
$sql=mysql_query("select permission,password,salt from ".$tbfix."user where userid='$cookieid'") or die(mysql_error());
$row=mysql_fetch_array($sql);
$salt=$row[salt];
$password=MD5(MD5($row[password].$salt));

it's working well when I register new member at my system (Vbulletin can read password and my system too) but when I register new member at vbulletin, only the vbb can read the password.

I have tried to figure out, and then I reg another member at my system, the password in the database is the same with the previous user and $salt has no effect :|

Please help me to solve this problem :) and tell me the easiest way to integrate a system with vbb ^ ^ thank you so much :)

[Adrian Schneider]

I'm pretty sure it is md5(md5(password) . salt)...

[jacks0_0]

I have edited it into:
$pass=md5(md5($_POST['password']).$salt);
$confirm=md5(md5($_POST['confirmpass']).$salt);
and
$sql=mysql_query("select permission,password,salt from ".$tbfix."user where userid='$cookieid'") or die(mysql_error());
$row=mysql_fetch_array($sql);
$salt=$row[salt];
$password=MD5(MD5($row[password].$salt)); [/QUOTE]
but it still doesn't work, I think the problem must be $salt varibale because Id didn't declare anything...
Can you provide me the code or show me the way to do it ^ ^ thank you so much :)

I think the problem would be the $salt variable... but I don't know how to declare it and combine it into my system's password...

I have converted my system's password into double md5 (I guess) and the vbulletin can read it without $salt...

Please tell me how to combine $salt and password :D thank you so much :)