getting userdata at page start.?

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September 18th, 2003, 09:31 PM

DDDooGGG

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Location: Melbourne, Australia

Posts: 97

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getting userdata at page start.?

Hi, im trying to get some user details from the database if they have a cookie set. I have the foollowing piece of code, but i dont understand what certain lines do or if it is a good way to get user info?
Heres what i have

PHP Code:


		
			
function check_user_session($cuser, $cpass){

global $db;



    $sql = "SELECT * FROM user_users WHERE username='$cuser' AND password='$cpass' AND activated='1'";

    if ( !($result = $db->sql_query($sql)) ) <-- WHAT DOES THIS DO?

    {

        message_die('Error doing DB query userdata row fetch', $sql);

    }



    $userdata = $db->sql_fetchrow($result); <-- WHAT DOES THIS DO?

return ($userdata);

}

How would i use such a function?

__________________
regards,

Fulton

September 19th, 2003, 07:06 AM

dhouston

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Join Date: May 2003

Location: Tennessee

Posts: 1,355

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The first line you've questioned runs the query stored in $sql and prints an error message if the query fails to execute. The second line executes only if the query is successfully executed (the die() function stops program execution), and it returns an array of database results your query retrieved.

You would use such a function by retrieving a username and password through a form and doing something like the following:

PHP Code:


		
			
 $userdata=check_user_session($username,$password);  

if(sizeof($userdata)==1){

    print "Valid user!";

}

else{

    print "Invalid user or multiple rows for this account.";

}

It's pretty basic stuff; if it seems a little gibberishy to you, I recommend that you pick up a book on PHP and start with the basics. Doing so will make your programming efforts much easier.

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