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php/mysql header and session_start errors

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  #1  
Old March 23rd, 2004, 07:12 PM
bokerfest bokerfest is offline
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php/mysql header and session_start errors
My code all makes perfect sense to to and all the testing for my auth_level is correct and works properly.

My problem when testing the code is that it comes out with error with my session_start(); line and my header("Location: auth2menu.php"); line.

Can Anyone help or tell me what these errors are trying to communicate?

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /home/oddprod/public_html/login3.php:9) in /home/oddprod/public_html/login3.php on line 11

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/oddprod/public_html/login3.php:9) in /home/oddprod/public_html/login3.php on line 11

Warning: Cannot modify header information - headers already sent by (output started at /home/oddprod/public_html/login3.php:9) in /home/oddprod/public_html/login3.php on line 47

PHP Code:
<?php
//start sessions
session_start();
// Connect to DB
$db = mysql_connect ("localhost", "username", "password")
 or die ('I cannot connect to the database because: ' . mysql_error());
$db_selected = mysql_select_db('oddprod_managment', $db);
if (!$db_selected) {
   die ('Can\'t use oddprod_managment : ' . mysql_error());
}
// End Connect

//extract user information from database

if ($username && $password)
{
 // if the user has just tried to log in
 $query = "select * from users "
 ."where usersLOGIN='$username' "
 ." and usersPASS='$password' ";
 $result = mysql_query($query);
 $row = mysql_fetch_assoc($result);
 
 if (mysql_num_rows($result) >0)
 {
  // if they are in the database register the user id
  $_SESSION['valid_user'] = $row['usersLOGIN'];
  $_SESSION['pass'] = $_POST['password'];
  $_SESSION['auth_level'] = $row["usersTITLEID"];
 }
}

if ($_SESSION['auth_level']==1){
 header("Location: auth2menu.php");
}

else if($_SESSION['auth_level']==2){
 header("Location: auth2menu.php");
}

mysql_close($db);

?>
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  #2  
Old March 24th, 2004, 06:56 AM
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dhouston dhouston is offline
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Usually, you'd expect to see this if there was extra space at the top of your file or if this file is included in something that sends some output. Is either of these the case?
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  #3  
Old March 24th, 2004, 07:14 AM
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Spongy Spongy is offline
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Can you share with us what's on line 9? You call the session at line 11, and there is some output generated on line 9. You can try to put the session_start() on top of your code, just as in your snippet.
Cheers,
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  #4  
Old March 24th, 2004, 10:38 AM
bokerfest bokerfest is offline
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Smile Solution
I got it figured out. I it is because I have html before the php code and the web server confuses the two and thinks I have already submitted header information.

Solution: Take out all previous html to session_start.
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  #5  
Old March 25th, 2004, 04:46 AM
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The server confuses nothing. The code is parsed at the moment you call it in your file. But this is exactly what I meant. I struggled with it a long time before I got to the solution. Glad I could help...

Cheers,
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  #6  
Old March 25th, 2004, 05:23 AM
ChrisIves ChrisIves is offline
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I've seen alot of people adding this line as well:

PHP Code:
 session_start();
header("Cache-control: private"); 


Seems to be some kind of IE6 fix. Thought it was worth mentioning.
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