Login error: session_start()

gamber · April 25th, 2006, 12:14 PM

Greetings,
I am getting the following error in my script, and through much research, I cannot find a solution.

Background:
- xp home
- apache2triad 1.5.4
- dreamweaver 8.0.1
- testing on local host with virtual host implemented and working
- some experience and technical savvy (maybe not;))

Trying to create an administrative login for my site using (primarily) a tutorial and information from Macromedia.

Here is the error I recieve:

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at D:\apache2triad\htdocs\marketinginsider.ca\admin\l ogin.php:4) in D:\apache2triad\htdocs\marketinginsider.ca\admin\l ogin.php on line 6

php code begins on line 1, nothing is prior.
Code is as follows:

Code:

<?php include ('/Connections/connMI_local.php');        // connect to database?>
<?php ini_set ('display_errors', 1);                    //display all errors?>

<?php                                                    // *** Validate request to login to this site.
if (!isset($_SESSION)) {
  session_start();
}

$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
  $_SESSION['PrevUrl'] = $_GET['accesscheck'];
}

if (isset($_POST['username'])) {
  $loginUsername=$_POST['username'];
  $password=$_POST['password'];
  $MM_fldUserAuthorization = "";
  $MM_redirectLoginSuccess = "/admin/index.php";
  $MM_redirectLoginFailed = "/admin/login.php";
  $MM_redirecttoReferrer = true;
  mysql_select_db($database_connMI, $connMI);

  $LoginRS__query=sprintf("SELECT user_username, user_password FROM user WHERE user_username='%s' AND user_password='%s'",
    get_magic_quotes_gpc() ? $loginUsername : addslashes($loginUsername), get_magic_quotes_gpc() ? $password : addslashes($password)); 

  $LoginRS = mysql_query($LoginRS__query, $connMI) or die(mysql_error());
  $loginFoundUser = mysql_num_rows($LoginRS);
  if ($loginFoundUser) {
     $loginStrGroup = "";

    //declare two session variables and assign them
    $_SESSION['MM_Username'] = $loginUsername;
    $_SESSION['MM_UserGroup'] = $loginStrGroup;          

    if (isset($_SESSION['PrevUrl']) && true) {
      $MM_redirectLoginSuccess = $_SESSION['PrevUrl'];    
    }
    header("Location: " . $MM_redirectLoginSuccess );
  }
  else {
    header("Location: ". $MM_redirectLoginFailed );
  }
}

?>

FYI include code is as follows (been suspecting error begins here):

Code:

<?php
# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
$hostname_connMI_local = "localhost";
$database_connMI_local = "marketinginsider";
$username_connMI_local = "root";
$password_connMI_local = "stock";
$connMI_local = mysql_pconnect($hostname_connMI_local, $username_connMI_local, $password_connMI_local) or trigger_error(mysql_error(),E_USER_ERROR); 
?>

Many thanks and I look forward to a resolution - it has been way too many hours trying to resolved and troubleshoot.

Mantis · April 25th, 2006, 05:59 PM

You says that Macromedia code .. roflmao nice >.> open the notepad *I love ya*
anyway: session_start(); must be on your 1st line of code.. you can't have
<?php include lets do 300 operations here ?> session_start();

so:
<?php include ('/Connections/connMI_local.php'); // connect to database?>
<?php ini_set ('display_errors', 1); //display all errors?>

<?php // *** Validate request to login to this site.
if (!isset($_SESSION)) {
session_start();
}
should be:
<?php
session_start();
include ('/Connections/connMI_local.php'); // connect to database
ini_set ('display_errors', 1); //display all errors
?>

gamber · April 27th, 2006, 10:25 AM

Thanks for the assistance.
In the end, I rewrote the entire code without using Dreamweaver's "helpers".
It all works great now!

My suggestion is - avoid dreamweaver's helpers. Use them as a starting point to learn, but your coding will be much cleaner on your own