PHP - Moved: Help With Session Needed

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I am trying to create an index page which contains registration and login field
the problem that i get is on successful login a warning is displayed
session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\xampp\htdocs\Eventz.com\index.php:116) in C:\xampp\htdocs\Eventz.com\index.php on line 235

This is the login part of my index.php
this tag is inside an html table below the login form
I also have a registration form and its php code above the login form


Code: [Select]
<?php
if (isset($_REQUEST['pass']))
{
    $id=$_POST['id'];
    $pass=$_POST['pass'];

    $conn =mysql_connect("localhost","root","");
    if (!$conn)
    {
   die('Could not connect: ' . mysql_error());
    }
/*
checking connection....success!
*/
    $e=mysql_select_db('test', $conn);
    if(!$e)
    {
   die(''.mysql_error());
    }
    else
    {
   echo 'database selected successfully';
    }

    if (isset($_REQUEST['id'])  || (isset($_REQUEST['pass'])))
    {
        if($_REQUEST['id'] == "" || $_REQUEST['pass']=="")
        {
       echo "login fields cannot be empty";
        }
        else
        {
            $sql=mysql_query("Select email,password from login where email='$id' AND password='$pass'");
            $count=mysql_num_rows($sql);
            if($count==1) 

    /* $count checks if username and password are in same row */
            {   
                session_start();
                $_SESSION['id']=$id;
                echo "</br>Login Successful</br>";
            }
            else
            {
           echo "</br>invalid</br>";
           echo "please try to login again</br>";

            }
        
        }   
    }
}
?>


Any help or suggestion would be appreciated

I am having trouble resolving an error.

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/s519970/public_html/header.php:27) in /home/s519970/public_html/admin/login.php on line 2

 What I can gather is I can't use "header (Location: 'admin.php')" after i've used session_start(). I have tried to replace the header (Location: 'admin.php') with this:

                echo "<script>document.location.href='admin.php'</script>";
      echo "<script>'Content-type: application/octet-stream'</script>";

I've been trying to read up on solutions but haven't been able to get it sorted. If anyone can offer some advice that would be greatly appreciated as im new to php.

Code: [Select]
<?php
  session_start();
  if(isset($_SESSION['user']))

                echo "<script>document.location.href='admin.php'</script>";
echo "<script>'Content-type: application/octet-stream'</script>";
?>

<div id="loginform">

<form action="dologin.php" method="post">
<table>
<tr>
<td><span>Username:</span></td>
<td><input type="text" name="username" /></td>
</tr>
<tr>
<td><span>Password:</span></td>
<td><input type="password" name="password" /></td>
</tr>
<tr>
<td colspan="2" align="right"><input type="submit" name="login" value="Login" /></td>
</tr>
</table>
</form>

</div>
I have tried using require_once('yourpage.php'); before my <head></head> tags in the header document where I've specified the html information but this doesn't seem to work. I've been advised to use ob_start("ob_gzhandler"); but I am not sure how to implement this.

Any advice is greatly appreciated!

in this page
 http://maximaart.com/newscp/
i have this problem
Code: [Select]
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/maximasy/public_html/newscp/index.php:1) in /home/maximasy/public_html/newscp/index.php on line 2

my source code is

<?php
session_start();
include_once("config.php"); 
include_once("functions.php");
$errorMessage = '';
if (isset($_POST['txtUserId']) && isset($_POST['txtPassword'])) {
if ($_POST['txtUserId'] === "$user" && $_POST['txtPassword'] === "$pass") {
// the user id and password match,
$_SESSION['basic_is_logged_in'] = true;
require("main.php");
exit;?>