templating this login script

Wales

header.html is empty Why am I getting these errors:

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\wamp\www\templates\header.html:16) in C:\wamp\www\index.php on line 16

16-- session_start();

Warning: Cannot modify header information - headers already sent by (output started at C:\wamp\www\templates\header.html:16) in C:\wamp\www\index.php on line 20

20-- header('location: member.php');

Warning: Unknown: Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively. in Unknown on line 0

index.html

<table>
	<tr>
    	<td>
        	<table>
            	<tr>
                	<td>
                    <form method="post" action="index.php">

<label>Username</label><br/><input name="username"/><br/>

<label>Password</label><br/><input name="password" type="password"/><br/>

<input type="submit" name="login" value="login"/>

</form>
                    </td>
                </tr>
            </table>
        </td>
        <td>
        	<table>
            	<tr>
                	<td>

                </td>
            </tr>
        </table>
    </td>
</tr>
</table>

index.php

<?php
require ("connect/connect.php");
require ('templates/header.html');

if(!$_POST['login']){


$check = mysql_query("SELECT * FROM members WHERE username='".addslashes($_POST['username'])."'") or die("The username you entered was incorrect.");

$check_result = mysql_fetch_array($check);



if(sha1($_POST['password'] == $check_result['password'])) {

session_start();

$_SESSION['username'] = $_POST['username'];

header('location: member.php');

}else{

print'Your login details did not match the ones in our database. Please try again.';

}

}


require ('templates/index.html');
require ('templates/footer.html');
?>

roscor

try putting session_start(); at the very top of index.php like so

<?php session_start();

//rest of code

Wales

Now I only get the following:

Warning: Cannot modify header information - headers already sent by (output started at C:\wamp\www\templates\header.html:16) in C:\wamp\www\index.php on line 20

20-- header('location: member.php');

roscor

sorry read it wrong, nothing should be called before the session_start() look over your code!

the error

Warning: Cannot modify header information headers already sent by (output started at C:\wamp\www\templates\header.html:16) in C:\wamp\www\index.php on line 20

is telling you that you ouput in header.html

Wales

I can see my header section why is it giving that error still? I don't have anything going to header except the require()

roscor

the file is require ('templates/header.html'); therefore I presume you are outputting html before header('location: member.php');

what is in header.html?

EDIT: in simple terms move require ('templates/header.html'); to the bottom of your code just above

require ('templates/index.html');
require ('templates/footer.html');, this is unless header.html has some significance in your code?

Wales

It's the template for the header section. When I move it to the bottom
require ('templates/header.html');
require ('templates/index.html');
require ('templates/footer.html');

it automatically logs in and logs out and when I click my link to login it automatically logs in without in inputs.