[SOLVED] problem with php headers

[gli]

logincheck.php file which process the login.php login form

<?php
require_once("session.php"); ?>
<?php require_once("functions.php"); ?>
<?php require_once("databasec.php"); ?>

<?php
$username = $_POST['username'];
$password = $_POST['password'];
$hashedpassword = sha1($password);

$query = "SELECT *";
$query .= "FROM users ";
$query .= "WHERE username = '{$username}' ";
$query .= "AND hashedpassword = '{$hashedpassword}' ";
$query .= "LIMIT 1";
$result_set = mysql_query($query);
confirm_query($result_set);
if (mysql_num_rows($result_set) == 1) {
$found_user = mysql_fetch_array($result_set);

$_SESSION['user_id'] = $found_user['id'];
$_SESSION['username'] = $found_user['username'];

redirect_to("login.php");

} else {
$message = "Username/password incorrect. <br />
Please make sure your caps lock key is off and try again.";
echo $message;
}
?>

 

functions.php file

<?php	



function confirm_query($result_set) {
	if (!$result_set) {
		die("Database query failed: " . mysql_error());
	}
}

	function redirect_to( $location = NULL ) {
	if ($location != NULL) {
		header("Location: {$location}");
		exit;
	}
}
?>

 

 

When im trying to login it shows:

Warning: Cannot modify header information - headers already sent by (output started at /home/www/jimperija.atwebpages.com/functions.php:19) in /home/www/jimperija.atwebpages.com/functions.php on line 13

 

where is the problem?

[GingerRobot]

The problem is that you are sending white space to the browser. Anything that is outside of PHP tags will be sent to the browser as plain text. Try:

 

<?php
require_once("session.php");
require_once("functions.php");
require_once("databasec.php");


$username = $_POST['username'];
$password = $_POST['password'];
$hashedpassword = sha1($password);

$query = "SELECT *";
$query .= "FROM users ";
$query .= "WHERE username = '{$username}' ";
$query .= "AND hashedpassword = '{$hashedpassword}' ";
$query .= "LIMIT 1";
$result_set = mysql_query($query);
confirm_query($result_set);
if (mysql_num_rows($result_set) == 1) {
$found_user = mysql_fetch_array($result_set);

$_SESSION['user_id'] = $found_user['id'];
$_SESSION['username'] = $found_user['username'];

redirect_to("login.php");

} else {
$message = "Username/password incorrect. <br />
Please make sure your caps lock key is off and try again.";
echo $message;
}
?>

[gli]

and...

Warning: Cannot modify header information - headers already sent by (output started at /home/www/jimperija.atwebpages.com/functions.php:19) in /home/www/jimperija.atwebpages.com/functions.php on line 13

 

again...

 

[haku]

You have sent text (which may only be a space) to the browser before your redirect statement. Find out where that text is, and remove it.

[gli]

omg. thnx.  but i didnt understand you for all 100%, but i deleted all spaces and now its working