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POheaders already sent while starting session
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copied!<p>When running my php code the following errors appear:</p> <pre><code> Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/chatvik/public_html/control.php:2) in /home/chatvik/public_html/control.php on line 5 Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/chatvik/public_html/control.php:2) in /home/chatvik/public_html/control.php on line 5 </code></pre> <p>What's wrong and how to fix it? Here is the code, i have deleted the real db usernames and passwords for sequrity reasons, thanks for your help:</p> <pre><code><?php /*** begin our session ***/ session_start(); /*** check if the users is already logged in ***/ if(isset( $_SESSION['user_id'] )) { $message = 'Users is already logged in'; } /*** check that both the username, password have been submitted ***/ if(!isset( $_POST['username'], $_POST['password'])) { $message = 'Please enter a valid username and password'; } /*** check the username is the correct length ***/ elseif (strlen( $_POST['username']) > 20 || strlen($_POST['username']) < 4) { $message = 'Incorrect Length for Username'; } /*** check the password is the correct length ***/ elseif (strlen( $_POST['password']) > 6 || strlen($_POST['password']) < 4) { $message = 'Incorrect Length for Password'; } /*** check the username has only alpha numeric characters ***/ elseif (ctype_alnum($_POST['username']) != true) { /*** if there is no match ***/ $message = "Username must be alpha numeric"; } /*** check the password has only alpha numeric characters ***/ elseif (ctype_alnum($_POST['password']) != true) { /*** if there is no match ***/ $message = "Password must be alpha numeric"; } else { /*** if we are here the data is valid and we can insert it into database ***/ $phpro_username = filter_var($_POST['username'], FILTER_SANITIZE_STRING); $phpro_password = filter_var($_POST['password'], FILTER_SANITIZE_STRING); /*** connect to database ***/ /*** mysql hostname ***/ $mysql_hostname = 'localhost'; /*** mysql username ***/ $mysql_username = 'xxxxxxx_usr'; /*** mysql password ***/ $mysql_password = 'xxxxxxx'; /*** database name ***/ $mysql_dbname = 'xxxxxxx_usr'; try { $dbh = new PDO("mysql:host=$mysql_hostname;dbname=$mysql_dbname", $mysql_username, $mysql_password); /*** $message = a message saying we have connected ***/ /*** set the error mode to excptions ***/ $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); /*** prepare the select statement ***/ $stmt = $dbh->prepare("SELECT phpro_user_id, phpro_username, phpro_password FROM phpro_users WHERE phpro_username = :phpro_username AND phpro_password = :phpro_password"); /*** bind the parameters ***/ $stmt->bindParam(':phpro_username', $phpro_username, PDO::PARAM_STR); $stmt->bindParam(':phpro_password', $phpro_password, PDO::PARAM_STR, 40); /*** execute the prepared statement ***/ $stmt->execute(); /*** check for a result ***/ $user_id = $stmt->fetchColumn(); /*** if we have no result then fail boat ***/ if($user_id == false) { $message = 'Login Failed'; } /*** if we do have a result, all is well ***/ else { /*** set the session user_id variable ***/ $_SESSION['user_id'] = $phpro_username; /*** tell the user we are logged in ***/ header('Location:sucsess.htm'); } } catch(Exception $e) { /*** if we are here, something has gone wrong with the database ***/ $message = 'We are unable to process your request. Please try again later"'; } } ?> </code></pre> <p>Sorry for asking this. I'm directly BAD at php so i'm glad you are helping me Thanks for the help</p>

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