And if you have some special intent, you can use ob_start(). Best regards, Yang Shiqi -----邮件原件----- 发件人: yangshiqi [mailto:yangshiqi@xxxxxxxx] 发送时间: 2004年12月18日 19:36 收件人: 'Ahmed Abdel-Aliem'; 'php-general@xxxxxxxxxxxxx' 主题: 答复: header information problem I don't understand why you want to include header.html before you redirect the users to the login_success.php? By the way, you 'd better to add mysql_escape_string() with the username and password to ensure the security of your code. Coz we can't believe any users' input from web. May be the sql injection with your site. Just be careful. Best regards, Yang Shiqi -----邮件原件----- 发件人: Ahmed Abdel-Aliem [mailto:me2resh@xxxxxxxxx] 发送时间: 2004年12月18日 18:52 收件人: php-general@xxxxxxxxxxxxx 主题: header information problem Dear Groups members. i am making a user protected page, the script works excellent on my local server, but online it gives me this error : Warning: Cannot modify header information - headers already sent by (output started at /home/me2resh/public_html/apex/upload/header.html:10) in /home/me2resh/public_html/apex/upload/upload.php on line 33 the script of the page is <? if (!isset($ID)){ include 'header.html'; echo "No ID is Set.<br>You Got To This Page By Mistake"; include 'footer.html'; }else{ session_start(); include 'db.php'; include 'header.html'; $username = $_POST['username']; $password = $_POST['password']; if((!$username) || (!$password)){ echo "Please enter ALL of the information! <br />"; include 'login_form.html'; include 'footer.html'; exit(); } $sql = mysql_query("SELECT * FROM user WHERE User_Login='$username' AND User_Password='$password'"); $login_check = mysql_num_rows($sql); if($login_check > 0){ session_register('ID'); $_SESSION['ID'] = $ID; while($row = mysql_fetch_array($sql)){ foreach( $row AS $key => $val ){ $$key = stripslashes( $val ); } session_register('User_First_Name'); $_SESSION['User_First_Name'] = $User_First_Name; session_register('User_Last_Name'); $_SESSION['User_Last_Name'] = $User_Last_Name; session_register('User_ID'); $_SESSION['User_ID'] = $User_ID; header("Location: login_success.php"); } }else{ include 'header.html'; echo "You could not be logged in! Either the username and password do not match!<br /> Please try again!<br />"; include 'login_form.html'; include 'footer.html'; } } ?> Can anyone help me with that problem please ? -- Ahmed Abdel-Aliem www.ApexScript.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php