hi everyone- I'm having trouble with a login form that i'm trying to create, it's breaking at a specific spot and, being new to php, I'm unable to troubleshoot the problem because frankly, I just don't know what it means. Here are the errors I'm getting when I try to login:
Warning: session_register() [function.session-register]: Cannot send session cookie - headers already sent by (output started at *****.php:10) in ****.php on line 39
Warning: session_register() [function.session-register]: Cannot send session cache limiter - headers already sent (output started at ******.php:10) in **********.php on line 39
Warning: Cannot modify header information - headers already sent by (output started at ************.php:10) in *******.php on line 41
Line 41 of my php is: session_register('myusername');
Line 43 is: header('location:login_success.php');
Also, I've attached the entire 'checklogin.php code below so you can have alook and see where I'm going wrong:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Untitled Document</title>
</head>
<body>
<?php
ob_start();
$host="*******.com"; // Host name
$username="****"; // Mysql username
$password="******"; // Mysql password
$db_name="dbname"; // Database name
$tbl_name="users"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
// Define $myusername and $mypassword
$myusername=$_POST['myusername'];
$mypassword=$_POST['mypassword'];
// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);
$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);
// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row
if($count==1){
// Register $myusername, $mypassword and redirect to file "login_success.php"
session_register('myusername');
session_register('mypassword');
header('location:login_success.php');
}
else {
echo "Wrong Username or Password";
}
ob_end_flush();
?>
</body>
</html>
