Here is my login code. I want the user to go directly to another page upon successfull login. I thought all I had to do is insert header info, but it keeps saying error due to header data cant be sent. What needs to go where for this to send the logged in user to another page?
<?
/**
Checks whether or not the given username is in the
database, if so it checks if the given password is
the same password in the database for that user.
If the user doesn't exist or if the passwords don't
match up, it returns an error code (1 or 2).
On success it returns 0.
/
function confirmUser($username, $password){
global $conn;
/ Add slashes if necessary (for query) */
if(!get_magic_quotes_gpc()) {
$username = addslashes($username);
}
/ Verify that user is in database /
$q = "select password from users where username = '$username'";
$result = mysql_query($q,$conn);
if(!$result || (mysql_numrows($result) < 1)){
return 1; //Indicates username failure
}
/ Retrieve password from result, strip slashes /
$dbarray = mysql_fetch_array($result);
$dbarray['password'] = stripslashes($dbarray['password']);
$password = stripslashes($password);
/ Validate that password is correct /
if($password == $dbarray['password']){
return 0; //Success! Username and password confirmed
}
else{
return 2; //Indicates password failure
}
}
/**
checkLogin - Checks if the user has already previously
logged in, and a session with the user has already been
established. Also checks to see if user has been remembered.
If so, the database is queried to make sure of the user's
authenticity. Returns true if the user has logged in.
/
function checkLogin(){
/ Check if user has been remembered /
if(isset($COOKIE['cookname']) && isset($COOKIE['cookpass'])){
$SESSION['username'] = $COOKIE['cookname'];
$SESSION['password'] = $COOKIE['cookpass'];
}
/ Username and password have been set /
if(isset($SESSION['username']) && isset($SESSION['password'])){
/ Confirm that username and password are valid /
if(confirmUser($SESSION['username'], $SESSION['password']) != 0){
/ Variables are incorrect, user not logged in /
unset($SESSION['username']);
unset($SESSION['password']);
return false;
}
return true;
}
/ User not logged in /
else{
return false;
}
}
/**
Determines whether or not to display the login
form or to show the user that he is logged in
based on if the session variables are set.
/
function displayLogin(){
global $logged_in;
if($logged_in){
echo "<h1>Logged In!</h1>";
echo "Welcome <b>$_SESSION[username]</b>, you are logged in. <a href=\"logout.php\">Logout</a>";
echo "<p><br>You are now allowed to go to: <a href=\"http://www.prodjsofatlanta.com\">www.google.com</a>";
}
else{
?>
<h1>Login</h1>
<form action="" method="post">
<table align="left" border="0" cellspacing="0" cellpadding="3">
<tr><td>Username:</td><td><input type="text" name="user" maxlength="30"></td></tr>
<tr><td>Password:</td><td><input type="password" name="pass" maxlength="30"></td></tr>
<tr><td colspan="2" align="left"><input type="checkbox" name="remember">
<font size="2">Remember me next time</td></tr>
<tr><td colspan="2" align="right"><input type="submit" name="sublogin" value="Login"></td></tr>
<tr><td colspan="2" align="left"><a href="register.php">Join</a></td></tr>
</table>
</form>
<?
}
}
/**
Checks to see if the user has submitted his
username and password through the login form,
if so, checks authenticity in database and
creates session.
/
if(isset($POST['sublogin'])){
/ Check that all fields were typed in /
if(!$POST['user'] || !$POST['pass']){
die('You didn\'t fill in a required field.');
}
/ Spruce up username, check length */
$POST['user'] = trim($POST['user']);
if(strlen($POST['user']) > 30){
die("Sorry, the username is longer than 30 characters, please shorten it.");
}
/ Checks that username is in database and password is correct /
$md5pass = md5($POST['pass']);
$result = confirmUser($POST['user'], $md5pass);
/ Check error codes /
if($result == 1){
die('That username doesn\'t exist in our database.');
}
else if($result == 2){
die('Incorrect password, please try again.');
}
/ Username and password correct, register session variables /
$POST['user'] = stripslashes($POST['user']);
$SESSION['username'] = $POST['user'];
$_SESSION['password'] = $md5pass;
/**
This is the cool part: the user has requested that we remember that
he's logged in, so we set two cookies. One to hold his username,
and one to hold his md5 encrypted password. We set them both to
expire in 100 days. Now, next time he comes to our site, we will
log him in automatically.
/
if(isset($POST['remember'])){
setcookie("cookname", $SESSION['username'], time()+606024100, "/");
setcookie("cookpass", $_SESSION['password'], time()+606024100, "/");
}
/ Quick self-redirect to avoid resending data on refresh /
echo "<meta http-equiv=\"Refresh\" content=\"0;url=$HTTP_SERVER_VARS[PHP_SELF]\">";
return;
}
/ Sets the value of the logged_in variable, which can be used in your code /
$logged_in = checkLogin();
?>
