Jump to content


This topic is now archived and is closed to further replies.


keep getting error message at login!

Recommended Posts

ok every time i try to login to my site to test it i get the same error message database.

Warning: mysql_query(): supplied argument is not a valid MySQL-Link resource in /home/pokebash/public_html/login.php on line 11
That username doesn't exist in our database.

thats where the page is

the code for the page is here.


function confirmUser($username, $password){
   global $conn;
   /* Add slashes if necessary (for query) */
   if(!get_magic_quotes_gpc()) {
$username = addslashes($username);

   $q = "select password from users where username = '$username'";
   $result = mysql_query($q,$conn);
   if(!$result || (mysql_numrows($result) < 1)){
      return 1; //Indicates username failure

   $dbarray = mysql_fetch_array($result);
   $dbarray['password']  = stripslashes($dbarray['password']);
   $password = stripslashes($password);

   if($password == $dbarray['password']){
      return 0; //Success! Username and password confirmed
      return 2; //Indicates password failure

function checkLogin(){
   /* Check if user has been remembered */
   if(isset($_COOKIE['cookname']) && isset($_COOKIE['cookpass'])){
      $_SESSION['username'] = $_COOKIE['cookname'];
      $_SESSION['password'] = $_COOKIE['cookpass'];

   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 */
         return false;
      return true;
      return false;

function displayLogin(){
   global $logged_in;
      echo "<h1>Logged In!</h1>";
      echo "Welcome <b>$_SESSION[username]</b>, you are logged in. <a href=\"logout.php\">Logout</a>";
<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>


   /* Check that all fields were typed in */
   if(!$_POST['user'] || !$_POST['pass']){
      die('You didn\'t fill in a required field.');

   $_POST['user'] = trim($_POST['user']);
   if(strlen($_POST['user']) > 30){
      die("Sorry, the username is longer than 30 characters, please shorten it.");

   $md5pass = md5($_POST['pass']);
   $result = confirmUser($_POST['user'], $md5pass);

   if($result == 1){
      die('That username doesn\'t exist in our database.');
   else if($result == 2){
      die('Incorrect password, please try again.');

   $_POST['user'] = stripslashes($_POST['user']);
   $_SESSION['username'] = $_POST['user'];
   $_SESSION['password'] = $md5pass;

      setcookie("cookname", $_SESSION['username'], time()+60*60*24*100, "/");
      setcookie("cookpass", $_SESSION['password'], time()+60*60*24*100, "/");

   echo "<meta http-equiv=\"Refresh\" content=\"0;url=$HTTP_SERVER_VARS[PHP_SELF]\">";

$logged_in = checkLogin();

pleeze help!!! :)

Share this post

Link to post
Share on other sites
it doesn't look like you are setting $username anywhere. I see user is your form variable, but can't see where you set $_POST['user'] to $username.

Share this post

Link to post
Share on other sites
the error has to do with your sql connection. If you are making your connection in a config file or somewhere else there is no need for the $conn in the query. PHP will use the last connection made unless specified

[code]$result = mysql_query($q);[/code]

That is also why you get the "That username doesn't exist in our database." because the connection failed.


Share this post

Link to post
Share on other sites
ok now im getting another error
message this isn't working
i need a tutorial

someone pleeze help

Share this post

Link to post
Share on other sites


Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.