/// Login.php

<?
include('config.php');

if ( $_POST["username"] != "" && $_POST["password"] != "" && $_POST["world"] != "" ) {
login($_POST["username"],$_POST["password"],$_POST["world"]);
}
else
{
echo "Error: Not all feilds entered";
}

function login($username,$password,$world) {
$query = "SELECT * FROM ogw_users WHERE username='$username' and password='$password' and world='$world'";
$result = mysql_query($query);

while($row = mysql_fetch_assoc($result)) {
$username = $row["username"];
$email = $row["email"];
$world = $row["world"];
}
?>
<script>
document.cookie = "username=<? echo $username; ?>; password=<? echo $password; ?>;world=<? echo $world ?>;";
window.location.href = "user.php";
<script>
<?
}


//////////////////////////////////

THE ERoor I got is:


PHP Error Message

Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in /home/a4986921/public_html/login.php on line 16

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