while($row = $result->fetch_assoc())
    {
        // Makes sure input from uid matches database entry
        if($user == $row['first'])
        {
            if($pass == $row['password'])
            {
                echo "Logged in";
                include "cookie.php";
            }
            else
            {
                echo "Failed login";
            }
        }
        else
        {
            echo "Failed login";
        }
    }