Untitled

public static function authenticate($email="", $password="") {
    $email = $database->escape_value($email);
    $password = $database->escape_value($password);

    $sql  = "SELECT * FROM users ";
    $sql .= "WHERE email = '{$email}' ";
    $sql .= "AND password = '{$password}' ";
    $sql .= "LIMIT 1";
    $result_array = self::find_by_sql($sql);
                return !empty($result_array) ? array_shift($result_array) : false;
        }

}