Auth_OpenID_SQLStore::_add_nonce PHP Method

    function _add_nonce($server_url, $timestamp, $salt)
    {
        $sql = $this->sql['add_nonce'];
        $result = $this->connection->query($sql, array($server_url, $timestamp, $salt));
        if ($this->isError($result)) {
            $this->connection->rollback();
        } else {
            $this->connection->commit();
        }
        return $this->resultToBool($result);
    }

 /**
  * @access private
  */
 function _add_nonce($server_url, $timestamp, $salt)
 {
     // PECL SQLite extensions 1.0.3 and older (1.0.3 is the
     // current release at the time of this writing) have a broken
     // sqlite_escape_string function that breaks when passed the
     // empty string. Prefixing all strings with one character
     // keeps them unique and avoids this bug. The nonce table is
     // write-only, so we don't have to worry about updating other
     // functions with this same bad hack.
     return parent::_add_nonce('x' . $server_url, $timestamp, $salt);
 }