// This replacement adds substring search of keywords within a nickname.
	// Default behaviour of keywords is search within nickname
	// Adding a * before a keyword indicates this is a word to check against the full nickname only
	//
	// Example keyword list:
	// administrator, *admin, moderator
	//
	// All nicknames CONTAINING "administrator" and "moderator" are being blocked. 
	// If nickname is exactly "admin" then it is being blocked too
	// A Nickname of "Badminton" isn't being blocked
	//
	// Keywords are not case sensitive
	//
	// Make a copy of /modules/esase/nickname_filter/classes/SasNicknameFilterDb.php and keep it somewhere in case
	// you want to revert these changes. Then replace old function with this one

	function checkNickName($sNickName)
        {
                $sNickName = strtolower($this -> escape($sNickName));
                $sQuery = "SELECT `nick_names` FROM `{$this ->sTablePrefix}_items`";
                $aResult = explode(",", $this -> getOne($sQuery));
                $bReturn = FALSE;

                foreach($aResult as $sFilterwordCheck)
                {
                        $sFilterwordCheck = strtolower(trim($sFilterwordCheck));
                        $iLenFilterword = strlen($sFilterwordCheck);
                        if ($iLenFilterword > 0)
                        {
                                if ($sFilterwordCheck[0] == "*")
                                {
                                        if ($sNickName == substr($sFilterwordCheck, 1, $iLenFilterword))
                                        {
                                                $bReturn = TRUE;
                                                break;
                                        }
                                } else {
                                        if (!(strpos($sNickName, $sFilterwordCheck) === FALSE))
                                        {
                                                $bReturn = TRUE;
                                                break;
                                        }
                                }
                        }
                }
                return $bReturn;
        }