function signature ( $request, $base_string, $consumer_secret, $token_secret )
	{
		return $request->urlencode($request->urlencode($consumer_secret).'&'.$request->urlencode($token_secret));
	}
function signature ( $request, $base_string, $consumer_secret, $token_secret )
	{
		return $request->urlencode($request->urlencode($consumer_secret).'&'.$request->urlencode($token_secret));
	}
function signature ( $ request , $ base_string , $ consumer_secret , $ token_secret ) { return $ request -> urlencode ( $ request -> urlencode ( $ consumer_secret ) . '&' . $ request -> urlencode ( $ token_secret ) ) ; }
Calculate the signature using PLAINTEXT

@param OAuthRequest request
@param string base_string
@param string consumer_secret
@param string token_secret
@return string
Calculate the signature using PLAINTEXT