yii\authclient\OAuth1::composeSignatureBaseString PHP Метод

    protected function composeSignatureBaseString($method, $url, array $params)
    {
        unset($params['oauth_signature']);
        uksort($params, 'strcmp');
        // Parameters are sorted by name, using lexicographical byte value ordering. Ref: Spec: 9.1.1
        $parts = [strtoupper($method), $url, http_build_query($params, '', '&', PHP_QUERY_RFC3986)];
        $parts = array_map('rawurlencode', $parts);
        return implode('&', $parts);
    }