Piwik\API\Request::getRawSegmentFromRequest PHP Method

    public static function getRawSegmentFromRequest()
    {
        // we need the URL encoded segment parameter, we fetch it from _SERVER['QUERY_STRING'] instead of default URL decoded _GET
        $segmentRaw = false;
        $segment = Common::getRequestVar('segment', '', 'string');
        if (!empty($segment)) {
            $request = Request::getRequestParametersGET();
            if (!empty($request['segment'])) {
                $segmentRaw = $request['segment'];
            }
        }
        return $segmentRaw;
    }

 /**
  * @return array  URL to call the API, eg. "method=Referrers.getKeywords&period=day&date=yesterday"...
  */
 public function getRequestArray()
 {
     // we prepare the array to give to the API Request
     // we setup the method and format variable
     // - we request the method to call to get this specific DataTable
     // - the format = original specifies that we want to get the original DataTable structure itself, not rendered
     $requestArray = array('method' => $this->requestConfig->apiMethodToRequestDataTable, 'format' => 'original');
     $toSetEventually = array('filter_limit', 'keep_summary_row', 'filter_sort_column', 'filter_sort_order', 'filter_excludelowpop', 'filter_excludelowpop_value', 'filter_column', 'filter_pattern', 'flat', 'expanded', 'pivotBy', 'pivotByColumn', 'pivotByColumnLimit');
     foreach ($toSetEventually as $varToSet) {
         $value = $this->getDefaultOrCurrent($varToSet);
         if (false !== $value) {
             $requestArray[$varToSet] = $value;
         }
     }
     $segment = ApiRequest::getRawSegmentFromRequest();
     if (!empty($segment)) {
         $requestArray['segment'] = $segment;
     }
     if (ApiRequest::shouldLoadExpanded()) {
         $requestArray['expanded'] = 1;
     }
     $requestArray = array_merge($requestArray, $this->requestConfig->request_parameters_to_modify);
     if (!empty($requestArray['filter_limit']) && $requestArray['filter_limit'] === 0) {
         unset($requestArray['filter_limit']);
     }
     if ($this->requestConfig->disable_generic_filters) {
         $requestArray['disable_generic_filters'] = '1';
     }
     if ($this->requestConfig->disable_queued_filters) {
         $requestArray['disable_queued_filters'] = 1;
     }
     return $requestArray;
 }