Piwik\Plugins\Referrers\API::getLabelsFromTable PHP Method

    protected function getLabelsFromTable($table)
    {
        $request = $_GET;
        $request['serialize'] = 0;
        // Apply generic filters
        $response = new ResponseBuilder($format = 'original', $request);
        $table = $response->getResponse($table);
        // If period=lastX we only keep the first resultset as we want to return a plain list
        if ($table instanceof DataTable\Map) {
            $tables = $table->getDataTables();
            $table = current($tables);
        }
        // Keep the response simple, only include keywords
        $keywords = $table->getColumn('label');
        return $keywords;
    }