Microweber\Utils\Adapters\Http\Curl::buildPostString PHP Method

    private function buildPostString()
    {
        $is_new_curl = class_exists('CurlFile', false);
        if (function_exists('curl_init')) {
            $this->fields_string = null;
            foreach ($this->post_data as $key => $value) {
                if (is_string($key) and is_string($value)) {
                    $this->fields_string .= $key . '=' . $value . '&';
                } elseif (is_array($value)) {
                }
            }
            $this->fields_string = rtrim($this->fields_string, '&');
            return $this->fields_string;
        }
    }