Error sending array through POST

[StApostol]

Hello
There was a problem with the method of POST, when I send an array of error takes off.
Helps formatting data to be sent via function http_build_query

public function post($url, $data, $params = array(), $debug = false)
{
        $url = $this->buildUrl($url, $params);
        $options = $this->getOptions();
        $options[CURLOPT_POST] = true;
        $options[CURLOPT_POSTFIELDS] = is_array($data) ? http_build_query($data) : $data;
        return $this->exec($url, $options, $debug);
}