How can i convert a yml,json or xml to csv - symfony

Question

I'm using the bundle "JMSSerializerBundle" for export retrieved entity data. I can export the results as json, xml or yml successfully.
But i need also a csv export for this results. This bundle can't handle csv export. But i'm also not sure how can i convert json,xml or yml to csv, because csv is a flat file.
Have anyone solve this issue before?
Update
Now i create an solution for my problem, i'm partially satisfied with my solution, because it is not recursive. I will show it.
if ($format == 'csv') {
$json = $serializer->serialize($query, 'json', SerializationContext::create()->enableMaxDepthChecks());
return $this->toCsv(json_decode($json, true));
}
/**
* #todo write an recursive function for deeper levels
*
* #param $data
* #return array
*/
protected function toCsv($data)
{
$headers = array();
$outerCounter = 0;
foreach ($data as $key => $value) {
foreach ($value as $i => $j) {
if (!is_array($j)) {
$headers[] = $i;
$result[$outerCounter][$i] = $j;
} else {
foreach ($j as $k => $m) {
if (!is_array($m)) {
$headers[] = $i. '_'.$k;
$result[$outerCounter][$i. '_'.$k] = $m;
} else {
foreach ($m as $n => $l) {
if (!is_array($l)) {
$headers[] = $i.'_'.$k.'_'.$n;
$result[$outerCounter][$i.'_'.$k.'_'.$n] = $l;
}
}
}
}
}
}
$outerCounter++;
}
asort($headers);
$headers = array_unique($headers);
return array('headers' => $headers, 'data' => $result);
}