curl request via PHP to method 'api/integrations/chat/system' return "error: EOF"

[SpectreZ64]

Hello!

When I send request to method 'api/integrations/chat/system' with PHP curl, it's return {"error":"eof"}.
My PHP curl request code:
`
private function curl($method, $params = []) {
$url = $this->apiPath . $method;
$c = curl_init();
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($c, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($c, CURLOPT_URL, $url);
curl_setopt($c, CURLOPT_HTTPHEADER, [
'Content-Type: application/json',
'Authorization: Bearer ' . $this->credentials['key'],
]);
if (!empty($params)) curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($params));

$contents = curl_exec($c);
curl_close($c);

if ($contents) return $contents;
else return false;
}
...
public function systemMessage($message) {
return $this->curl('integrations/chat/system', ['body' => $message]);
}
`
Method 'integrations/clients' works correct.
Method 'api/integrations/chat/system' from terminal works correct too...

What could be the problem?

[SpectreZ64]

My problem was invalid CURLOPT_POST and CURLOPT_HTTPHEADER params. For POST request need to be set CURLOPT_POST parameter to 1 and CURLOPT_HTTPHEADER as 'Content-Type: application/json'.