php curl이 갑자기 안될수도있나요?

function curl($url, $isPost = FALSE, $jsonData) {
 $ch = curl_init();
 
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
 curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
 curl_setopt($ch,CURLOPT_HTTPHEADER, array(
  'Content-Type: application/json'
 ));
 if ($isPost) {
  $post_data = json_encode($jsonData);
  
  //POST방식
  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
  curl_setopt($ch, CURLOPT_POST, true);
  //POST방식으로 넘길 데이터(JSON데이터)
  curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
  curl_setopt($ch, CURLOPT_TIMEOUT, 3);
  
 }
 
 $g = curl_exec($ch);
 curl_close($ch);
 return $g;
}