How to resolve call to undefined curl_init()? - php

Question

There is a fatal error when I use curl from Laravel but a curl that exists in another file is working.
Why do these errors occur?
fatal error: call to undefined function App\Http\Controllers\curl_init()
App\Http\Controller\FcmController:
class FcmController extends Controller
{
public function index()
{
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL, 'https://fcm.googleapis.com/fcm/send');
curl_setopt($ch,CURLOPT_POST, true);
curl_setopt($ch,CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch,CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch,CURLOPT_POSTFIELDS, json_encode($fields));
$result = curl_exec($ch);
dd($result);
curl_close($ch);
App\Http\Controller\CurlContoller (It works):
class CurlController extends Controller
{
public static function getCurl($url, $params)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url . $params);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_HEADER, TRUE);;
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-type:application/json; charset=utf-8"));
$response = curl_exec($ch);
curl_close($ch);
return json_encode($response);
}

Answer 1

Does it work if you prefix the function to a top level namespace \curl_init. For the statically called function inside CurlController it won't be needed.
Also, not specifically answering your question but if you are running Laravel 7 and above you could actually use the built in http-client implementation from Laravel. It is more expressive than curl.