/*
$json = file_get_contents('https://feiertage-api.de/api/?jahr=2019');
$obj = json_decode($json);
echo $obj->access_token;
*/

$url = "https://feiertage-api.de/api/?jahr=2019";

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true );
// This is what solved the issue (Accepting gzip encoding)
//curl_setopt($ch, CURLOPT_ENCODING, "gzip,deflate");
$response = curl_exec($ch);
curl_close($ch);
echo $response;