$file = curl_get("https://www.kinomania.ru/news".$_GET['$id']);
тут слэш не нужен случаем? curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($curl, CURLOPT_AUTOREFERER, 1);
curl_setopt($curl, CURLOPT_COOKIEFILE, dirname(__FILE__).'/cookie.txt');
curl_setopt($curl, CURLOPT_COOKIEJAR, dirname(__FILE__).'/cookie.txt');
curl_setopt($curl, CURLOPT_REFERER, $url);
curl_setopt($curl, CURLOPT_HTTPHEADER, ['X-Requested-With: XMLHttpRequest', 'Content-Type: application/x-www-form-urlencoded; charset=UTF-8']);
curl_setopt($curl, CURLOPT_ENCODING, 'utf-8');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-Requested-With: XMLHttpRequest']);