Есть функция, как «заставить» эту функцию вывести строку в echo?

$group_id="1";
$access_token = "6cc1c8766cc1c8766cc1c876ce6ca5767b66cc16cc1c87637dfd76137ce61a879ce8648";

function vk_fans_count($group_id) {
        $curl = curl_init();
        curl_setopt_array($curl, [
            CURLOPT_URL => 'https://api.vk.com/method/groups.getMembers',
            CURLOPT_POST => true,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_SSL_VERIFYHOST => false,
            CURLOPT_SSL_VERIFYPEER => false,
            CURLOPT_POSTFIELDS => [
                'group_id' => $group_id,
                'access_token' => $access_token,
                'count' => 0,
                'v' => 5.73
            ]
        ]);
        $response = json_decode(curl_exec($curl))->response;
        curl_close($curl);
        return $response->count;
}