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        $ch = curl_init();

        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)');

        /* try to follow redirects */
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);

        curl_setopt($ch, CURLOPT_URL, 'https://www.sunlinetransfers.com/api/extras/get.json');
        curl_setopt($ch, CURLOPT_POST, $POST);
        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

        /* timeout after the specified number of seconds. assuming that this script runs on a server, 20 seconds should be plenty of time to verify a valid URL.  */
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);

        curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);

        $response = curl_exec($ch);

        curl_close ($ch);