cafe24 sms 호스팅의 sms 발송 관련 예제를 참조하여 해당 함수를 만들어보았다.
아래의 함수를 활용하여 운영중인 서비스에 좀더 편리하게 적용하리라 본다.

<?
function cafe24_send_msg($rnum, $send_num, $send_msg){
    $imsi = explode('-',$rnum);
 
    $sms_url        = "cafe24 sms호스팅 발송주소";
    $sms['user_id'] = base64_encode("아이디");
    $sms['secure']  = base64_encode("인증키") ;
    $sms['msg']     = base64_encode(stripslashes($send_msg));
 
    $sms['rphone']  = base64_encode($send_num);
    $sms['sphone1'] = base64_encode($imsi[0]);
    $sms['sphone2'] = base64_encode($imsi[1]);
    $sms['sphone3'] = base64_encode($imsi[2]);
 
    $sms['mode']    = base64_encode("1");
 
    $sms['smsType'] = base64_encode('S');
 
    $host_info = explode("/", $sms_url);
    $host = $host_info[2];
    $path = $host_info[3]."/".$host_info[4];
 
    srand((double)microtime()*1000000);
    $boundary = "---------------------".substr(md5(rand(0,32000)),0,10);
 
    $header  = "POST /".$path ." HTTP/1.0\r\n";
    $header .= "Host: ".$host."\r\n";
    $header .= "Content-type: multipart/form-data, boundary=".$boundary."\r\n";
 
    foreach($sms AS $index => $value){
        $data .="--$boundary\r\n";
        $data .= "Content-Disposition: form-data; name=\"".$index."\"\r\n";
        $data .= "\r\n".$value."\r\n";
        $data .="--$boundary\r\n";
    }
    $header .= "Content-length: " . strlen($data) . "\r\n\r\n";
 
    $fp = fsockopen($host, 80);
 
    if ($fp) { 
        fputs($fp, $header.$data);
        $rsp = '';
        while(!feof($fp)) { 
            $rsp .= fgets($fp,8192); 
        }
        fclose($fp);
        $msg    = explode("\r\n\r\n",trim($rsp));
        $rMsg   = explode(",", $msg[1]);
        $Result = $rMsg[0]; //발송결과
        $Count  = $rMsg[1]; //잔여건수
    }
 
    return $Result;
}
?>