[...]
if(rename(TARGET_TEMP.$prev_filename, TARGET.'/'.$new_filename)){
        if(!ftp_upload_file(URL.'/',$new_filename."_".$phase.$rev.$ext))
        {
            echo "NOK";
        }
    }
[...]



// function
function ftp_upload_file($ftp_dir, $file){

    $ftp_server = "ftp_serv_ip";
    $ftp_username = "ftp_username";
    $ftp_password = "ftp_password";

    // set up basic connection
    $ftp_conn_id = ftp_connect($ftp_server);

    // login with username and password
    $login_result = ftp_login($ftp_conn_id, $ftp_username, $ftp_password);
    ftp_pasv($ftp_conn_id, false);


   if(!@ftp_chdir($ftp_conn_id, $ftp_dir)){
       $parts = explode('/',$ftp_dir);
       foreach($parts as $part){
          if(!@ftp_chdir($ftp_conn_id, $part)&&$part<>""){
          ftp_mkdir($ftp_conn_id, $part);
          ftp_chdir($ftp_conn_id, $part);
          }
       }
   }

    if(!ftp_put($ftp_conn_id,$ftp_dir.$file, '.'.$ftp_dir.$file, FTP_ASCII))
    {
        return false;
    }
    else{
        return true;
    }
    ftp_close($ftp_conn_id);

}