_checkCode example

if(!$this->SetServer($server)) return false;
        }
        if($this->_ready) return true;
        $this->SendMsg('Local OS : '.$this->OS_FullName[$this->OS_local]);
        if(!($this->_ftp_control_sock = $this->_connect($this->_host, $this->_port))) {
            $this->SendMSG("Error : Cannot connect to remote host \"".$this->_fullhost." :".$this->_port."\"");
            return FALSE;
        }
        $this->SendMSG("Connected to remote host \"".$this->_fullhost.":".$this->_port."\". Waiting for greeting.");
        do {
            if(!$this->_readmsg()) return FALSE;
            if(!$this->_checkCode()) return FALSE;
            $this->_lastaction=time();
        } while($this->_code<200);
        $this->_ready=true;
        $syst=$this->systype();
        if(!$syst) $this->SendMSG("Cannot detect remote OS");
        else {
            if(preg_match("/win|dos|novell/i", $syst[0])) $this->OS_remote=FTP_OS_Windows;
            elseif(preg_match("/os/i", $syst[0])) $this->OS_remote=FTP_OS_Mac;
            elseif(preg_match("/(li|u)nix/i", $syst[0])) $this->OS_remote=FTP_OS_Unix;
            else $this->OS_remote=FTP_OS_Mac;
            $this->SendMSG("Remote OS: ".$this->OS_FullName[$this->OS_remote]);
        }

if(!$this->_readmsg($fnction)) return FALSE;
        return TRUE;
    }

    function _data_prepare($mode=FTP_ASCII) {
        if(!$this->_settype($mode)) return FALSE;
        if($this->_passive) {
            if(!$this->_exec("PASV", "pasv")) {
                $this->_data_close();
                return FALSE;
            }
            if(!$this->_checkCode()) {
                $this->_data_close();
                return FALSE;
            }
            $ip_port = explode(",", preg_replace("/^.+ \\(?([0-9]{1,3},[0-9]{1,3},[0-9]{1,3},[0-9]{1,3},[0-9]+,[0-9]+)\\)?.*$/s", "\\1", $this->_message));
            $this->_datahost=$ip_port[0].".".$ip_port[1].".".$ip_port[2].".".$ip_port[3];
            $this->_dataport=(((int)$ip_port[4])<<8) + ((int)$ip_port[5]);
            $this->SendMSG("Connecting to ".$this->_datahost.":".$this->_dataport);
            $this->_ftp_data_sock=@fsockopen($this->_datahost, $this->_dataport, $errno, $errstr, $this->_timeout);
            if(!$this->_ftp_data_sock) {
                $this->PushError("_data_prepare","fsockopen fails", $errstr." (".$errno.")");
                $this->_data_close();
                

return FALSE;
        }
        if(!$this->_settimeout($this->_ftp_data_sock)) {
            $this->_data_close();
            return FALSE;
        }
        if($this->_passive) {
            if(!$this->_exec("PASV", "pasv")) {
                $this->_data_close();
                return FALSE;
            }
            if(!$this->_checkCode()) {
                $this->_data_close();
                return FALSE;
            }
            $ip_port = explode(",", preg_replace("/^.+ \\(?([0-9]{1,3},[0-9]{1,3},[0-9]{1,3},[0-9]{1,3},[0-9]+,[0-9]+)\\)?.*$/s", "\\1", $this->_message));
            $this->_datahost=$ip_port[0].".".$ip_port[1].".".$ip_port[2].".".$ip_port[3];
            $this->_dataport=(((int)$ip_port[4])<<8) + ((int)$ip_port[5]);
            $this->SendMSG("Connecting to ".$this->_datahost.":".$this->_dataport);
            if(!@socket_connect($this->_ftp_data_sock, $this->_datahost, $this->_dataport)) {
                $this->PushError("_data_prepare","socket_connect", socket_strerror(socket_last_error($this->_ftp_data_sock)));
                $this->_data_close();
                return FALSE;
            }