PHP遠程附件上傳

 

今天對ShuipFCMS程式增加了遠程附件的功能。是利用FTP實現，下面貼出一個PHPCMS V9裡面的一個FTP處理類，大致講講怎麼實現遠程附件的實現。

FTP類原始碼：

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class Ftp {            //FTP 串連資源    private $link;    //FTP連線時間    public $link_time;    //錯誤碼    private $err_code = 0;    //傳送模式{文字模式:FTP_ASCII, 二進位模式:FTP_BINARY}    public $mode = FTP_BINARY;            /**     * 串連FTP伺服器     * @param string $host    　　 伺服器位址     * @param string $username　　　使用者名稱     * @param string $password　　　密碼     * @param integer $port　　　　   伺服器連接埠，預設值為21     * @param boolean $pasv        是否開啟被動模式     * @param boolean $ssl　　　　 　是否使用SSL串連     * @param integer $timeout     逾時時間　     */    public function connect($host, $username = '', $password = '', $port = '21', $pasv = false, $ssl = false, $timeout = 30) {        $start = time();        if ($ssl) {            if (!$this->link = @ftp_ssl_connect($host, $port, $timeout)) {                $this->err_code = 1;                return false;            }        } else {            if (!$this->link = @ftp_connect($host, $port, $timeout)) {                $this->err_code = 1;                return false;            }        }                if (@ftp_login($this->link, $username, $password)) {            if ($pasv)                ftp_pasv($this->link, true);            $this->link_time = time() - $start;            return true;        } else {            $this->err_code = 1;            return false;        }        register_shutdown_function(array(&$this, 'close'));    }            /**     * 建立檔案夾     * @param string $dirname 目錄名，     */    public function mkdir($dirname) {        if (!$this->link) {            $this->err_code = 2;            return false;        }        $dirname = $this->ck_dirname($dirname);        $nowdir = '/';        foreach ($dirname as $v) {            if ($v && !$this->chdir($nowdir . $v)) {                if ($nowdir)                    $this->chdir($nowdir);                @ftp_mkdir($this->link, $v);            }            if ($v)                $nowdir .= $v . '/';        }        return true;    }            /**     * 上傳檔案     * @param string $remote 遠程存放地址     * @param string $local 本地存放地址     */    public function put($remote, $local) {        if (!$this->link) {            $this->err_code = 2;            return false;        }        $dirname = pathinfo($remote, PATHINFO_DIRNAME);        if (!$this->chdir($dirname)) {            $this->mkdir($dirname);        }        if (@ftp_put($this->link, $remote, $local, $this->mode)) {            return true;        } else {            $this->err_code = 7;            return false;        }    }            /**     * 刪除檔案夾     * @param string $dirname  目錄位址     * @param boolean $enforce 強制移除     */    public function rmdir($dirname, $enforce = false) {        if (!$this->link) {            $this->err_code = 2;            return false;        }        $list = $this->nlist($dirname);        if ($list && $enforce) {            $this->chdir($dirname);            foreach ($list as $v) {                $this->f_delete($v);            }        } elseif ($list && !$enforce) {            $this->err_code = 3;            return false;        }        @ftp_rmdir($this->link, $dirname);        return true;    }            /**     * 刪除指定檔案     * @param string $filename 檔案名稱     */    public function f_delete($filename) {        if (!$this->link) {            $this->err_code = 2;            return false;        }        if (@ftp_delete($this->link, $filename)) {            return true;        } else {            $this->err_code = 4;            return false;        }    }            /**     * 返回給定目錄的檔案清單     * @param string $dirname  目錄位址     * @return array 檔案清單資料     */    public function nlist($dirname) {        if (!$this->link) {            $this->err_code = 2;            return false;        }        if ($list = @ftp_nlist($this->link, $dirname)) {            return $list;        } else {            $this->err_code = 5;            return false;        }    }            /**     * 在 FTP 伺服器上改變目前的目錄     * @param string $dirname 修改伺服器上目前的目錄     */    public function chdir($dirname) {        if (!$this->link) {            $this->err_code = 2;            return false;        }        if (@ftp_chdir($this->link, $dirname)) {            return true;        } else {            $this->err_code = 6;            return false;        }    }            /**     * 擷取錯誤資訊     */    public function get_error() {        if (!$this->err_code)            return false;        $err_msg = array(            '1' => 'Server can not connect',            '2' => 'Not connect to server',            '3' => 'Can not delete non-empty folder',            '4' => 'Can not delete file',            '5' => 'Can not get file list',            '6' => 'Can not change the current directory on the server',            '7' => 'Can not upload files'        );        return $err_msg[$this->err_code];    }            /**     * 檢測目錄名     * @param string $url 目錄     * @return 由 / 分開的返回數組     */    private function ck_dirname($url) {        $url = str_replace('', '/', $url);        $urls = explode('/', $url);        return $urls;    }            /**     * 關閉FTP串連     */    public function close() {        return @ftp_close($this->link);    }        }

 

先來說說遠程附件上傳的大致流程：

   使用者選擇檔案上傳提交到伺服器->伺服器接收到檔案->伺服器一些安全檢測完成通過FTP功能上傳到相應FTP伺服器。

我說的只是一個大概過程，不是很標準，明白個意思即可啦！~

這個類大致使用方法：

  首先通過　$ftps->connect($host,$username,$password,$post,$pasv,$ssl,$timeout);進行FTP伺服器串連。

  通過具體的函數進行FTP的操作。

   $ftps->mkdir() 建立目錄，可以建立多級目錄以“/abc/def/higk”的形式進行多級目錄的建立。

   $ftps->put()上傳檔案

   $ftps->rmdir()刪除目錄

   $ftps->f_delete()刪除檔案

   $ftps->nlist()列出指定目錄的檔案

   $ftps->chdir()變更當前檔案夾

   $ftps->get_error()擷取錯誤資訊