PHP Remote Attachment Upload

Today, the SHUIPFCMS program adds remote attachment capabilities. Is the use of FTP implementation, the following posted a phpcms V9 inside an FTP processing class, roughly speaking how to implement the remote attachment.

FTP Class source code:

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Class FTP {             //ftp connection resources      private $link;     //ftp connection time     public $link _time;     //error code     private $err _code = 0;     //Transfer Mode {text mode: FTP_ASCII, Binary mode: ftp_binary}     public $mode = FTP_BINARY;              /**      * Connecting an FTP server      * @param string $host     server address      * @param string $username user name      * @param string $password password      * @param integer $port    server port, the default value is      * @param boolean $PASV    & nbsp;    whether to open the passive mode      * @param boolean $ssl whether to use an SSL connection    &Nbsp; * @param integer $timeout      timeout      */     public function Connect ($host, $username = ', $password = ', $port = ', $PASV = False, $ssl = false, $timeout = {         $start = time ();          if ($SSL) {            if (! $this->link = @ftp _ssl_connect ($host, $port, $timeout)) {                  $this->err_code = 1;                 return false;             }         &NBSP} 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;        &NBSP} else {             $this->err_code = 1;             return false;         }         register_ Shutdown_function (Array (& $this, ' close '));    &NBSP}              /**       * Create a folder      * @param string $dirname directory name,     & nbsp;*/    public function mkdir ($dirname) {         if (! $this->link) {             $this->err_code = 2;             return false;        &NBSP}          $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. '/';         }       &Nbsp; return true;    &NBSP}              /**       * Upload file      * @param string $remote Remote Storage address     & nbsp;* @param string $local Local address      */    public function put ($ Remote, $local) {        if (! $this->link) {              $this->err_code = 2;             return false;        &NBSP}          $dirname = PathInfo ($remote, pathinfo_dirname);         if (! $this->chdir ($dirname)) {              $this->mkdir ($dirname);       &nbSP;&NBSP}         if (@ftp_put ($this->link, $remote, $local, $this-> mode)) {            return true;         &NBSP} else {            $ This->err_code = 7;             return false;         }                    /**      * Delete folder      * @ param string $dirname   directory address      * @param boolean $enforce Force delete     & nbsp;*/    public function RmDir ($dirname, $enforce = False) {         if (! $this->link) {             $this->err_code = 2;             return false;        &NBSP}          $list = $this- >nlist ($dirname);         if ($list && $enforce) {              $this->chdir ($dirname);             foreach ($list as $v) {                  $this->f_delete ($v);             }         &NBSP} elseif ($list &&! $enforce) {              $this->err_code = 3;             return false;        &NBSP}          @ftp_rmdir ($ This->link, $dirname);         return true;    &NBSP}              /**       * Delete the specified file      * @param string $filename filename       */    public function F_delete ($filename) {         if (! $this->link) {             $this-> Err_code = 2;             return false;        &NBSP}         if (@ftp_ Delete ($this->link, $filename)) {             return true;         &nbsp} else {             $this- >err_code = 4;             return false;         }                    /**      * Returns a list of files for a given directory       * @param string $dirname   directory address      * @return array file list data       */    public function Nlist ($dirname) {         if (! $this->link) {             $this->err_code = 2;             return false;        &NBSP}         if ($list = @ftp _nlist ($thIs->link, $dirname)) {            return $list;        &NBSP} else {              $this->err_code = 5;             return false;         }                    /**      * Changes the current directory on the FTP server       * @param string $dirname Modify the current directory      */    public function on the server ChDir ($dirname) {        if (! $this->link) {              $this->err_code = 2;             return false;        &NBSP}         if (@ftp_chdir ($this->link, $dirname)) {             return true;        &NBSP} else {              $this->err_code = 6;             return false;         }                    /**      * get error messages      */     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];    &NBSP}              /**       * Detection Directory name       * @param string $url directory      * @return by/separate return array    & nbsp; */    private function Ck_dirname ($url) {          $url = Str_replace (', '/', $url);          $urls = explode ('/', $url);         return $urls;    &NBSP}              /**       * closes the FTP connection      */    public function close () {         return @ftp_close ($this->link);    &NBSP}         }

First of all, remote attachment upload the approximate process:

User Select File upload submit to server-> server receive file-> server some security detection completed via FTP function upload to the corresponding FTP server.

I said just a general process, not very standard, understand a meaning can! ~

This class uses the method roughly:

First through the $ftps->connect ($host, $username, $password, $post, $PASV, $ssl, $timeout), FTP server connection.

The operation of FTP through specific functions.

$ftps->mkdir () to create a directory, you can create a multi-level directory to "/abc/def/higk" the form of multi-level directory creation.

$ftps->put () upload file

$ftps->rmdir () Delete directory

$ftps->f_delete () Delete files

$ftps->nlist () lists the files for the specified directory

$ftps->chdir () to change the current folder

$ftps->get_error () to get the error message