php使用ftp远程上传文件类(完美解决主从文件同步问题的方法)

php使用ftp实现文件上传代码片段：

 'ip', 
      'port' => 21, 
      'user' => 'userName', 
      'pwd' => 'password' 
    ); 

     
    public function openServer($flag = 'test'){ 
      //选择服务器 
      $config = $this->getServerConfig($flag); 

      //连接服务器 
      $connect = ftp_connect($config['host'], $config['port']); 
      if($connect == false) return 0; 

      //登录服务器 
      if(!ftp_login($connect, $config['user'], $config['pwd'])) return 1; 

      //打开被动模式，数据的传送由客户机启动，而不是由服务器开始 
      ftp_pasv($connect, true); 

      //返回连接标识 
      return $connect; 
    } 

     
    public function makeDir($connect, $dirPath){ 
      //处理目录 
      $dirPath = '/' . trim($dirPath, '/'); 
      $dirPath = explode('/', $dirPath); 
      foreach ($dirPath as $dir){ 
 if($dir == '') $dir = '/'; 
 //判断目录是否存在 
 if(@ftp_chdir($connect, $dir) == false){ 
   //判断目录是否创建成功 
   if(@ftp_mkDir($connect, $dir) == false){ 
     return 2; 
   } 
   @ftp_chdir($connect, $dir); 
 } 
      } 
      return true; 
    } 

     
    public function closeServer($connect){ 
      if(!empty($connect)) ftp_close($connect); 
    } 

     
    public function upload($flag = 'test', $local, $remote){ 
      //连接并登录服务器 
      $connect = $this->openServer($flag); 
      if(($connect === 0) || ($connect === 1)) return $connect; 

      //上传文件目录处理 
      $mdr = $this->makeDir($connect, dirname($remote)); 
      if($mdr === 2) return 2; 

      //上传文件 
      $result = ftp_put($connect, basename($remote), $local, FTP_BINARY); 

      //关闭服务器 
      $this->closeServer($connect); 

      //返回结果 
      return (!$result) ? 3 : 4; 
    } 

     
    public function delete($flag = 'test', $remote){ 
      //连接并登录服务器 
      $connect = $this->openServer($flag); 
      if(($connect === 0) || ($connect === 1)) return $connect; 

      //删除 
      $result = ftp_delete($connect, $remote); 

      //关闭服务器 
      $this->closeServer($connect); 

      //返回结果 
      return (!$result) ? 2 : 3; 
    } 

     
    public function read($flag, $remote){ 
      //连接并登录服务器 
      $connect = $this->openServer($flag); 
      if(($connect === 0) || ($connect === 1)) return $connect; 

      //读取 
      $result = ftp_nlist($connect, $remote); 

      //关闭服务器 
      $this->closeServer($connect); 

      //返回结果 
      foreach ($result as $key => $value){ 
 if(in_array($value, array('.', '..'))) unset($result[$key]); 
      } 
      return array_values($result); 
    } 

     
    private function getServerConfig($flag = 'test'){ 
      $flag = strtolower($flag); 
      //测试服务器 
      if($flag == 'test') return $this->testServer; 
      //默认返回测试服务器 
      return $this->testServer; 
    } 
  }
  ?>

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