<"YmdHis").rand(0, 999); 
    return $rule.'.'.$this->filetype; 
  } 
  private function MoveFile(){ 
    if ($this->errornum) { 
      $filepath=rtrim($this->filaepath,'/').'/'; 
      $filepath.=$this->newname; 
      if (@move_uploaded_file($this->tmpname,$filepath)) { 
        return true; 
       }else{ 
        $this->errormsg=$this->setOption('ErrorNum',-3 ); 
       } 
    }else{ 
      return false; 
    } 
  } 
  /** 
   +---------------------------------------------------------------- 
   * 错误信息函数 
   +---------------------------------------------------------------- 
   * @return string 
   */ 
   function getErrorNum() { 
    $erstr="上传文件<font color='red'>{$this->orginame}</font>出错"; 
    switch ($this->errornum) { 
      case 4: 
       $erstr.="没有文件被上传"; 
        break; 
      case 3: 
       $erstr.="文件只被部分上传"; 
        break; 
      case 2: 
       $erstr.="上传文件超过了HTML表单MAX_FILE_SIZE指定的值"; 
        break; 
      case 1: 
       $erstr.="上传文件超过了php.ini配置文件中upload_max_filesize的值"; 
        break; 
      case 0: 
       $erstr="上传{$this->orginame}成功"; 
        break;        
      case -1: 
       $erstr="未允许的类型"; 
        break; 
      case -2: 
       $erstr.="文件过大，不能超过{$this->maxsize}个字节";  
        break; 
      case -3: 
       $erstr.="上传失败"; 
        break; 
      case -4: 
       $erstr="创建上传目录失败，请重新指定上传目录"; 
        break; 
      case -5: 
       $erstr="未指定上传路径"; 
        break; 
      case -6: 
       $erstr="非法操作"; 
        break;                    
      default: 
       $erstr.="未知错误"; 
         
    } 
    return $erstr; 
  } 
 } 
?>