文件上传类

            $rnd = rand(100,999);
            $name = date('Ymdhis') + $rnd;
            $name = $name.".".$this->ext;
        } else {
            $name = $savename;
        }
        $this->savename = $name;
    }
    /**
     * 删除文件
     * @param $file 所要删除的文件名
     * @access public
     */
    function del($file)
    {
        if(!@unlink($file))
        {
            $this->errno = 3;
            return false;
        }
        return true;
    }
    /**
     * 删除临时文件
     * @access proctect
     */
    function destory()
    {
        $this->del($this->file);
    }

    /**
     * 得到错误信息
    * @access public
      * @return error msg string or false
     */
    function errmsg()
    {
        global $UPLOAD_CLASS_ERROR;

        if ($this->errno == 0)
            return false;
        else
            return $UPLOAD_CLASS_ERROR[$this->errno];
    }
}
?>