discuz ftp用法

$upload = new discuz_upload();if($upload->init($_FILES['advnew'.$advnew['style']], 'common',66) && $upload->save(1)) {$ftpon = getglobal('setting/ftp/on');if($ftpon==1){$attachurl = getglobal('setting/ftp/attachurl');$res = ftpcmd('upload', 'common/'.$upload->attach['attachment']);if($res==1){$advnew[$advnew['style']]['url'] = $attachurl.'common/'.$upload->attach['attachment'];}}else{$advnew[$advnew['style']]['url'] = (!strstr($_G['setting']['attachurl'], '://') ? $_G['siteurl'] : '').$_G['setting']['attachurl'].'common/'.$upload->attach['attachment'];}}

先上传到本地现上传到ftp