import('ORG.Net.UploadFile');
$upload = new UploadFile();// 实例化上传类
$upload->maxSize = 3145728 ;// 设置附件上传大小
$upload->saveRule = time();
$upload->allowExts = array('html', 'htm');// 设置附件上传类型
$upload -> savePath = './br_chats/';
if(!$upload->upload()) {// 上传错误提示错误信息
$this->error($upload->getErrorMsg());
}
目录是存在的