/**
* @param $image 文件
* @param $imgName 重命名
*/
public function downImg($image,$imgName)
{
$url = "http://xxx.com/Uploads/";
$file_url = $url.$image;
$arr = explode(".",$image); //獲取後綴
$save_to = APP_ROOT."/Public/aimages1/$imgName.".$arr[1];
$content = file_get_contents($file_url);
file_put_contents(iconv('UTF-8','GBK',$save_to), $content);
}