laravel5.5文件上傳

/**
     * 上傳文件
     * @param Request $request
     * @return array
     */
    public function upload(Request $request){
        $folder = 'Uploads/'.date('Ymd');
        if(!Storage::disk('public')->exists($folder)){
            Storage::makeDirectory($folder);
        }
        $files = $request->allFiles();//獲取所有文檔
        $fileid=[];
        foreach ($files as $file){
            if($file->isValid()) {
                $newFileName = md5(microtime()) . '.' . $file->getClientOriginalExtension();
                Storage::disk('public')->put($folder . '/' . $newFileName, file_get_contents($file));
                //文件類型
                $type = $file->getClientMimeType();
                $size = $file->getSize();
                $data = File::create(['filename' => $newFileName, 'filepath' => $folder,'md5' => '',  'mime' => $type, 'size' => $size]);
                array_push($fileid,$data->id);
            }
        }
        //return response
        return ['fileid'=>implode(',',$fileid)];
    }


/**
     * 刪除文件
     * @param Request $request
     * @return array
     */
public function destroy(Request $request)
    {
        $filename = explode(',',$request->input('filename'));
        $files = File::whereIn('filename',$filename)->get();
        $id = [];
        foreach ($files as $file){
            Storage::disk('public')->delete($file->filepath.'/'.$file->filename);
            $id[] = $file->id;
        }
        $result = File::destroy($id);
        if($result){
            return redirect()->back()->with('success','刪除成功');
        }else{
            return redirect()->back()->with('error','刪除失敗');
        }
    }