laravel excel 导入

<pre name="code" class="php"> /**
     * 导入
     * 保存
     * fyj
     */
    public function importexambank(Request $request)
    {

        // dd($examfilename);

        ini_set('memory_limit', '-1');
        set_time_limit(0);
／／文件名称
        $file = $request->file('examfile');
        $allowed_extensions = ["xls", "xlsx"];
        $extension = $file->getClientOriginalExtension();

        if ($extension && !in_array($extension, $allowed_extensions)) {
            return ['error' => '仅支持格式xls, xlsx.'];
        }

        $dirfile = date('Ymd');

        if (!file_exists('images/uploads/' . $dirfile)) {
            if (!mkdir('images/uploads/' . $dirfile)) {
                return ['error' => '创建目录失败'];
            }
        }

        $destinationPath = "images/uploads/" . $dirfile;
        $filebasename = str_random(10) . mt_rand(10000, 99999);
        $originname = $filebasename . '.' . $extension;

        $file->move($destinationPath, $originname);

        Excel::load('images/uploads/' . $dirfile . '/' . $filebasename . '.' . $extension, function ($reader) {
            $examfile = $_FILES['examfile']['name'];

            $examfilearray = explode('.', $examfile);
            $examfilename = $examfilearray[0];

            // Getting all results
            $results = $reader->get()->toArray();

            foreach ($results[0] as $val) {

               ／／进行数据操作

            }

        });

        return redirect('/manage/exam');

    }