yii框架多文件上傳

//控制器層

<?php
namespace app\controllers;

use app\models\Uploads;
use Yii;
use yii\web\Controller;
use yii\web\UploadedFile;

class UploadsController extends Controller
{
    public function actionUpload()
    {
        //實例化數據表
        $model = new Uploads();
        $id = yii::$app->db->createCommand("select id from upload order by id desc limit 1")->queryOne();
        $cid = $id['id'];
        //判斷傳值方式是否為post提交方式
        if (Yii::$app->request->isPost) {
            $model->imageFiles = UploadedFile::getInstances($model, 'imageFiles');
            $model->imageFiles = $model->upload();
            $arr = $model->imageFiles;
            foreach ($arr as $key=>$val){
                yii::$app->db->createCommand("insert into uploads (cid,imageFiles) values ('$cid','$val')")->execute();
            }
        }
        return $this->render('upload', ['model' => $model]);
    }
}

//模型層

<?php
namespace app\models;

use yii\db\ActiveRecord;

class Uploads extends ActiveRecord
{
    //設定圖片上傳驗證規則  eg:上傳圖片格式&圖片個數等等
    public function rules()
    {
        return [
            [['imageFiles'], 'file', 'skipOnEmpty' => true, 'extensions' => 'png, jpg', 'maxFiles' => 8],
        ];
    }

    public function upload()
    {
        if ($this->validate()) {
            foreach ($this->imageFiles as $file) {
                $file->saveAs('uploads/' . $file->baseName . '.' . $file->extension);
                //實現文件上傳入庫路徑全名
                $arr[] =  'http://www.wechat.com/uploads/' . $file->baseName . '.' . $file->extension;
            }
            return $arr;
        } else {
            return false;
        }
    }
}

//視圖層

<?phpuse yii\widgets\ActiveForm;?><?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?><?= $form->field($model, 'imageFiles[]')->fileInput(['multiple' => true, 'accept' => 'image/*']) ?>    <button>Submit</button><?php ActiveForm::end() ?>