yii 多文件上传 及查询

控制器

//多文件上传public function actionAdd(){   $model = new D3;   $file = $model->img = UploadedFile::getInstances($model, 'img');   //处理图片   foreach ($file as $key => $v)    {          $img[] = $v->name;                       }       //将数组转化为字符串       $img=implode(',',$img);       if ($model->upload())       {           $data = Yii::$app->db->createCommand()->insert("d3",['img'=>$img])->execute();           if($data)           {              return $this->redirect(['show']);           }       }       return $this->render('show',['model' => $model]);        }//查询public function actionShow(){   $data = Yii::$app->db->createCommand("select * from d3")->queryAll();   foreach ($data as $k => $v) {      //将字符串转化为数组      $arr=explode(',', $v['img']);      // print_r($arr);die;      $data[$k]['img']=$arr;   }   return $this->render('show',['data'=>$data]);}

model

<?phpnamespace app\models;use Yii;use yii\base\Model;use yii\web\UploadedFile;class D3 extends Model{    public $img;    public function rules()    {        return [            [['img'], 'file', 'extensions' => 'png, jpg', 'maxFiles' => 4],        ];    }    public function upload()    {        foreach ($this->img as $file)        {            $file->saveAs('uploads/' . $file->baseName . '.' . $file->extension);            }            return true;    }}

views 

<?phpuse yii\widgets\ActiveForm;?><?php $form = ActiveForm::begin([   'options' => ['enctype' => 'multipart/form-data'],   'action' => ['d3/add']]) ?>    <?= $form->field($model, 'img[]')->fileInput(['multiple' => true, 'accept' => 'image/*']) ?>    <button>Submit</button><?php ActiveForm::end() ?>

show

<center>   <table>      <th>ID</th>      <th>图片</th>      <?php foreach ($data as $k => $v) {?>      <tr>         <td><?php echo $v['id']?></td>         <?php foreach ($v['img'] as $key => $value) {?>             <td><img src="uploads/<?php echo $value;?>" alt="" width="100px"></td>         <?php         }?>      </tr>            <?php          }?>   </table></center>