Yii2多个文件上传不起作用

Question

当我尝试上传多个文件时，我无法执行此操作

模型文件

namespace app\models;

class ImageFiles extends \yii\base\Model
    {
        public $imageFiles;

        public function rules()
        {
            return [
                [['imageFiles'], 'file', 'skipOnEmpty'=>false, 'extensions'=>'jpg, png', 'maxFiles'=>4]
            ];


 }
    }

查看档案

     use yii\widgets\ActiveForm; 

     $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]); 

     echo  $form->field($model, 'imageFiles[]')->fileInput(['multiple'=>true, 'accept'=>'image/*']); 

     echo  \yii\helpers\Html::submitButton('Submit',['class'=>'btn btn-success']);

     ActiveForm::end();

控制器文件

namespace app\models;

class ImageFiles extends \yii\base\Model
    {
        public $imageFiles;

        public function rules()
        {
            return [
                [['imageFiles'], 'file', 'skipOnEmpty'=>false, 'extensions'=>'jpg, png', 'maxFiles'=>4]
            ];


 }
    }

namespace app\controllers; use Yii; class ImageFilesController extends \yii\web\Controller { public function actionIndex() { $model = new \app\models\ImageFiles(); if(Yii::$app->request->isPost){ $model->imageFiles = \yii\web\UploadedFile::getInstance($model, 'imageFiles'); print_r($model->imageFiles); return; } return $this->render('index', ['model'=>$model]); } } 没有显示任何错误，因为print_r($model->imageFiles)没有任何价值。但是当我使用$model->imageFiles时，它会打印所有图像细节。我很困惑，我做了yii文档所说的但是它不起作用。

Answer 1

对于多个文件，请使用UploadedFile::getInstances()

class ImageFilesController extends \yii\web\Controller
{
    public function actionIndex()
    {
        $model = new \app\models\ImageFiles();
        if(Yii::$app->request->isPost){

            $model->imageFiles = \yii\web\UploadedFile::getInstances($model, 'imageFiles');

            print_r($model->imageFiles);

            return;
        }
        return $this->render('index', ['model'=>$model]);
    }
}