['enctype'=>'multipart/form-data'] // important ]); echo $form->field($files, 'file')->widget(FileInput::classname(),[ 'model' => $files, 'options' => ['multiple' => false], 'pluginOptions' => ['initialCaption'=>'*.doc, *.docx, *.pdf, *.jpg, *.png, *.zip, *.rar'], ])->label(Yii::t('app','DownloadMemeberDoc ID')); ActiveForm::end(); ?>