How to upload several files using Yii2 - yii2

Question

Following code just uploads one file instead several files.
Any ideas, how to fix that?
Here is my model:
<?php
//Code programmed by Thomas Kipp
//Change it, learn it, do as u please!
///path:/models/
namespace frontend\models;
use Yii;
use yii\base\Model;
class myScriptForm extends Model{ // A new Class programmed by Thomas Kipp
...
public $avatar;
...
public function rules() {
$avatar=array();
return [
['avatar[]','file']]
}
}
//End of class
?>
Here is my method of SiteController:
public function actionScript() { //A new method, programmed by Thomas Kipp
$model = new myScriptForm();
if ($model->load(Yii::$app->request->post()) && $model->validate()) {
$model->avatar = UploadedFile::getInstances($model, 'avatar[]');
if ($model->avatar) {
echo "<font size='4'><br><center>File <font color='red'> "
. "$model->avatar<font color='black'> successfully uploaded."
. "<br>It's available in folder 'uploadedfiles' </font></font color></center>";
$model->avatar->saveAs(Yii::getAlias('#uploadedfilesdir/' . $model->avatar->baseName . '.' . $model->avatar->extension));
} else
echo"<font size='4'><br><center>No Upload-file selected.<br>"
. "Nothing moved into folder 'uploadedfiles' </font></center>";
return $this->render('myScript', ['model' => $model]);
}
else {
return $this->render('myScript_Formular', ['model' => $model]);
}
}
and still my Formular, which is not uploading several files:
<?=
$form->field($model,'avatar[]')->widget(FileInput::classname(), ['options' => ['accept' => 'image/*', 'multiple' => true],])
?>

Answer 1

First of all, if you have something like echo (...) in controller - youre doing something wrong.
In your code youre not doing any foreach over uploaded files, so it's saving only one.
Yii2 - Uploading Multiple Files - here you have full guide how to upload multiple files, with examples etc.

Answer 2

Below code works for me, hope this will help you,
View file =>
<?= $form->field($model, 'image_files[]')->fileInput(['multiple' => true,'accept' => 'image/*']) ?>
Controller =>
$imagefiles = UploadedFile::getInstances($model, 'image_files');
$model->image_files = (string)count($imagefiles);
if (!is_null($imagefiles)) {
$dirpath = dirname(getcwd());
foreach ($imagefiles as $file) {
$productimage = new ProductImages();
$productimage->image_name = '/admin/uploads/'.$file->baseName.'.'.$file->extension;
$productimage->product_id = $model->id;
if ($productimage->save()) {
$file->saveAs($dirpath . '/admin/uploads/' . $file->baseName . '.' . $file->extension);
}
}
}