Auto create folder and upload image in Yii2 - yii2

Question

I have created ..\frontend\web\uploads.
This is the function Create in PropertiesControllers.php configuration that I have:
public function actionCreate()
{
$model = new Properties();
$date = date('YmdHis');
if ($model->load(Yii::$app->request->post())) {
$file = \yii\web\UploadedFile::getInstance($model, 'url_img');
if (!empty($file))
$model->url_img = $date.$file;
if($model->save())
{
if (!empty($file))
$file->saveAs( Yii::getAlias('#frontend') .'/web/uploads/'.$date.$file);
return $this->redirect(['view', 'id' => $model->id]);
}
return $this->render('create', ['model' => $model]);
} else {
return $this->render('create', ['model' => $model]);
}
}
It works when uploads is existed. But I want to redirect to new folder in uploads as uploads\img
if (!empty($file))
$file->saveAs( Yii::getAlias('#frontend') .'/web/uploads/img'.$date.$file);
It show error because ../web/uploads/img is not existed.
I don't know to solve this issue. Help me!

Answer 1

I suggest you to create the img folder before $file->saveAs(. In Yii2,you can make use of yii\helpers\FileHelper to create a directory. If your problem is like img folder does not exists inside uploads,then you can create the folder with yii\helpers\FileHelper as
$path = Yii::getAlias('#frontend')."/web/uploads/img";
\yii\helpers\FileHelper::createDirectory($path, $mode = 0775, $recursive = true);
Full code
public function actionCreate() {
$model = new Properties();
$date = date('YmdHis');
if ($model->load(Yii::$app->request->post())) {
$file = \yii\web\UploadedFile::getInstance($model, 'url_img');
if (!empty($file))
$model->url_img = $date . $file;
if ($model->save()) {
if (!empty($file)) {
$path = Yii::getAlias('#frontend') . "/web/uploads/img";
//here you create the folder
if (\yii\helpers\FileHelper::createDirectory($path, $mode = 0775, $recursive = true)) {
$file->saveAs(Yii::getAlias('#frontend') . '/web/uploads/img/' . $date . $file);
}
}
return $this->redirect(['view', 'id' => $model->id]);
}
return $this->render('create', ['model' => $model]);
} else {
return $this->render('create', ['model' => $model]);
}
}
More info about FileHelper here http://www.yiiframework.com/doc-2.0/yii-helpers-filehelper.html