Uploading files

Handling file uploads is a pretty common task for a web application. Yii has some helpful classes built in to do this. Let's create a simple form that will allow uploading ZIP archives and storing them in protected/uploads.

Getting ready

Before starting with this recipe, perform the following:

1. Create a fresh application using yiic webapp.

2. In your protected directory, create an uploads directory.

How to do it...

1. We will start with the model, so create protected/models/Upload.php as follows:

   <?php
   class Upload extends CFormModel
   {
      public $file;
   
      public function rules()
      {
           return array(
               array('file', 'file', 'types'=>'zip'),
           );
       }
   }

2. Now we will move on to the controller, so create protected/controllers/UploadController.php:

   <?php
   class UploadController extends Controller
   {
      function actionIndex()
      {
         $dir = Yii::getPathOfAlias('application.uploads');
         $uploaded = false;
   
         $model=new Upload();
   
         if(isset($_POST['Upload...