1. Go to this page and download the library: Download pcrt/yii2-attachments library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
'modules' => [
'attachments' => [
'class' => 'pcrt\file\Module',
'filePluginSavePath' => '/files' //cartella del filesystem in cui salvare i file (all'interno della directory pubblica di yii)
]
]