.
The preferred way to install this extension is through composer.
Either run
php composer.phar require --prefer-dist ufoproger/yii2-file-attachment "*"
or add
"ufoproger/yii2-file-attachment": "*"
to the require section of your composer.json file.
Once the extension is installed, simply use it in your code by :
<?= \ufoproger\fileattachment\AutoloadExample::widget(); ?>```