Yii2 (advanced template) database backup & restore

Yii1 IF

 if(!empty($_GET['act']) and $_GET['act']=='update'):

 endif;

yii2-app-advanced

Installing using Composer

composer global require "fxp/composer-asset-plugin:~1.1.1"
composer create-project --prefer-dist yiisoft/yii2-app-advanced yii-application

https://github.com/yiisoft/yii2-app-advanced/blob/master/docs/guide/start-installation.md