One of the common tasks the web application might be required to perform, especially the app using some kind of a CMS, is to save the history of data changes. Your client for sure will want the answer to this simple question - If I mess this up or delete by accident can we bring it back? Well, DB backup is one thing and quick recovery is another - let's talk about latter one.
It's well known that there are Lazy Loading approach and Eager Loading approach in the relational query. But it's very important to know how the Eager Loading approach works in Yii 2. It has changed drastically from that of Yii 1.1, and there are common misunderstandings about it in the community.
By Integrating the Zend 2.* framework into Yii you can quickly and painlessly generate XML outputs from your controllers. This will be helpful to anyone who has never done this before or only done it with Zend 1 as the introduction of namespaces can be strange when you first view them.