It depends on your programming language. You can also choose full-stack MVC frameworks for other programming languages, if you like, e.g.
Python: Django, Ruby: Ruby on Rails, Node.js: Meteor.
Unique features about the Yii2 framework is certainly, that it brings a lot of things preinstalled, like Access Control Filters, Bootstrap and jQuery.
It has a very strong extention ecosystem with e.g. kartik, dosamigos, dektrium and mootensai doing a lot of great work. You can download all these things for free, just take a look at github.
The Gii CRUD code generator gets your project started pretty fast (also try the yii2-enhanced-gii extention, if you can).
I have seen all of the frameworks and tried all of them out. I have choosen the Yii2, because it IS the CS:=Computer Science, the others also the zend ISN’T really. The yii2 is the revolution not only with the PHP but also in the CS history.
@xPeng might be a rare exception who dared to try out all before choosing one.
Most of the Yii framework freaks including me (probably @jacmoe too) fell in love with it BY CHANCE. But now we are fairly confident that we were extremely lucky.
I actually actively chose Yii because I had ported Redmine from Ruby to PHP using CakePHP, but CakePHP was too slow and bloated to my liking, and thus I went shopping for something that was similar to CakePHP but leaner and meaner.
I found everything - and more! that I wanted in Yii - and the rest, as they say, is history
[Edit]
CakePHP is not slow and bloated anymore, but I am not sure how it compares with Yii in detail today.
The main reason why I chose CakePHP and then later Yii, is the fact that both frameworks implements their MVC framework really close to the way Ruby on Rails does it; in fact, I think they do this better than the original.
I appreciate your valuable time for giving me suggestions about different development frameworks. After finding here & there, now I find a professional company i.e. raindrops infotech which helps me for the development of web application and giving me high-quality results.
The thread starter has no interest in frameworks from the beginning. I just noticed that his profile page has a company logo of, well, what was it? I forgot.
He has done a really good job to disgrace his company.