When comparing Slim vs Yii, the Slant community recommends Slim for most people. In the question“What are the best web frameworks to create a web REST API?” Slim is ranked 12th while Yii is ranked 16th. The most important reason people chose Slim is:
Slim's documentation is well organized and detailed, every concept is thoroughly explained and it is very helpful for both advanced users and beginners.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Well organized and thorough documentation
Slim's documentation is well organized and detailed, every concept is thoroughly explained and it is very helpful for both advanced users and beginners.
Pro A good starting point
Slim is minimal and that is a good thing if you want to start from there. It can be easily extended and even supports popular packages that are used in Laravel (like Illuminate\Database (eloquent)) for example.
Pro REST based
REST fans will love the REST based architecture.
Pro Supports tie-ins for Rack-like middleware
Rack is an interface used in Ruby frameworks used to group and order modules, which most of the time are Ruby classes, and specify between them.
Slim uses a simple concept for it's middleware. By wrapping HTTP requests and responses it unifies the middleware into a single method call.
Pro Useful classes
Contains classes for managing requests, responses, cookies, logging, views, HTTP caching, and more.
Pro Flexible
Slim doesn't demand that you stick to a fixed folder structure. As long as you load Slim the right way you can do anything from there the way you like it.
Pro Extremely lightweight
Paired with swoole it's a micro service powerhouse.
Pro Open source
The Slim Framework is open source and is released under the MIT public license
Pro Extremely customizable
You can add any dependency, package or class that you want to use as a contained dependency.
Pro Supports Php 5.3 and PHP 7
Pro Makes it easy to understand the way some abstract functions and classes are built
In Django most things are abstracted, you just call some function or class without knowing how they were built, but with Slim, you end up understanding the way some abstract functions and classes are built.
Pro Hooks for executing code at different points in its life-cycle
Slim supports code hooks for executing functions at different points in time during the application's lifecycle.
Pro Rapid development through code scaffolding
Yii takes care of repetitive tasks through Gii, a web-based scaffolding tool. Gii takes care of code generation and creating code templates for:
- Models
- Controllers
- Forms
- Modules
- Extensions
- CRUD controller actions and views
- There are a lot of scaffolding templates made by community for Gii, that improve generated code functionality by a lot.
- Gii is very easy to extend yourself.
Pro Comes with important security standarts
Since security is a crucial part of any application, Yii comes with great security features out of the box to help developers create a secure and reliable application. These security features contain but are not restricted to:
- Input validation
- Output filtering
- Features against SQL injection
- Cross-site scripting prevention
Pro Highly extensible
Yii is built to be extremely extensible. Virtually every component of the framework can be extended programmatically. For example, if you want to add a unique id to your views, it's very easy to do:
namespace app\components;
class View extends yii\web\View {
public $bodyId;
/* Yii allows you to add magic getter methods by prefacing method names with "get" */
public function getBodyIdAttribute() {
return ($this->bodyId != '') ? 'id="' . $this->bodyId . '"' : '';
}
}
Pro Integrated with a testing framework
Yii makes use of Codeception, a great PHP testing framework that helps developers run their tests. They can be unit, functional or acceptance tests since Codeception supports them all.
Pro Lots of plugins available
Yii has about 2000 addons hosted on Yii's official website. These addons significantly decrease development time and increase the developer's efficiency.
Pro License
Yii is free and open source and is distributed under the BSD License.
Pro Strong community support
Yii has a strong and rather large community behind it. This is proven by the great number of blog posts, tutorials, guides and reviews on the Yii framework as well as the great number of extensions developed for it.
Pro Easy to install
Yii uses Composer to handle it's dependency installation. This is rather easy and not very time consuming, although it should be noted that Composer is very resource-intensive considering what it's job is. But that is not really Yii's fault.
Pro Best framework for CRUD operation
Yii Framework Provides most of features require for crud functionalities like GridView, Listview and DetailView (with jquery search and validation functions) by generating using GII.
Pro Highly extensible without effort
Cons
Con Very little consistency among different versions
There have been quite some changes that break the compatibility between Slim 2 and Slim 3. Even if you learned how to work with the Slim 2, you will find that Slim 3 requires re-training.
Con Dependency injection is too weak
It is not really dependency injection, but just a configurable container.
Con Needs strong bases to create dependencies
The dependency container schema of Slim is one of the biggest PROS and CONS of the framework. It is true that this schema brings so much flexibility to add anything, but another thing that is true is that you need to have strong bases of patterns, and an extensive knowledge of your libraries to convert it into a Slim dependency.
Con Too minimal
While it's true that Slim is a microframework, it's still too minimal. When used for throwaway projects or simple prototypes, it's perfect. But in the long run, it becomes less and less useful and you end up in implementing a full custom framework in trying to tackle all the missing features.
Con Can be hard for beginners
Since Yii requires developers to write code following certain rules, or in other words, it requires developers to follow the "Yii way of doing things" it can be hard for beginners to warm up to it and start using it right away.
Con Not very good at many to many relations
(but there is a good plugin, namely CAdvancedArBehavior extension to do this)