Symfony 2. The basics

By: Andrew Kovalyov

• Innovative and fun web agency since 2009
• A group of developers on Sf2 since 2010
• Contributing to the Symfony's ecosystem
• But also:
  • Angular.JS
  • Node.JS
  • symfony 1.x
  • Silex µframework

Agenda

• Why another framework?
• Composing your project dependencies.
• Doctrine ORM.
• Twig. One of the most flexible PHP  template engines.
• Symfony2. Request-Response model.
• Work'em all

Why another framework?

Are you a coder or an engineer

What Symfony2 provides you

• Stable codebase
• Well-tested codebase
• Well-documented codebase
• Codebase which is supported by community
• Codebase which is written according to the latest standards and requirements in the industry
• Codebase is licensed under MIT license

Defined roadmap of releases

Pros

• Enterprise-ready
• Interoperability
• Great ecosystem of bundles
• Great documentation
• Development process is transparent
• Code is written according to best practices in the industry

Cons

• Hard to understand for juniors
• Rather slow compared to micro-frameworks
• Huge codebase
• Best practice as a result of experience

Decoupled from beginning

31 component as for Symfony2.7

Orchestrate your dependencies

https://getcomposer.org

Ecosystem of components

Time for action

Doctrine project

Do not write OOP. Think OOP.

Doctrine project

• ORM (Object Relational Mapper)
• DBAL (Database abstraction layer)
• Common (Autoloading, annotations parser, caching)

And more

• MongoDB Document Mapper   
• PHPCR Document Mapper
• OrientDB Document Mapper
• CouchDB Document Mapper
• Migrations

So, what is ORM?

ORM in computer science is a programming technique for converting data between incompatible type systems in object-oriented programming languages. This creates, in effect, a "virtual object database" that can be used from within the programming language blah-blah-blah

(c) Wikipedia

So, WTF is ORM?

Let's see it in action

Twig

Templating for humans

Twig

• Fast
• Secure
• Flexible
• Extendible
• Human-friendly
• Template inheritance
• Template includes
• Sub-requests (Symfony2)

Let's see it in action too

Symfony2

Not MVC. Finally.

Symfony2 is a reusable set of standalone, decoupled, and cohesive PHP components that solve common web development problems.

Symfony2 is also a full-stack web framework

Symfony2 flow

Oops

Symfony2 Request-Response

Symfony2 flow

Let's combine it all together.

Conclusions

• It was just a quick introduction into Symfony2 world.
• It was a quick introduction into Symfony2 itself.
• You should be the engineer who decides either to write the code or write the application.
• But. If you want to be an engineer - you should at least be familiar with the best practices in PHP world.
• You have survived and the pizza is near.

Thank you.

I am ready for questions.