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

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

Then, based on these components

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.

Symfony basics

By akovalyov

Symfony basics

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