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Symfony4
A new way to develop web applications
Antonio Perić-Mažar, Locastic

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Antonio Perić-Mažar
CEO @ Locastic
Co-Organizer @ BlockSplit Conference
Tinel Meetup
antonio@locastic.com
@antonioperic
@antonioperic

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Locastic
● We help clients create amazing web and mobile
apps (since 2011)
○ mobile development
○ web development
○ UX/UI
○ Training and Consulting
● @locastic
● www.locastic.com
● Split, Croatia
@antonioperic

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@antonioperic
Photo: Goran Leš

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30.11.2017

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@antonioperic
Fabien Potencier

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We can do better
● Installing a Bundle is too cumbersome
● Remove a Bundle is too cumbersome
@antonioperic

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We can do better
● Installing a Bundle is too cumbersome
● Remove a Bundle is too cumbersome
● The standard edition is not good enough
@antonioperic

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We can do better
● Installing a Bundle is too cumbersome
● Remove a Bundle is too cumbersome
● The standard edition is not good enough
● You always have a lot of code that you are not using
but it is to hard to remove it
@antonioperic

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Fabien Potencier

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Symfony4
● Starting as micro framework
● Compose your application / setup your stack
● Build API, console app, traditional web app or
whatever you want
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Symfony Flex
● Composer plugin
● Auto-configuration via recipes
@antonioperic

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Symfony Flex
● Composer plugin
● Auto-configuration via recipes
@antonioperic
Fabien Potencier

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Symfony flex
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Symfony flex
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Mailer manifest.json
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Symfony flex recipies
● Two repositories
● symfony/recipies
○ maintained by Symfony Core Team and holds only recipies
for Symfony components and bundles ‘opinionated’ by them
○ Can use alias
● symfony/recipies-contrib
○ Anyone can contribute
○ Cannot use alias
@antonioperic

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www.symfony.sh
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Directory structure
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Directory structure
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Directory structure
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we say goodby to app.php and
app_dev.php — this is now one
standard index.php file and
environment is set with
environmental variable APP_ENV

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Directory structure
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Directory structure
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Directory structure
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Directory structure
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Flex keeps tracks of the recipes it installed in a
symfony.lock file, which must be committed to
your code repository.

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Bundle-less applications
● Bundle vs no-bundle apps
● All in src folder
○ App/ namespace
○ You should separate, but no need for bundles
● Moving forward to standardisation
● It reduces the perceived complexity, also makes
your code feels more decoupled from symfony
● Bundle inheritance mechanisms are deprecated in
3.4 and were removed in 4.0
@antonioperic

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Let’s call this a small demo
- Our task will be to create simple Symfony console
application, a web crawler
- Steps:
- Create new symfony application
- composer create-project symfony/skeleton my_project
- Add Console component
- Add Doctrine
- Add Symfony Crawler component
- Do some code (we will not do code, idea is just to see the
flow of working with Symfony4)
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Create new Symfony4 application
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Create new Symfony4 application
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Add components
● Composer req cli
● Composer req doctrine
● Composer req symfony/dom-crawler
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Autowiring
● Introduced in Symfony 3 version
● Autowiring allows you to manage services in the
container with minimal configuration
● It reads the type-hints on your constructor (or other
methods) and automatically passes the correct
services to each method.
● Symfony's autowiring is designed to be predictable:
if it is not absolutely clear which dependency should
be passed, you'll see an actionable exception. @antonioperic

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Autowire
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Autowiring
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Symfony Webpack Encore
● Webpack encore is a simpler way to integrate
Webpack into your application
● Step forward after AsseticBundle
● composer require webpack-encore
● It can work outside of Symfony
@antonioperic

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About me
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DotEnv component
● The Dotenv Component parses .env files to make
environment variables stored in them accessible via
getenv(), $_ENV or $_SERVER.
● composer require symfony/dotenv
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DotEnv component
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Performance
Hello world test
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Fabien Potencier

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Performance
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Performance
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Fabien Potencier

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Updating to Symfony
● It is possible, not even to complex
● Need a little bit of time
● If you are using Symfony2.x, upgrade first to 3.4
@antonioperic

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Symfony 4.1 improvements
● Made csrf_token() useable without forms
● Csv processor for env variables
● Display DotEnv variables in profiler
● Session improvements
● Console improvements
● Workflow improvements
● Messenger component
https://symfony.com/blog/symfony-4-1-curated-new-
features @antonioperic

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Roadmap
@antonioperic

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7 months later
● It is great feeling to works with Symfony4
● Seems that Fabien and core team are making great
progress moving Symfony forward
● I love Flex
● It is seems much more natural to navigate through
new code structure and DX is much better
● Symfony community is awesome
@antonioperic

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7 months later
● Symfony is great as microframework
● With higher level of abstraction is more better for
prototyping and building things fast
● It will be much easier to start, but maybe even
harder to master for newbies (symfony2 wasn’t easy
to master)
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Thank you!
@antonioperic

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Questions?
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