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Fabien Potencier
@fabpot
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No content
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What is Symfony 4?
= Symfony 3.4 LTS
- deprecated features
- long term support
- PHP 5 support
+ new dev workflow via Flex
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Flex
Composition over Inheritance
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Flex in 1 sentence
Flex helps developers manage the life-cycle of
project dependencies by automating boring
tasks,
For projects of any size, from micro to monolith,
For any kind of applications, API or Web.
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Flex in 10 seconds
Projects do not depend on symfony/symfony
No third-party dependencies/bundles
Add dependencies when you need them
Nothing to remove, the bare minimum
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Flex behind the scenes
Composer plugin
Uses “recipes” to install/uninstall any Composer
package (enables bundles, auto-configures
packages, …)
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Flex
in action…
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$ composer create-project symfony/skeleton demo
# Before Symfony 4 stable
$ composer create-project -s beta symfony/
skeleton demo
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symfony/skeleton
"require": {
"php": "^7.0.8",
"symfony/console": "^4.0",
"symfony/flex": "^1.0",
"symfony/framework-bundle": "^4.0",
"symfony/lts": "^4@dev",
"symfony/yaml": "^4.0"
},
"require-dev": {
"symfony/dotenv": "^4.0"
},
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symfony/lts
Enforces Long Term Supported versions of the
Symfony Components
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$ composer create-project symfony/skeleton demo
Demo
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$ composer create-project symfony/skeleton demo
Demo
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$ composer create-project symfony/skeleton demo
Demo
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$ composer create-project symfony/skeleton demo
Demo
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$ tree -I vendor
$ find . -type f | wc -l
Symfony 4 is lightweight
Only 13 files
vs 31 SE
2503 total
vs 8867 SE
-70%
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New directory structure
• Less depth, easier to navigate
• Non-PHP files in their own directories (assets/,
templates/)
• Decoupled from Symfony (assets/, src/,
templates/, public/)
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https://github.com/symfony/recipes/
symfony/framework-bundle/3.3
Demo
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symfony.lock
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Recipes repositories
https://github.com/symfony/recipes
Curated recipes by Symfony core team
https://github.com/symfony/recipes-contrib
Open to all contributions
150+ recipes
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Symfony Bot
Validates contributions
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Symfony Bot
Let’s you test a recipe
before merging
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Symfony Bot
Auto-merge pull requests
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$ composer show | wc -l
Demo
Only 21 deps
vs 38 + 50 = 88 SE
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Symfony Standard Edition
Monolog Bundle
SwiftMailer Bundle
Polyfill Util
Polyfill PHP 7.0
Polyfill PHP 5.6
Polyfill Mbstring
Polyfill Intl ICU
Polyfill APCu
PHPUnit Bridge
Debug Bundle
Framework Bundle
Security Bundle
Twig Bundle
WebProfiler Bundle
WebServer Bundle
Doctrine Bridge
Monolog Bridge
Twig Bridge
Monolog
Doctrine (11)
SecurityChecker
Generator Bundle
ParamHandler
FrameworkExtra
Bundle
Distribution Bundle
Asset
BrowserKit
Cache
ClassLoader
Config
Console
CssSelector
Debug
DependencyInjection
DomCrawler
Dotenv
EventDispatcher
ExpressionLanguage
Filesystem
Finder
Form
HttpFoundation
HttpKernel
Inflector
Intl
Ldap
OptionsResolver
Process
PropertyAccess
PropertyInfo
Routing
Security
Serializer
Stopwatch
Templating
Translation
Validator
VarDumper
WebLink
Workflow
Yaml
4 bridges
15 librairies
11 bundles
42 components
SwiftMailer
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Symfony Flex / Symfony 4.0
Polyfill Mbstring
Framework Bundle
Cache
Config
Debug
DependencyInjection
Dotenv
EventDispatcher
Filesystem
Finder
HttpFoundation
HttpKernel
Routing
Yaml
0 bridges
1 library
1 bundle
13 components
Flex
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Demo
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$ ./bin/console
Demo
13 commands
vs 57 SE
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$ git init
$ git add .
$ git commit -m"init"
Demo
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$ composer req maker:dev-master
Demo
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Aliases
• Shortcuts for common packages (log, behat,
phpunit, …)
• Optimized for Symfony Components (no need
to use the symfony/ prefix, just workflow, dom-crawler, …)
• Opinionated choices (admin, api, orm, mailer, …)
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Packs
• Bundle several dependencies into a
consistent set (debug, profiler, api, …)
$ composer req debug
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Discover Aliases and Packs
https://symfony.sh/
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Flex private repositories
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$ composer config extra.symfony.id
Register
Flex private repositories
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$ composer req maker:dev-master
$ git diff config/bundles.php
Symfony Maker Bundle
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$ ./bin/console list make
Symfony Maker Bundle
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$ ./bin/console make:controller
Symfony Maker Bundle
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$ composer req annot
Symfony Maker Bundle
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$ ./bin/console make:controller DefaultController
Symfony Maker Bundle
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$ vim config/routes.yaml
Symfony Maker Bundle
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$ vim src/Controller/DefaultController.php
Symfony Maker Bundle
src/ is bundle-less
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Application code is no
longer divided into bundles.
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Symfony 4 helps you
grow your app
with ease
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$ composer req twig
Adding Twig
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Never define
your service again*
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Adding a Twig Extension
Where do I store
the Twig extension
class?
Which file do I
need to change to
register it?
Which tag do I need
to use?
How do I declare a
tag in YAML?
Which interface/class
do I need to implement/
extend? It’s too complex. What
about doing it the dirty
way and do it in the
controller instead?
hmm, ok
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$ ./bin/console make:twig-extension
Adding a Twig Extension
Add your logic in the
generated class…
DONE!
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Full Automation works for…
• Twig extensions
• Event listeners
• Doctrine repositories
• Commands
• Voters
• …
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Beyond “Hello World”
• Defining some models via Doctrine
• Adding an API for my model
• Managing data with an admin
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$ composer req orm admin api
Full stack really quick
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$ ./bin/console make:entity Product
$ vim config/packages/easy_admin.yaml
Full stack really quick
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$ vim .env
DATABASE_URL="sqlite:///%kernel.project_dir%/var/
data.db"
$ ./bin/console doctrine:database:create
$ ./bin/console doctrine:schema:update --force
Full stack really quick
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DSNs
parameters:
database_host: 127.0.0.1
database_port: null
database_name: symfony
database_user: root
database_password: null
Symfony 2/3
Symfony 4
DATABASE_URL = "mysql://[email protected]:3306/symfony"
MAILER_URL
REDIS_URL
…
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It works!
One line config change
One annotation added
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Symfony 4 with Flex recap
• Auto-configuration for any Composer package
• A new Maker bundle to simplify creating files
• Support for Flex private repositories
• No more boilerplate code, just business logic
• Controllers and commands are services now
• From micro to monolith
• Meta-packages doing a lot for you out of the box
Productivity
boost!
Better DX
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More with Symfony 4
• Dependency injection without thinking about it
• API Platform, the most advanced API system
• Admin, simple and powerful
• Symfony Encore, makes working with Webpack
enjoyable
Talk at
Cluj!
Talk at
Cluj!
Talk at
Cluj!
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More with Symfony 4
HTTP2
push
support Inject secrets
as parameters
(Docker/K8s)
Built-in PSR-3
logger
Env vars
where it makes
sense
DI simplified,
classes as IDs
PSR-11,
PSR-6, PSR-16
out of the box
Private
services by
default
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Env/Debug mode
// web/app_dev.php
$kernel = new AppKernel('dev', true);
$request = Request::createFromGlobals();
// ...
// web/app.php
$kernel = new AppKernel('prod', false);
$request = Request::createFromGlobals();
// ...
Symfony 2/3 Symfony 4
# .env
APP_ENV = dev
APP_DEBUG = 1
Enables the merge of
app.php and app_dev.php
to a single index.php
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… which simplifies running commands
# Symfony 2/3
$ ./bin/console foo:bar --env=prod —no-debug
$ SYMFONY_ENV=prod SYMFONY_DEBUG=0 ./bin/console
foo:bar
# Symfony 4
$ ./bin/console foo:bar
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Deprecating
the obsolete
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Long READMEs
are a thing of the past
WITHOUT
Flex
WITH
Flex
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Symfony Standard Edition
• Not available for Symfony 4
• But still maintained for Symfony 2.7 -> 3.4
• EOL November 2020
Use Flex
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Symfony Installer
• Not available for Symfony 4
• But still maintained for Symfony 2.7 -> 3.4
• EOL November 2020 Use plain
Composer
and Flex
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symfony/symfony as a dep
• Won’t be enforced
• But strongly not recommended
• Won’t be removed as still the best way to
manage the project
Use explicit
dependencies
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Silex
• New Symfony features not supported
• EOL June 2018
Use Flex
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symfony 1
• Last major release 7 years ago
• End of life 5 years ago
• End of infrastructure: December 2017
Use Symfony
2/3/4
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No longer recommended
• Symfony Standard Edition (EOL nov 2020)
• Symfony Installer (EOL nov 2020)
• symfony/symfony as a Composer dep (EOL nov 2020)
• Silex (EOL june 2018)
• symfony 1 (EOL dec 2017)
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https://symfony.com/4
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What’s next?
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needs you
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5 initiatives to grow
Led by the
community
Supported by the
Core Team
And SensioLabs
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5 new initiatives
… to grow the community
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Upgrade to 4
… all Symfony bundles and the ecosystem
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Recipes Team
… to review, approve, and merge contributions
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Security Team
… to manage the whole process
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Integrations
… to provide higher-level integrations
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Current “integrations”, small and big
• Monolog
• Gmail support in semantic configuration
• Assetic / Encore
• Bootstrap 3 / 4
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Some “random” ideas
• Search engine: Algolia, ElasticSearch
• Multi-factor authentication (Google Authenticator) / SAML
• Structured logs
• VueJS
• Queues / Workers
• Transactional email providers (Mailgun, Postmark, …)
• Payment gateways (Stripe)
• …
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Diversity
…scholarship, mentorship, …
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Thank you!