symfony - introduction

A Better Way to Build

Thursday, 27 September 12

Piers Warmers

@warmers

@pierswarmers

What’s on tonight?

Session 1.

• Introduction

Session 1.

• Introduction

• What is Symfony?

Session 1.

• Introduction

• Core concepts

Session 1.

• Introduction

• Core concepts

• A typical application

Session 1.

• Introduction

• Core concepts

• A typical application

• Lets code!

Session 2.

• CRUD and MVC (with the model)

Session 2.

• Cleaning up our interfaces

Session 2.

• Forms and validation

Session 2.

• Services and dependancy injection

Session 2.

• An overview of security

Session 2.

• Using Symfony components without symfony

Session 2.

ce qui est Symfony?

Symfony is…

• a full stack framework (PHP 5.3+)

“Symfony is a reusable set of standalone, decoupled and cohesive PHP components that solve common

web development problems”Dries Buytaert (Founder of Drupal)

Problems?

• Connect requests to business logic (route ➜ code)

Problems?

• Handle environment configuration (dev, test, prod)

Problems?

• Secure an application (authentication, firewalls)

Problems?

• Render a response (templates)

Problems?

• Speed things up (compiling, caching, ESI, proxies)

Problems?

• Speed things up (compiling, caching, ESI, proxies)

• I18N & L10N (translations, regional formatting)

Standalone, decoupled?

Symfony & Components

BrowserKit

ClassLoader

Config

Console

CssSelector

DependencyInjection

DomCrawler

EventDispatcher

Finder

HttpFoundation

HttpKernel

Locale

Process

Routing

Security

Serializer

Templating

Translation

Validator

includes

See: http://symfony.com/components

“Let's try to eliminate the NIH

syndrome in the PHP world!”Fabien Potencier (Founder of Symfony)

Drupal & Symfony

BrowserKit

ClassLoader

Config

Console

CssSelector

DependencyInjection

DomCrawler

EventDispatcher

Finder

HttpFoundation

HttpKernel

Locale

Process

Routing

Security

Serializer

Templating

Translation

Validator

Version 8+

https://github.com/drupal/drupal/blob/8.x/index.php

Symfony is…

• a full stack framework (PHP 5.3+) ✓

Symfony is…

• application methodology (best practices, standards)

“A most important, but also most elusive, aspect of any tool is its

influence on the habits of those who

train themselves in its use.”Edsger Dijkstra (Computer Scientist)

Influence by example…

• a blueprint for applications (shape, vernacular)

• best practices (quality, testing)

• standardisation and consistency (PSR-0, PSR-1, PSR-2)

Symfony is…

• application methodology (best practices, standards) ✓

Symfony is…

• an enthusiastic community (it’s about people)

…and theres lots of them!

• large community (http://connect.sensiolabs.com)

• regional events (SymfonyLive - Paris, London, Berlin, San Francisco)

• involved (http://symfony.com/contributors)

• like to share (open source, permissive MIT style)

Symfony is…

• an enthusiastic community (it’s about people) ✓

Lets Go!Time to setup a project.

Installation in three steps

• get composer

• create project

• get composer

• create project

• start server

Dependency management

So the installation in three steps…

Get composer - it’s crazy simple!

Create a project

Run the server, we’re online!

Lets look inside ./demo1

The important parts…

• app ➜ AppKernal, cache, configuration, logs, console

• composer.json ➜ dependancy map

• composer.lock ➜ what was actually installed

• src ➜ you’re code goes here

• vendor ➜ other peoples code goes here (via composer)

• web ➜ server loads app.php here which loads…

AppKernal.php

In the browser

The console

./app/console

The console

• Time savers: build models, controllers and bundles

The console

• Manage cache removal

The console

• Update database schema

The console

• Send spooled emails

The console

• Build you own CLI tasks

The console

• Build you own CLI tasks

• Run the PHP test server

Built in PHP server is good for quick testing but... don’t use in production!

What’s my normal setup?

• PHP 5.4.6

• MySQL 5.5.25a MySQL Community Server

• PHP 5.4.6

• MySQL 5.5.25a MySQL Community Server

• Apache HTTP Server 2.2.22

Let’s look at the config…

Configure: hosts

Configure: Apache HTTP

Configure: MySQL CE

Through Apache

The Web Debug Toolbar

Web Debug Toolbar

• Displays resource usage

Web Debug Toolbar

• Monitors code execution times

Web Debug Toolbar

• Presents info on session, logs, exceptions

Web Debug Toolbar

• Provides insight into persistence layer

Web Debug Toolbar

• Provides insight into persistence layer

• Good for showing off in meetings

“Hello world!”The Demo App

What’s just happened?

htpp://…/hello/SydPHP

Request

Controller

What’s just happened?

/demo/hello/{name}

htpp://…/demo/hello/SydPHP

authentication, authorisation, resolving etc…

AcmeDemoBundle->helloAction($name)

hello.html.twig

layout.html.twig

./app/config/routing_dev.yml

./src/Acme/DemoBundle/Controller/DemoController.php

./src/Acme/DemoBundle/Resources/views/Demo/hello.html.twig

A template enginefor PHP?

Twig template engine

• Fast (compiled to optimised PHP)

• Concise (easy to learn, clean, designers will love you)

For example:

Output in PHP:

Output in Twig:

For example:

Output in PHP:

Output in Twig:

Twig templating

• Secure (escaped output, sandboxed)

Twig templating

• Extendable (custom tags and filters)

Twig templating

• Helps enforce SoC (helps keep templates for display only)

Twig templating

• Totally optional (you can still use PHP or both)

Twig templating

• Totally optional (you can still use PHP or both)

Twig templates can extend Layouts

(simplified)./src/Acme/DemoBundle/Resources/views/layout.html.twig

Coming up…

big thanks to

SensioLabs

PizzaTime!

Quick recap…

• We have a simple application setup

Quick recap…

• We’ve looked at:

Quick recap…

• routing

Quick recap…

• routing

• controllers

Quick recap…

• routing

• controllers

• templates

Quick recap…

• routing

• controllers

• templates

• Lets build a simple CRUD application

CRUD and MVC

htpp://…/products

Request

Controller

Model View

Doctrine DBAL and ORM

Before we get started…

Bundles & namespacesare your friends…

image by sergiu_bacioiu @

• Make life simpler (after some wtf moments)

• Should follow FIG standards (www.php-fig.org)

• Makes autoloading a breeze (ClassLoader component)

See here: http://symfony.com/doc/current/components/class_loader.html

• \Zend\Mail\Message ➜

/path/to/project/lib/vendor/Zend/Mail/Message.php

• \Zend\Mail\Message ➜

/path/to/project/lib/vendor/Zend/Mail/Message.php

• \Symfony\Core\Request ➜

/path/to/project/lib/vendor/Symfony/Core/Request.php

Lets create our own bundleAcme/Bundle/BlogBundle

./app/config/parameters.ymlGenerate the new bundle

The modelLets create our Doctrine entity

./app/config/parameters.ymlGenerate the new entity

The CRUD logicLets create our Controller

./app/config/parameters.ymlGenerate the new entity

2 Errors

Oh snap: part 1

./app/config/parameters.yml will fix this

Oh snap: part 2

Update the databaseThere’s a task for that.

./app/config/parameters.ymlGenerate the update query

Looks good, sort of?

Cleaning up

• Add our new layout template (apply it to views)

Cleaning up

• Add some CSS (quick look at asset linking)

Cleaning up

• Add some CSS (quick look at asset linking)

• Discover Assetic (images, css, javascript etc…)

./app/config/parameters.ymlLets use this simple template

./app/config/parameters.ymlAnd apply it to our templates

Why this?{{ asset('bundles/acmeblog/css/demo.css') }}

• Can prefix different paths (dev vs prod)

• Can be used for cache busting (v1, v2, v3, etc…)

./app/config/parameters.yml./app/config/config.yml

Assetic is the next step

• Advanced filters:

• Images (jpegoptim, optipng)

• CSS (combine and compress)

• JS (combine and compress)

• LESS, SASS (compile, combine, compress)

./app/config/parameters.ymlUpdate the layout…

Forms & Validation

Forms Widgets

./app/config/parameters.ymlSimple, elegant presentation

Constraints & Assertions

./app/config/parameters.ymlAssertions in annotations

Services

Lets improve Postwho’s setting the “created_at” property?

./app/config/parameters.ymlIn the model?

./app/config/parameters.ymlOn the object?

Maybe there’s a better way?

./app/config/parameters.ymlServices are global toolkits

Service ContainersDependancy Injection

“Dependency injection is a software design pattern that allows a choice of component to be made at run-time rather than

compile time. This can be used, for example, as a simple way to load plugins dynamically or to choose mock objects in test

environments vs. real objects in production environments.”Wikipedia

Finishing up

• Security (broad topic, demo app has an example)

Finishing up

• Firewalls (protect areas of application via routes)

Finishing up

• Authentication providers (in memory, HTTP, build you own, FOSUserBundle)

Finishing up

• Authentication providers (in memory, HTTP, build you own, FOSUserBundle)

• Authorisation (ACL in config or DB)

Out of time…Thursday, 27 September 12

A huge thanks to…

• SensioLabs: t-shirts, pizza, support

• SydPHP: organisation, support

Slides will be up on Speaker Deck shortly…

@warmers

symfony - introduction

e symfony

symfony isthursday

interfaces forms

application authentication

validation services

dependancy injectionthursday

response templatesthursday

overview of securitythursday

Documents

guia symfony

symfony consulting - womentalkbusiness · 2018-05-06 ·...

symfony - the symfony reference book

introduction of symfony development process & what's symfony...

beyond symfony 1.2 (symfony camp 2008)

symfony as a platform (symfony camp 2007)

symfony without frameworkbundle€¦ · @tobiasnyholm...

symfony framework deepdive -...

practical symfony | symfony | web php...

a practical introduction to symfony (european drupal days...

making symfony services async with rabbitmq (and more...

symfony...

an introduction to scaling symfony

symfony from scratch @ sfphp · symfony from scratch @...

introduction to symfony components and helper components in...

symfony internals

using symfony templating on symfony 1

symfony (1/3) | train to symfony

an introduction to symfony

symfony fabien potencier symfony