Symfony in Action: A PHP 5 Web Framework

symfony
in action.

WebTech 2007

symfony ?

• PHP 5 Web Framework

• Based on well-known projets (Mojavi, Propel, Prado …)

• Open-Source (MIT licence)

• Sponsored by Sensio ( http://www.sensio.com/ )

cite from symfony book

If you have been looking for a Rails/Django-like
framework for PHP projects with features such as:

· simple templating and helpers
· cache management
· multiple environments support
· deployment management
· scaffolding
· smart URLs
· multilingual and I18N support
· object model and MVC separation
· Ajax support

...where all elements work seamlessly together, then
symfony is made for you

don’t reinvent the wheel

• Follow best practices

• MVC Pattern : Model / View / Controller

• Unit and functional test framework

• Environment and deployment support

• Security (XSS protection)

• Extensible (plugin system)

a professional web framework

• Built from experience
• 1.0 stable, maintained with commercial
support
• Growing community
– Developpers in more than 80 countries
– 100 000 visitors per month on
symfony-project.com
• Open-Source Documentation
– The book (450 pages - GFDL)
– Askeet Tutorial (250 pages)

Sounds good ?
Let’s try it !

requirements

• PHP5

• Web server (Apache)

• RDBMS (MySQL)

installation

• Sandbox
> wget http://www.symfony-project.com/get/sf_sandbox.tgz

• PEAR
> pear channel-discover pear.symfony-project.com
> pear install symfony/symfony

• Subversion
> svn checkout http://svn.symfony-project.com/branches/1.0/
.

init new symfony project

Project

Application(s)
> mkdir WebTechComments
> cd WebTechComments
Module(s)

> symfony init-project WebTechComments
Actions(s)
> symfony init-app frontend
Composant(s)

Template

web server configuration

<VirtualHost *:80>

ServerName WebTechComments
DocumentRoot quot;/path/to/project/webquot;
DirectoryIndex index.php

Alias /sf /path/to/symfony/data/symfony/web/sf

<Directory quot;/path/to/project/webquot;>
AllowOverride All
</Directory>

</VirtualHost>

demo

Congratulations!

You have successfully created your
symfony project.

object-relational mapping

• Tables as classes and records as objects
public function getName()
{
return $this->getFirstName.' '.$this->getLastName();
Relational Object-Oriented
}

Table Class
public function getTotal()
Row, record Object
{
$total = 0;
Field, column Property
foreach ($this->getItems() as $item)
{
$total += $item->getPrice() * $item->getQuantity();
}

return $total;
}

• Object and Peer classes
$article = new Article();
...
$title = $article->getTitle();

$articles = ArticlePeer::retrieveByPks(array(123, 124, 125));

create database schema

#/config/schema.yml
propel:
sessions:
_attributes: { phpName: Session }
id:
date: timestamp
speaker: varchar(255)
topic: varchar(255)
description: longvarchar
comments:
_attributes: { phpName: Comment }
id:
sessions_id:
type: integer
foreignTable: sessions
foreignReference: id
onDelete: cascade
phpName: SessionId
peerName: SESSION_ID
author: varchar(255)
content: longvarchar
created_at:

build model and database

• Configuration
– database access
– Propel properties

• Build model > symfony propel-build-model
• Build SQL > symfony propel-build-sql
• Create database > symfony propel-insert-sql
• Do them all > symfony propel-build-all

define some test data

• Test data
# data/fixtures/data.yml
Session:
> symfony propel-load-data frontend
s1:
date: 06/29/2007
speaker: Test Speaker
topic: Test Topic
description: Just for testing
Comment:
c1:
sessions_id: s1
author: Teo Tester
content: It’s better when other do the tests

scafolding

• Create / Retrieval / Update / Delete (CRUD)

• Initiating or Generating Code
> symfony <TASK_NAME> <APP_NAME> <MODULE_NAME> <CLASS_NAME>
tasks: propel-init-crud, propel-generate-crud, and propel-init-admin

> symfony propel-generate-crud frontend session Session
> symfony propel-init-crud frontend comment Comment

routing

homepage:
Internal URI
url: /
<module>/<action>[?param1=value1][&param2=value2]
param: { module: session, action: list }

<?php echo url_for(‘@homepage’) ?> => /
External URL
http://www.example.com/module/action/[param1/value1]
session_view:
url: /session/:id.html
param: { module: session, action: view }
requirements:
id: d+

<?php echo link_to(‘@sesion_view?id=’.$session->getId()) ?> => /session/12.html

default:
url: /:module/:action/*

<?php echo url_for(‘session/view?id=’.$session->getId()) ?> => /session/view/id/12

view

• Templates
• Helpers
• Page layout
• Code fragments
– Partials
– Components
– Slots

view

<h1>Welcome</h1>

• Templates <p>Welcome back, <?php echo $name ?>!</p>
<p>What would you like to do?</p>
<ul>
• Helpers <li><?php echo link_to('Read', 'article/read') ?></li>
<li><?php echo link_to(‘Write', 'article/write') ?></li>
• Page layout </ul>

• Code fragments
– Partials
– Components
– Slots

view

<?php echo use_helper('HelperName') ?>
<?php echo use_helper('HelperName1', 'HelperName2' ) ?>
• Templates
<?php echo tag('input', array('name' => 'foo', 'type' => 'text')) ?>
• Helpers <?php echo tag('input', 'name =foo type=text') ?>
=> <input name=quot;fooquot; type=quot;textquot; />

• Page layout
• Code fragments
– Partials
– Components
– Slots

controller

• Front controller

• Actions

• Request

• User sessions
• Validation
• Filters

controller

1 Define the core constants.

• Front controller 2 Locate the symfony libraries.
3 Load and initiate the core framework classes.

• Actions 4 Load the configuration.
5 Decode the request URL to determine the action to
execute and the request parameters.

• Request 6 If the action does not exist, redirect to the 404 error
action.
7 Activate filters (for instance, if the request needs
• User sessions authentication).
8 Execute the filters, first pass.

• Validation 9 Execute the action and render the view.
10 Execute the filters, second pass.

• Filters 11# Output the response

controller

class mymoduleActions extends sfActions
{
public function executeIndex()
{
• Front controller // Retrieving request parameters
$password = $this->getRequestParameter('password');

• Actions // Retrieving controller information
$moduleName = $this->getModuleName();
$actionName = $this->getActionName();
• Request // Retrieving framework core objects
$request = $this->getRequest();

• User sessions $userSession = $this->getUser();
$response = $this->getResponse();

• Validation // Setting action variables to pass information to the
template
$this->setVar('foo', 'bar');

• Filters $this->foo = 'bar'; // Shorter version
}
}

controller

$this->getRequest()->

getMethod() sfRequest::GET sfRequest::POST

• Front controller getCookie('foo')
isXmlHttpRequest()
isSecure()

• Actions hasParameter('foo')
getParameter('foo')

• Request getParameterHolder()->getAll()

getLanguages()

• User sessions getAcceptableContentTypes()

getFileNames()

• Validation getFileSize($fileName)
getFileType($fileName)

• Filters setAttribute(‘foo’)
getAttribute(‘foo’)

controller

$this->getUser()->

• Front controller
setAttribute('nickname', $nickname)

• Actions getAttribute('nickname', ‘Default')

getAttributeHolder()->remove('nickname')
• Request getAttributeHolder()->clear()

• User sessions
$this->setFlash('attrib', $value)

• Validation $this->getFlash('attrib')

• Filters

controller

class myModuleActions extends sfActions
{
public function validateMyAction()
• Front controller {
return ($this->getRequestParameter('id') > 0);
}
• Actions
public function handleErrorMyAction()
{
• Request $this->message = quot;Invalid parametersquot;;

return sfView::SUCCESS;
• User sessions }

public function executeMyAction()
• Validation {
$this->message = quot;The parameters are correctquot;;
}
• Filters }

Questions ?

Петър Вукадинов (patter)
p.vukadinov@pi-consult.bg
p.vukadinov@gmail.com

Symfony in Action: A PHP 5 Web Framework

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