Server side technologiesSymfony

Web Technologies – Prof. Dr. Ulrik Schroeder – WS 2010/111The slides are licensed under a

Creative Commons Attribution 3.0 License

Robert Heim, Alexander Friesen, Diego Santos

Web-Project's Problems

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Web-Project's Problems

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● Security● Complexity, i.e.:

● different output formats (HTML5, XML, JSON, RSS feeds, ...)● Quality Control

● Portability (OS, Databases, ...)● Maintainability

Facing the Server Side

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Solution: Frameworks =Standards, Best Practices, … !

● Templating● Abstraction (i.e. Security, Database, Sessions, …)● Codegeneration● Proven, tested code● “Plugin” functionality

Symfony

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● PHP Framework● Founded by Fabien Potencier (2005)● Best Practices● (as seen in Ruby on Rails, Zend, etc.)● Low hosting requirements (PHP, Apache)● Totally Free & Open Source● Rich documentation and big community (10.000+)

Who uses Symfony?

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Who uses Symfony?

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MVC Pattern

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Symfony Approach - Overview

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● Application Model (MODEL)● Object Relational Mapper

● Modules● Templates (VIEW)● Actions (CONTROLLER)

● Customizing

Application Model

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● Define the Model(YAML-Format)

Application Model

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● Symfony related Glue Code

● Database schema

Generating:

Modules (!= Models)

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Templates:

Controller:

+ executeIndex(...)+ executeNew(...)+ executeShow(...)+ ...

Modules (!= Models)

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Templates:

Controller:

+ executeIndex(...)+ executeNew(...)+ executeShow(...)+ ...

Module generation

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● Model → standard operations:Create, Read, Update, Delete (CRUD)

● Generate● Controller: communicating to DB, validation, inject data in templates, ...● Templates: list of objects, forms, …

● Adjust / customize! (but Don't Repeat Yourself (DRY))→ Refactor!

Customization

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● Configuration files● OOP (extending, overwrite, etc.)● Hook Points● Plugins (1000+)

● User Management● Tagging● Commenting● … whole applications ...

What else?

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● URL Rewriting/Routing● Fixtures (example data for init-task)● Backend generation● Internationalization (i18n), localizing (i10n)● Convert App to Plugin● Easy Deployment● And much more!

→ www.symfony-project.org

Pro's and Con's

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● Pro's:● Fast development (generation)● Standards● Scaleability● Many Web-Developers know PHP

● Con's:● Have to learn the framework● Plugins not always stable● PHP (refactoring may be a pain in big projects)

Live Coding

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