A short introduction to PHP and Symfony

1. There are plenty of other
frameworks in the sea PHP + Symfony
FINDOLOGIC GMBH
GEORG M. SORST
G.SORST@FINDOLOGIC.COM
WebDev Meetup 20.11.2013

2. FINDOLOGIC
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Search for online stores
>100M queries / month
A dozen servers
One of Salzburg’s most successful startups

3. Business

4. LAN

5. BBQ

6. Trachty Friday

7. We’re hiring
DEVELOPERS DEVELOPERS DEVELOPERS!

8. History
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Born in the web 20 years ago
Form interpreter to replace perl
Core is backed by a company (Zend)
1M to 100M hostnames in 10 years

9. Stack Overflow tags
Source: http://hewgill.com/~greg/stackoverflow/stack_overflow/tags/

10. W3Techs
Source: http://w3techs.com/technologies/overview/programming_language/all

11. Usage
◼ eCommerce: osCommerce, Zen Cart,
Magento, PrestaShop, OpenCart, Oxid,
xtCommerce, Shopware
◼ CMS: Wordpress, Joomla, Drupal
◼ Other: Wikipedia, Digg, Facebook

12. The good
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Dead simple: <?php echo “Hello
world”;
Runs everywhere
Documentation, Community, Extensions

13. The good
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Image processing, databases, mails,
character encoding, XML built-in
Few keywords and operators, high
readability

14. The bad
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Spaghetti code
Very loose typing: null == false ==
"" == 0 == "0" == array()
Inconsistent code base: strpos(),
str_rot13(), library not OO
Arbitrary filesystem structure

15. The getting better
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OO; Closures, Iterators, Generators
Standard PHP Library (SPL): queues,
stacks, lists, iterators
Tools: PHPUnit, PHPDocumentor, Mess
Detector, Checkstyle

16. Example
$numbers = array(1, 2, 3, 4, 5);
$divisor = 3;

17. Old school
$numbers = array(1, 2, 3, 4, 5);
$divisor = 3;
$filtered = array();
foreach ($numbers as $number) {
if ($number % $divisor == 0) {
$filtered[] = $number;
}
}

18. Middle school
$numbers = array(1, 2, 3, 4, 5);
$divisor = 3;
$filter = create_function('$number', “return
($number % $divisor == 0);”);
$filtered = array_filter($numbers, $filter);

19. New school
$numbers = array(1, 2, 3, 4, 5);
$divisor = 3;
$filter = function($number) use ($divisor) {
return ($number % $divisor == 0);
};
$filtered = array_filter($numbers, $filter);

20. Questions?

21. PHP Frameworks
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MVC
OO
ORM
Templates
...

22. Symfony
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MVC, OO
Created by Sensio labs
Documentation, Community, Events

23. Symfony
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URL Conventions
CRUD generators
Doctrine ORM, Twig templates
Loosely coupled components
Dependency injection

24. Demo Time

25. Summary
“PHP is the Nickelback of programming
languages”
- Jeff Atwood, Stack Exchange

26. Summary
“The only conclusion I can draw is that
building a compelling application is far
more important than choice of language”
- Jeff Atwood, Stack Exchange

27. Thanks!

28. Backup: Install instructions
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Change user: sudo su - www-data -s /bin/bash
Download Symfony 2.3 Standard Edition (without Vendors): http://symfony.com/download
Setup git repository: http://symfony.com/doc/current/cookbook/workflow/new_project_git.html
Install composer: curl -sS https://getcomposer.org/installer | php
Install libraries: php composer.phar install
Configure: http://localhost/~georg/webdev/web/config.php
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pdo_sqlite
db path: %kernel.root_dir%/data/example.db
c. no password
Generate bundle: php app/console generate:bundle
Generate entity: php app/console generate:doctrine:entity
Drop the old DB schema: php app/console doctrine:schema:drop --force
Generate DB schema: php app/console doctrine:schema:create
Generate CRUD: php app/console generate:doctrine:crud
http://localhost/~georg/webdev/web/app_dev.php/post/
Add pretty CRUD bundle: https://github.com/jordillonch/CrudGeneratorBundle
Install new bundle: php composer.phar update
Delete the old CRUD: rm -fr src/FINDOLOGIC/ExampleBundle/Resources/views/Post/
src/FINDOLOGIC/ExampleBundle/Controller/PostController.php
src/FINDOLOGIC/ExampleBundle/Form/PostType.php
src/FINDOLOGIC/ExampleBundle/Tests/Controller/PostControllerTest.php
Generate new CRUD: php app/console jordillonch:generate:crud
Fill created_at automatically: http://stackoverflow.com/questions/17321893/automatic-values-for-updated-atcreated-at-in-doctrine
a. Remove created_at from src/FINDOLOGIC/ExampleBundle/Form/PostType.php
18. http://localhost/~georg/webdev/web/app_dev.php/post/