How well do you know the API tools Joomla! 3 has to offer to developers? Take the guided tour with an experienced Joomla! developer and long-time contributor.

1. Hidden in plain site
Joomla! hidden secrets for code monkeys

3. Junior Dev Stuff

4. Input
$app = JFactory::getApplication();
$option = $app->input
->getCmd(‘option’);

5. File uploads
with security check
$app = JFactory::getApplication();
$option = $app->input->files
->get('file', array());

6. File uploads
without security check
$app = JFactory::getApplication();
$option = $app->input->files
->get('file', array(), 'raw');

7. Date and Time
$dateString = '2015-05-31 12:00:00';
$date = JFactory::getDate($dateString);
$format = JText::_('DATE_FORMAT_LC2');
echo $date->format($format);

8. URI manipulation
$uri = JUri::getInstance();
$uri->setVar('joomla', 'rocks');
echo $uri->toString();

10. Serious low-level stuff

11. $http = JHttpFactory::getHttp();
$response = $http->get('http://www.joomla.org/
download.html');
$this->out("HTTP Code: " . $response->code);
$this->out("Headers:n" . print_r($response-
>headers, true));
HTTP Transfers
without the pain of cURL and stream contexts

12. $stream = new JStream();
$stream->open(JPATH_SITE . '/tmp/temp.gz', 'w',
false, null, false, false, true);
$stream->write($buffer);
$stream->chmod();
$stream->close();
Stream file I/O
with transparent GZip / BZip2 support

13. JArchive::extract($archiveName, $targetFolder);
Extract archives
zip, tar, tar.gz / tgz, tar.bz2 / tbz

14. JStringPunycode::emailToPunycode('üser@êxαmpłe.com'
);
// üser@xn--xmpe-fpa54cg0l.com
JStringPunycode::urlToPunycode('http://
www.παράδειγμα.com');
// http://www.xn--hxajbheg2az3al.com
JStringPunycode::fromPunycode('http://www.xn--
hxajbheg2az3al.com');
// http://www.παράδειγμα.com
UTF-8 Domains
a.k.a. “Punycode” or IDNA conversion

15. $image = new JImage(__DIR__ . '/image.jpg');
$image->createThumbs([
'640x480', '320x200', '160x100', ‘80x50'
], JImage::SCALE_FILL, __DIR__ . '/thumbs');
Image manipulation
Thumbnails

16. $image = new JImage(__DIR__ . '/image.jpg');
$newImage = $image
->filter('grayscale')
->rotate('10', 0xFFFFFF, true)
->resize(320, 200);
$newImage->toFile(
__DIR__ . ‘/altered.png',
IMAGETYPE_PNG
);
Image manipulation
Alter and convert images

17. Files and databases

18. GitHub integration
JGithub

19. $patcher = JFilesystemPatcher::getInstance();
$patcher
->reset()
->addFile(
__DIR__ . ‘/file1.patch',
JPATH_BASE, 1
);
$patcher->apply();
Apply patch files
JFilesystemPatcher

20. $schemaUpdater = JSchemaChangeset::getInstance(
$db, '/path/to/sql/files'
);
$errors = $schemaUpdater->check();
$schemaUpdater->fix();
Update the schema
or get a list of errors (changes not applied)

21. $config = [
'dbinstaller_directory' => '/path/to/xml/files',
'option' => 'com_example'
];
$schemaUpdater = new FOFDatabaseInstaller($config);
// Install or update schema
$schemaUpdater->updateSchema();
// Remove the schema
$schemaUpdater->removeSchema();
XML-based schema updates
using FOFDatabaseInstaller

22. $db = JFactory::getDbo();
$exporter = $db->getExporter();
$xml = $exporter->asXml();
Exporting the database
Here Be Dragons!

23. $db = JFactory::getDbo();
$importer = $db->getImporter();
$importer->from($xml);
// Bug: mergeStructure is protected. Sad panda :(
// $importer->mergeStructure();
$reflection = new ReflectionObject($importer);
$method = $reflection->getMethod('mergeStructure');
$method->setAccessible(true);
$method->invoke($importer);
Importing the database
Here Be Dragons!

24. Dial the awesome to
eleven!

25. Services
Lots of!

26. JFacebook JLinkedin
JGoogle JTwitter
JMediawiki JOpenstreetmapJOauth1Client
JOauth2Client
Services
Lots of!

27. Cryptography
JKeychain & JCrypt
• 3DES
• Blowfish
• Rijndael256 (AES)
• Simple (don’t use)
• mcrypt

28. // Set up
$plugin = JFactory::getApplication()->getParams()
->get('captcha',
JFactory::getConfig()->get('captcha'));
$captcha = JCaptcha::getInstance($plugin, array(
'namespace' => 'myComponent'
));
// Show
echo $captcha->display('mycaptcha', 'mycaptcha');
// Validate
$code = JFactory::getApplication()->input->get('mycaptcha');
if (!$captcha->checkAnswer($code))
{
throw new RuntimeException('Bots not welcome', 403);
}
CAPTCHA
Keep bots away

29. $less = new JLess();
$less->ccompile($lessFile, $cssFile);
Compile LESS to CSS
Server-side, cached

30. $pathway = JFactory::getApplication()
->getPathway();
$pathway->addItem('MyItem', $url);
Manipulate breadcrumbs
Custom, in-component pathways

31. Microdata
Schema.org support
https://docs.joomla.org/Microdata

32. More than a CMS
Custom application types
• JApplicationCLI
• JApplicationWeb
• JApplicationDaemon

33. Photos by Smithsonian Institution, National Museum of American History

34. May the
Core
be with you

35. The End