2. Episode 4:
The real C’n’O in The OC

3. Do You _stand Themes?
The real C’n’O in The OC
Special Guest: Mike Schroder
Hooking Up with WordPress

4. Michael Cain
!
Theme Generator at Automattic
@michaeldcain
!
mapandmenu.com

5. Konstantin Obenland
!
Code Wrangler at Automattic!
@obenland!
!
konstantin.obenland.it

6. Do You _stand Themes?

7. Starter Themes
• Not a parent theme.
• Not a theme framework.
• Foundation of a new theme.

8. Why Underscores
• Just the right amount.
• Experience from five default themes.
• Experience from creating themes for millions of users on
WordPress.com.
• Does everything the WordPress way.

9. Why Underscores
• Semi-standard for WordPress.org Theme Repository.
• Best feature is its lack of features! No tearing down
necessary.
• Readable code with good documentation.
• Very active community.

10. 2010 2011 2012 2013 2014
Pedigree
Twenty
Eleven
Twenty
Ten
Twenty
Twelve
Twenty
Thirteen
Toolbox
Twenty
Fourteen
Further
Twenty
Fifteen

11. 300,000 Downloads

12. 71 Contributors
from 18 countries

13. Most Popular WordPress Project*
*Starred PHP Projects on GitHub, excluding WordPress itself

14. Underscores.me
@underscoresme
git.io/_s

15. Still to come:
Special Guest: Mike Schroder
Hooking Up with WordPress

16. In no every way affiliated with
or and sponsored by…

17. WordCamp Ventura County
November 8th, 2014

19. Mike Schroder
Somewhat deep and superficially geeky

20. Mike Schroder
!
Developer; WordPress Specialist at DreamHost
@DH_Shredder
!
getsource.net

21. Hooking Up with WordPress
There’s more:

22. In no every way affiliated with
or and sponsored by…

23. WordCamp Maine
August 16th, 2014

25. Hooking Up with WordPress
Getting Started with Actions and Filters

26. WordPress Actions and Filters
Allow you to modify or add functionality
by calling functions at specific times.

27. WordPress Actions and Filters
Filters call functions that take some kind of input,
modify it, and return it.

28. function my_plugin_custom_content( $content ) {
$search = 'Michael Cain';
$replace = 'Michael "The Great" Cain';
$content = preg_replace( $search, $replace, $content );
!
return $content;
}
add_filter( 'the_content', 'my_plugin_custom_content' );

29. WordPress Actions
Actions call functions and
don’t care about their returned value.
A filter without arguments or a returned value.

30. function my_theme_google_font() {
wp_enqueue_style(
'my-theme-montserrat',
'//fonts.googleapis.com/css?family=Montserrat',
array(),
null
);
}
add_action( 'wp_enqueue_scripts', 'my_theme_google_font' );

31. Keep on Hookin’
Filter Functions
• add_action()
• has_action()
• do_action()
• do_action_ref_array()
• doing_action()
• did_action()
• remove_action()
• remove_all_actions()
Action Functions
• add_filter()
• has_filter()
• apply_filters()
• doing_filter()
• current_filter()
• remove_filter()
• remove_all_filters()

32. Keep on Hookin’
Filter Functions
• add_action()
• has_action()
• do_action()
• do_action_ref_array()
• doing_action()
• did_action()
• remove_action()
• remove_all_actions()
Action Functions
• add_filter()
• has_filter()
• apply_filters()
• doing_filter()
• current_filter()
• remove_filter()
• remove_all_filters()

33. The End
cain.obenland.it
!
@michaeldcain @obenland