CSI: WordPress -- Getting Into the Guts

CSI:Getting Into the GutsWordCamp Birmingham, January 14, 2012

Version 0.5 Please note that due to unforeseen events, I did not complete this slide deck to my satisfaction before presenting it at WordCamp Birmingham. I will be doing this presentation again at WordCampAtlanta, with an improved version of these slides. At that time, I will replace this presentation with the new, improved version which will contain more concrete developer information, code samples, and more comprehensive pointers to resources. Thank you for your understanding. -- Dougal

WordPressRocks!

WordPressRocks!Why?

ExtensibilityWordPress can do just about anyfreaking thing you can think of

Extensibility

Extensibility✤ Rich developer APIs

Extensibility✤ Rich developer APIs✤ Themes

Extensibility✤ Rich developer APIs✤ Themes✤ Plugins

API✤ Application Programming Interface

API✤ Application Programming Interface✤ “...a source code based speciﬁcation intended to be used as an interface by software components to communicate with each other.” – Wikipedia

What kind of APIs?✤ Pluggable functions✤ Hooks ✤ Actions and Filters✤ Metadata ✤ Post meta, User meta, Comment meta, Site Options✤ Custom Javascript and CSS

PluggableFunctionsLogin/Cookie/User infoEmail notiﬁcations, wp_mail()Security: nonces, password salts &hashesAvatarsDisplay of revision diffs

Themes✤ Sidebars and Widgets✤ Custom Headers and Backgrounds✤ Custom Post Types and Taxonomies

Plugins

Plugins✤ Plugins can do... practically anything:

Plugins✤ Plugins can do... practically anything: ✤ Modify posts/pages

Plugins✤ Plugins can do... practically anything: ✤ Modify posts/pages ✤ Integrate 3rd party data (Twitter, Facebook, etc.)

Plugins✤ Plugins can do... practically anything: ✤ Modify posts/pages ✤ Integrate 3rd party data (Twitter, Facebook, etc.) ✤ Extend user info

Plugins✤ Plugins can do... practically anything: ✤ Modify posts/pages ✤ Integrate 3rd party data (Twitter, Facebook, etc.) ✤ Extend user info ✤ Use Roles & Capabilities to control access to features

Plugins✤ Plugins can do... practically anything: ✤ Modify posts/pages ✤ Integrate 3rd party data (Twitter, Facebook, etc.) ✤ Extend user info ✤ Use Roles & Capabilities to control access to features ✤ Create workﬂows (e.g., EditFlow plugin)

Plugins✤ Plugins can do... practically anything: ✤ Modify posts/pages ✤ Integrate 3rd party data (Twitter, Facebook, etc.) ✤ Extend user info ✤ Use Roles & Capabilities to control access to features ✤ Create workﬂows (e.g., EditFlow plugin) ✤ Alternative login systems (LDAP, SSO)

Plugins✤ Plugins can do... practically anything: ✤ Modify posts/pages ✤ Integrate 3rd party data (Twitter, Facebook, etc.) ✤ Extend user info ✤ Use Roles & Capabilities to control access to features ✤ Create workﬂows (e.g., EditFlow plugin) ✤ Alternative login systems (LDAP, SSO) ✤ The sky’s the limit!

ActionsActions are eventsUse them to DO something, ratherthan to CHANGE something

Actionsplugins_loaded()setup_theme()wp_init()template_redirect()wp_head()wp_footer() http://andy.wordpress.com/2008/10/30/wordpress-include-stack/

FiltersModify existing content<?phpadd_filter( ‘the_content’, ‘lolify’ );function lolify( $text_in ) { $text out = do_cool_stuff( $text_in ); return $text_out;}?>

MetadataLets you add additional details beyondwhat WordPress provides out-of-the-box.

Metadata✤ “Data about Data”Lets you provide additionaldetails that may or may not bevisible on the site.

Putting ittogether✤ codex.wordpress.org✤ make.wordpress.org✤ wpdevel.wordpress.com

Who are you?Dougal Campbell@dougaldougal.us /dougal.gunters.orgdougal.campbell@gmail.com

CSI: WordPress -- Getting Into the Guts

by Dougal Campbell on Jan 16, 2012

Accessibility

Categories

Tags

Upload Details

Usage Rights

2 Embeds 1,204

Statistics

CSI: WordPress -- Getting Into the Guts — Presentation Transcript

http://birminghamblogging.com	1203
http://translate.googleusercontent.com	1