Extension:OpenGraphMeta

MediaWiki extensions manual

OpenGraphMeta Release status: beta
Implementation	Data extraction, Parser function
Description	Provides OpenGraph meta tags providing data for 3rd parties like Facebook to extract
Author(s)	Daniel Friesen (Dantmantalk)
Database changes	No
License	GNU General Public License 2.0 or later
Download	Download snapshot (Git master) Git [?]: repo summary browse file tree commit history
Parameters $egFacebookAppId $egFacebookAdmins
Hooks used ParserAfterTidy BeforePageDisplay
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OpenGraphMeta provides OpenGraph protocol metadata for articles on the wiki for 3rd parties like Facebook to extract. The primary use for this extension is for any wiki that provides its users a button to "Like" pages on the wiki, especially if the wiki uses a custom default skin. As sometimes Facebook can extract undesirable parts from the page (known on some custom skins to potentially extract random images irrelevant to the content) providing this data gives Facebook clean data to display in likes, and cleans up the long title into a pair of clean site and page titles. A parser function {{#setmainimage:Filename.ext}} which also exports what it is passed so you can use it easily in a [[File:{{#setmainimage:Filename.ext}}|thumb|right|...]] format can be used to set the image in the article which you prefer Facebook to use when displaying information about the page on your wiki (hint: This works very nicely when you incorporate it into an infobox template making the infobox image the preferred image for 3rd parties to use).

This extension can also be paired with Extension:Description2 which extracts description information from articles, when both are installed OpenGraphMeta will make use of the information Description2 extracts.

Installation

1. Download a snapshot and extract it to your extensions directory. Try the development version, or choose the version that matches your version of MediaWiki if the trunk version breaks.
2. Add
   require_once( "$IP/extensions/OpenGraphMeta/OpenGraphMeta.php" );
   to the bottom of LocalSettings.php.
3. Installation can now be verified through Special:Version of your wiki.

See Also

• Extension:Description2 – Provides page description information. When installed OpenGraphMeta will use the information it extracts from articles.
• http://developers.facebook.com/tools/debug - Simple tool that enables preview of what Facebook will display based on Open Graph meta tags