TheSpecial:Version page on each wiki contains a list of extensions that have registered themselves with theMediaWiki software.All extensions can be installed without showing up onSpecial:Version, if the developer does notinclude the correct code to list it there.
For most extensions, copy the extension PHP file (or directory) to yourextensions/ folder and add the following statement to yourLocalSettings.php, withExtensionName being the filename of your extension, such asMyExtension.php.
require_once"extensions/ExtensionName/ExtensionName.php";
Since1.25 (2015), there is a new way of installing extensions, which works with extensions that supportextension registration.The equivalent for the extension above would be:
wfLoadExtension('ExtensionName');
Some extensions, however, have additional steps and/or different installation procedures.Some extensions will contain a text-file namedREADME (sometimesINSTALL) that will have more detailed information about that extension.
See also:Manual:Extensions#Installing an extension
SeeManual:Developing extensions.
If you're writing e.g. special page:
global$wgOut;$wgOut->enableClientCache(false);
For parser tag hooks:
functionwfSomeHookFunction($parser,$foo,$bar){$parser->getOutput()->updateCacheExpiry(0);...}
In case your extension output is only dependent on some option or user context and not time, you can still let it get cached by the parser cache but make sure it's marked as one output variant (of many possible).Use thePageRenderingHash hook to influence the cache hash accordingly.
$parser->disableCache() to disable caching, but this was deprecated in MW 1.28 and removed altogether in MW 1.35.When rendering output that will not be subject to parser cache, such as on a special page
global$wgOut;$wgOut->parse($text);
where$text is the wikitext to be parsed.
SeeManual:Tag extensions#How do I render wikitext in my extension?
You can't. Dynamic content can not be included in a static index.
SeeManual:Tag extensions#How can I avoid modification of my extension's HTML output?
SeeManual:Tag extensions#How can I pass XML-style parameters in my extension tag?
SeeManual:Tag extensions#Extensions and Templates
Your extension (or another one installed) might be usingparse() function instead ofrecursiveTagParse().Then change it torecursiveTagParse.
Use the Title class and the isProtected( ) method, e.g.
functionextensionFunction(){# Assume $title is the title objectif($title->isProtected('edit')){# Protected from editing, do things}else{# Not protected from editing}}
All the scripts in the /wiki structure need to be readable and executable by the user that PHP runs as.All perms are usually 755 and owner/group being adifferent user.The LocalSettings.php file is created by the script on setup and so will be an example to set the rest by.
SeeManual:Developing extensions#Registering features with MediaWiki