Manual:Extensions/ja

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拡張機能とは
Extensions let you customize how MediaWiki looks and works.

Wiki users can browse through existing extensions or request a new extension. System administrators can install (or remove) extensions on the MediaWiki installations that they manage. Developers can write new extensions or improve or maintain existing extensions.

拡張機能をキーワードで検索:
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拡張機能は以下のように使われます:


 * 記事を書くためにウィキマークアップを拡張します - 例はCategory:Parser function extensionsとCategory:Parser extensionsをご覧下さい.
 * 特別ページを通して新しい報告と運営上の機能を追加します - 例はCategory:Special page extensionsをご覧下さい.
 * スキンと様々なユーザインターフェイス拡張機能経由でMediaWikiの見た目を変更します - 例はSpecial:AllPages/Skin:とCategory:User interface extensionsをご覧下さい.
 * カスタム認証メカニズムを使用してセキュリティを強化します - 例は Category:Authentication and Authorization Extensionsをご覧下さい.

While some extensions are maintained by MediaWiki's developers, others were written by third-party developers. As a result, many have bugs, and they are not all guaranteed to be compatible with each other. Some are unmaintained; not all extensions work on all versions of MediaWiki. Use any extension, especially those tagged as insecure, at your own risk. When using an extension requiring patches to the core MediaWiki code or entries in your database(s), be sure to create a back-up of your database and/or the core MediaWiki code, to avoid the risk of permanently breaking your wiki.

拡張機能の参照
あらゆる種類の既に書かれた拡張機能がCategory:Extensions by categoryにあります. may also be helpful to pick out extensions. これらの拡張機能をインストールもしくは独自のものを作るための情報については、下記をご覧下さい.

インストールされた拡張機能の確認
Only someone with administration access to the filesystem (and often the database too) on a server can install extensions for MediaWiki, but anyone can check which extensions are active on an instance of MediaWiki by accessing the Special:Version page. たとえば、英語版ウィキペディアで利用できる拡張機能

拡張機能のインストール
サーバ管理者向け）MediaWikiはインストールが終わった直後に既に拡張機能を受け入れる用意が出来ています. 拡張機能を追加するために以下のステップに従います:


 * 1) '始める前に'
 * いくつかの拡張機能はパッチのインストールが要求されます. それらの多くはunixコマンドの使用によるインストールのために設計された手引きを提供しています. 拡張機能ヘルプページにリスト表示されたこれらのコマンドを入力するためにシェルアクセス(SSH)の権限が要求されることもあります.
 * 1) 拡張機能をダウンロードする. 
 * Extension Distributor helps you to select and download most of the popular extensions.
 * 拡張機能は通常モジュールパッケージとして配布されます. それらは一般的に | ]]/extensions/ の独自のサブディレクトリに入ります.   ウィキメディアの Git リポジトリに保存された拡張機能の一覧は git:mediawiki/extensions にあります.  Some extensions don't use version control are not recommended.
 * Some extensions are also available in bundles, or package repositories.
 * 1) 拡張機能をインストールする. .
 * Generally, at the end of the  file (but above the PHP end-of-code delimiter, " ", if present), the following line should be added:
 * This line forces the PHP interpreter to read the extension file, and thereby make it accessible to MediaWiki.
 * Some extensions can conflict with maintenance scripts, for example if they directly access $_SERVER (not recommended).
 * In this case they can be wrapped in the conditional so maintenance scripts can still run.
 * In this case they can be wrapped in the conditional so maintenance scripts can still run.


 * The maintenance script will fail for any extension which requires customized namespaces which is included inside the conditional above such as,.


 * Ensure that required permissions are set for extensions!
 * While this installation procedure is sufficient for most extensions, some require a different installation procedure. Check your extension's documentation for details.
 * If you want to alter configuration variables in LocalSettings.php, you have to do this typically after including the extension. Otherwise defaults defined in the extension will overwrite your settings.
 * While extension declaration can be placed in other places within the LocalSettings.php file, never place extensions before the  line for MediaWiki versions below 1.17 . Doing so will blank the extension setup function arrays, causing no extensions to be installed, and probably will make your wiki inaccessible until you fix it!

拡張機能のアップグレード
Some extensions require to be updated whenever you update MediaWiki, while others work with multiple versions. To upgrade to a new version of an extension:


 * 1) Download the new version of the extension
 * 2) Replace all the extension files in the extension/ExtensionName directory with the new files. Do not remove the extension configuration present in LocalSettings.php
 * 3) Depending on the extension, you may have to run the Update.php maintenance script. Most extensions will mention if this script needs to be run or not. (Running the update.php script when its unnecessary will not hurt anything, so if you're unsure don't be afraid to run it). If you don't have command line access, you can also use the web updater.
 * 4) That's all you need to do. In most cases any extension configuration you have in LocalSettings.php will also work with the newer version of the extension.

These instructions cover 99% of extensions. If the specific extension you are upgrading has instructions that differ from these, you should probably follow the specific extension's instructions

拡張機能のアンインストール
Extensions are added by adding a line to LocalSettings.php, which basically looks like this:

Depending on the extension you want to uninstall additionally other stuff might be done on installation, which you want to undo now. For details see the section on installing an extension.


 * 1) Remove this line and the extension is uninstalled. If you want to, you can (and if you do not want to use this extension in the future you should) remove the files of this extension inside the folder "extensions/".
 * 2) Maybe you also have some other lines in LocalSettings.php, which have to do with the extension you want to remove. Most likely this will be lines, which give certain users the right to access pages, which are provided by the extension. These lines contain the variable "$wgGroupPermissions" and make some settings there. As far as they have to do with rights, which come from the removed extension, you can remove these lines as well.
 * 3) Maybe your extension also has added columns to your database. The updater maintenance/update.php removes them, when you run it, after you have uninstalled the extension.

拡張機能の開発
This complex topic is handled on the developing extensions manual page.

関連項目

 * Project:Extension requests
 * - Information about translating extensions.
 * Project:Extension requests
 * - Information about translating extensions.
 * Project:Extension requests
 * - Information about translating extensions.
 * Project:Extension requests
 * - Information about translating extensions.
 * - Information about translating extensions.