In addition to the software itself, a standard MediaWiki installation has the following requirements:
- A web server is required to send the generated pages to your web browser.
- PHP is required to run the software.
- A database server is required to store the pages and site data.
In addition, there are various optional dependencies which are required if you want to use certain advanced features (see below).
Prerequisites can be installed individually or through the XAMPP installer (mind, that the particular version of XAMPP doesn't contain PHP 5.3.1 version). Remember to read the documentation for each individual component before installation. If your website is hosted (i.e. you don't have direct control over it) then contact the server administrators or hosting company to ensure these are installed.
Note that although MediaWiki ships with an installation script which provides web-based configuration of the most important elements, some knowledge of PHP is required for more detailed customizations.
Simple One-Download Installation
Use XAMPP http://www.apachefriends.org to install and configure all of the important packages with only one download. Good for Linux, Windows and more, and includes Apache, PHP and MySQL. Note that the latest version of XAMPP has moved past the PHP 5.3.1 release (5.3.8 at the time of this note) for Windows, so it should be working. However, it has not for Mac users.
In order to serve the generated pages to your browser, MediaWiki requires some web server software. Often you will not have a choice of which software to use - it will be the one provided by your hosting provider.
- Most installations use the Apache web server, available at the official download page.
- MediaWiki has also been tested under IIS 6.0, Cherokee, Hiawatha, Litespeed Standard (need a trick for math) and lighttpd.
- Sun has some installation instructions for running MediaWiki on the Sun Java System Web Server 7.0.
PHP is the programming language in which MediaWiki is written, and is required in order to run the software.
- For the latest stable version of MediaWiki, PHP version 5.3.2 or later is required.
- If you are unable to upgrade to PHP5.2, then you can use MediaWiki 1.19.7, which requires PHP version 5.2.0 or later
- The following extensions are required: Perl Compatible Regular Expressions (v4.0+), Session, Standard PHP Library. Note that all of these are enabled in PHP by default.
- MediaWiki's installer will warn if you don't have the optional PHP intl extension "to handle Unicode normalization". In Debian & Ubuntu, this is in the php5-intl package.
- On Ubuntu (at least) the php5-mysql package is required if you want MediaWiki to use MySQL.
- If you are installing MediaWiki on CentOS 5.6, use the php53 package instead of php. The php package contains PHP 5.1.x, which is not compatible with the latest version of MediaWiki.
If you need to compile PHP from source, then see PHP configuration for compilation options that affect MediaWiki.
MediaWiki stores all the text and data (content pages, user details, system messages, etc.) in a database, which it is capable of sharing with other web-based applications (phpBB, etc.). You will need one of the following database servers to run the latest version of MediaWiki:
- MySQL 5.0.2 or later* or MariaDB 5.1+
- PostgreSQL 8.1 or later (supported since MediaWiki 1.8) – also requires plpgsql and tsearch2. These may require a contrib package such as "postgresql-contrib-8.1" to be installed. See Manual:Installing MediaWiki#Postgres for more detail.
- SQLite 3
- Oracle (note: latest MediaWiki version may be not compatible with Oracle. See bug 43533).
The recommended minimum requirements are 256MB of RAM for a single-computer website and 80MB of storage, although this will not suffice for a busy public site or a site with uploading enabled. Some users have reported running MediaWiki on computers with as little as 48MB of RAM.
- ImageMagick or GD is required for image thumbnailing.
- TeX is required for the in-line display of mathematical formulae.
- Sendmail is required in order for the system to be able to send e-mails.
- Shell access is required to run maintenance scripts; upgrading may be more difficult without it.
For further information about the above items, see Manual:Installing third-party tools.
See also 
- Manual:OS specific help
- MediaWiki software bundles
- MediaWiki hosting services and wiki farms
- MediaWiki with BitNami
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