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Technical requirements

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More details can be found on Joomla.org.

Joomla 3.x Joomla 3.x

Software Recommended Minimum
PHP (Magic Quotes GPC off) 5.4 + 5.3.10 +
Supported Databases:
MySQL[1] (InnoDB support required) 5.1 + 5.1 +
MSSQL 10.50.1600.1 + 10.50.1600.1 +
PostgreSQL 8.3.18 + 8.3.18 +
Supported Web Servers:
Apache(with mod_mysql, mod_xml, and mod_zlib)[2][3] 2.x+ 2.x+
Hiawatha (with UrlToolkit support) latest 8.0
Nginx 1.1 1.0
Microsoft IIS 7 7


Joomla 2.5.x Joomla 2.5

Software Recommended Minimum
PHP 5.4+ 5.2.4+
Supported Databases:
MySQL[1] 5.0.4+ 5.0.4+
Supported Web Servers:
Apache (with mod_mysql, mod_xml, and mod_zlib)[2][3] 2.x+ 2.x+
Hiawatha (with UrlToolkit support) latest 8.0
Nginx 1.1 1.0
Microsoft IIS[4] 7 7


References

  1. 1.0 1.1 Joomla is not yet compatible with MySQL 6.x.
  2. 2.0 2.1 In order to use Search Engine Friendly URLs, you will need to have the Apache mod_rewrite extension installed.
  3. 3.0 3.1 The mod_suphp extension or mod_fcgid extension is recommended to enable Joomla to upload and execute files using secure file permissions.
  4. For Microsoft IIS you need MySQL 5.1 or newer.