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More details can be found on the Joomla! Downloads Portal.
Requirements for Supported Software
|PHP (Magic Quotes GPC, MB String Overload = off / Zlib Compression Support, XML Support, INI Parser Support, JSON Support, Mcrypt Support, MB Language = Default)||5.6 + or 7 +||5.3.10 +||www.php.net|
|MySQL (InnoDB support required)||5.5.3 +||5.1 +||www.mysql.com|
|SQL Server||10.50.1600.1 +||10.50.1600.1 +||www.microsoft.com/sql|
|PostgreSQL||9.1 +||8.3.18 +||www.postgresql.org|
|Supported Web Servers:|
|Apache(with mod_mysql, mod_xml, and mod_zlib)||2.4 +||2.x +||www.apache.org|
|Nginx||1.8 +||1.0 +||wiki.nginx.org|
- PHP 5.3.1 is required for versions 3.0 through 3.2. At 3.3, the minimum is raised to PHP 5.3.10.
Only Joomla! versions 3.5 and later are compatible with PHP 7.
- Joomla is not yet compatible with MySQL 6.x.
- In order to use Search Engine Friendly URLs, you will need to have the Apache mod_rewrite extension installed.
- The mod_suphp extension or mod_fcgid extension is recommended to enable Joomla to upload and execute files using secure file permissions.
Optional Requirements for Joomla! 3.x
Some optional technical requirements aren't required to install and run Joomla! but are required for some dependencies running different internal APIs.