user_guide_src/source/intro/requirements.rst
################### Server Requirements ###################
.. contents:: :local: :depth: 2
PHP and Required Extensions
PHP <https://www.php.net/>_ version 8.2 or newer is required, with the following PHP extensions are enabled:
intl <https://www.php.net/manual/en/intl.requirements.php>_mbstring <https://www.php.net/manual/en/mbstring.installation.php>_.. warning:: - The end of life date for PHP 7.4 was November 28, 2022. - The end of life date for PHP 8.0 was November 26, 2023. - The end of life date for PHP 8.1 was December 31, 2025. - If you are still using a PHP version below 8.2, you should upgrade immediately. - The end of life date for PHP 8.2 will be December 31, 2026.
.. note:: - PHP 8.5 requires CodeIgniter 4.7.0 or later. - PHP 8.4 requires CodeIgniter 4.6.0 or later. - PHP 8.3 requires CodeIgniter 4.4.4 or later. - PHP 8.2 requires CodeIgniter 4.2.11 or later. - PHP 8.1 requires CodeIgniter 4.1.6 or later. - Note that we only maintain the latest version.
Optional PHP Extensions
The following PHP extensions should be enabled on your server:
mysqlnd <https://www.php.net/manual/en/mysqlnd.install.php>_ (if you use MySQL)curl <https://www.php.net/manual/en/curl.requirements.php>_ (if you use :doc:CURLRequest </libraries/curlrequest>)imagick <https://www.php.net/manual/en/imagick.requirements.php>_ (if you use :doc:Image </libraries/images> class ImageMagickHandler)gd <https://www.php.net/manual/en/image.requirements.php>_ (if you use :doc:Image </libraries/images> class GDHandler)simplexml <https://www.php.net/manual/en/simplexml.requirements.php>_ (if you format XML)The following PHP extensions are required when you use a Cache server:
memcache <https://www.php.net/manual/en/memcache.requirements.php>_ (if you use :doc:Cache </libraries/caching> class MemcachedHandler with Memcache)memcached <https://www.php.net/manual/en/memcached.requirements.php>_ (if you use :doc:Cache </libraries/caching> class MemcachedHandler with Memcached)redis <https://github.com/phpredis/phpredis>_ (if you use :doc:Cache </libraries/caching> class RedisHandler)The following PHP extensions are required when you use PHPUnit:
dom <https://www.php.net/manual/en/dom.requirements.php>_ (if you use :doc:TestResponse </testing/response> class)libxml <https://www.php.net/manual/en/libxml.requirements.php>_ (if you use :doc:TestResponse </testing/response> class)xdebug <https://xdebug.org/docs/install>_ (if you use CIUnitTestCase::assertHeaderEmitted()).. _requirements-supported-databases:
Supported Databases
A database is required for most web application programming. Currently supported databases are:
MySQLi driver (version 5.1 and above only)Postgre driver (version 7.4 and above only)SQLite3 driverSQLSRV driver (version 2012 and above only)OCI8 driver (version 12.1 and above only)Not all of the drivers have been converted/rewritten for CodeIgniter4. The list below shows the outstanding ones.