Joomla! Documentation™

Optional Requirements for Joomla! 4.x

This page lists optional technical requirements which are not required to install and run Joomla! but are required for some internal APIs.

Application
JApplicationDaemon	Requires PHP's ext/pcntl and ext/posix
Archive
BZ2	Requires PHP's ext/bz2
GZip	Requires PHP's ext/zlib
Zip	Requires PHP's ext/zip or ext/zlib
Cache
APC	Requires PHP's ext/apc on PHP 5.3 or 5.4, ext/apcu on PHP 5.5 or 5.6, unsupported on PHP 7.x (Note: THIS NEED TO BE CHECKED)
APCu	Requires PHP's ext/apcu on PHP 5.3+
CacheLite	Requires the PEAR Cache_Lite package (tested on 1.7.16, will work with 1.8)
Memcache	Requires PHP's ext/memcache and a Memcache server (Note: The Memcache extension is not compatible with PHP 7.x)
Memcached	Requires PHP's ext/memcached and a Memcached server
Redis	Requires PHP's ext/redis and a Redis server
Wincache	Requires PHP's ext/wincache (Windows only)
XCache	Requires PHP's ext/xcache
Client adapters
LDAP	Requires PHP's ext/ldap
HTTP/Curl	Requires PHP's ext/curl
HTTP/Socket	Requires PHP's fsockopen() function be enabled
HTTP/Stream	Requires PHP's fopen() function and allow_url_fopen enabled
Cryptography
JCrypt	Requires PHP's ext/mcrypt for all ciphers except the SodiumCipher which requires ext/sodium
JKeychain	Requires PHP's ext/openssl
Database
Microsoft SQL Azure	Requires PHP's ext/sqlsrv (the PHP 5.x extension only supports Windows, a Linux compatible version of the extension is available for PHP 7.x)
Microsoft SQL Server	Requires PHP's ext/sqlsrv (the PHP 5.x extension only supports Windows, a Linux compatible version of the extension is available for PHP 7.x)
MySQL	Requires PHP's ext/mysql (unsupported on PHP 7.x)
MySQLi	Requires PHP's ext/mysqli
Oracle	Requires PHP's ext/pdo with Oracle support (available for 3PD only; the CMS won't run with it)
PDO MySQL	Requires PHP's ext/pdo with MySQL support
PostgreSQL	Requires PHP's ext/pgsql
SQLite	Requires PHP's ext/pdo with SQLite support (available for 3PD only; the CMS won't run with it)
Image
	Requires PHP's ext/gd
	Requires PHP's ext/fileinfo
Session
APC	Requires PHP's ext/apc on PHP 5.3 or 5.4, ext/apcu on PHP 5.5 or 5.6, unsupported on PHP 7.x (Note: THIS NEEDS TO BE CHECKED)
Memcache	Requires PHP's ext/memcache and a Memcache server (Note: The Memcache extension is not compatible with PHP 7.x)
Memcached	Requires PHP's ext/memcached and a Memcached server
Wincache	Requires PHP's ext/wincache (Windows only)
XCache	Requires PHP's ext/xcache
OPTIONAL IMPROVEMENTS
String
mbstring	Enable PHP's ext/mbstring for the phputf8 library to use native functions