PHP Versions for Horde 6

Horde 6 requires PHP 8.1 or PHP 8.2 versions.
Support for PHP 8.3 is in development.

Ubuntu and Debian

Install following packages:

sudo apt-get install composer
sudo apt-get install php-xml
sudo apt-get install php-curl
sudo apt-get install php-ldap
sudo apt-get install php-bcmath
sudo apt-get install php-mysql

PHP Extensions

- PHAR extension is required for composer and other utilities
- gettext for localisation
- intl
- iconv
- PDO and SQL Database extensions
- curl for API requests

Depending on installed Horde applications and used backends, other extensions are required.
For a fairly complete reference, the groupware container image currently uses these PHP extensions:

- php-apcu
- php-bcmath
- php-bz2
- php-ctype
- php-calendar
- php-curl
- php-dom
- php-gd
- php-iconv
- php-imagick
- php-intl
- php-ldap
- php-mbstring
- php-mysql
- php-opcache
- php-pdo
- php-phar
- php-posix
- php-redis
- php-soap
- php-sockets
- php-sqlite3
- php-tokenizer
- php-xmlwriter
- php-xmlreader
- php-zip

Composer will tell user whenever a platform requirement is missing.