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:

- php8-APCu
- php8-bcmath
- php8-bz2
- php8-ctype
- php8-calendar
- php8-curl
- php8-dom
- php8-gd
- php8-gettext
- php8-iconv
- php8-imagick
- php8-intl
- php8-ldap
- php8-mbstring
- php8-mysql
- php8-opcache
- php8-openssl
- php8-pcntl
- php8-pdo
- php8-phar
- php8-posix
- php8-redis
- php8-soap
- php8-sockets
- php8-sqlite
- php8-tokenizer
- php8-xmlwriter
- php8-xmlreader
- php8-zip
- php8-zlib

Composer will tell user whenever a platform requirement is missing.