In the process of the upgrades discussed in the previous post – Ubuntu 18.04(Bionic Beaver) to 22.04(Jammy Jellyfish) there were additional issues for Webtrees and PHP.
The current release of webtrees (2.1) requires PHP 7.4, 8.0, 8.1 or 8.2. In the process of upgrading, PHP 8.1 was installed but lacked the required modules to function properly. This can be solved by a simple apt-get command to install the required pieces:
sudo apt-get install php8.1-{cli,common,curl,zip,gd,mysql,xml,mbstring,imagick,intl}There is a discussion of this at https://www.webtrees.net/index.php/forum/help-for-2-0/35292-update-php-error-solved and https://www.webtrees.net/index.php/forum/help-for-2-0/35369-upgrade-ubuntu-to-20-04-02-broke-webtrees.
It is also worth noting the apache2 commands to enable/disable Apache PHP modules:
sudo a2dismod php7.4
sudo a2enmod php8.1There is a discussion of installing multiple versions of PHP at https://tecadmin.net/how-to-install-php-on-ubuntu-22-04/ and https://linux.how2shout.com/how-to-install-php-7-4-on-ubuntu-22-04-lts-jammy-linux/. The articles discuss a PPA for the versions not in the standard apt sources. Once multiple versions are installed installed you can use
sudo update-alternatives --config php
to change versions. You can easily confirm the default version using “php -v”.