DockuWiki create link broke.

This was result of introduction of PHP 8.0

This was fixed by rolling back to PHP 7.4

1. Stop Nginx and PHP8.04-FPM
2. add Ondřej Surý PPA to install different versions of PHP – PHP 5.6, PHP 7.x, and PHP 8.0 on the Ubuntu system.
3. setup PHP 7.4

Notable commands

sudo add-apt-repository ppa:ondrej/php
sudo apt install php7.4-fpm
sudo apt install php7.4-xml; apt install php7.4-mbstring; apt install php7.4-opcache php7.4-intl php7.4-json php7.4-gd php7.4-bz2 php7.4-curl php7.4-sqlite3
sudo update-alternatives --config php
 
#Select /usr/bin/php7.4 from menu
 
sudo systemctl start php7.4-fpm.service
sudo systemctl start nginx.service

Notes.Ensure nginx conf file for website is set to use the php7.4 socket. See /root/backups/42d.io-ssl-conf

Useful website