How to upgrade to php v8 on Arch Linux
Let's switch to v8 now!
You could ignore the php packages until your web applications like Nextcloud, FreshRSS ... are updated, which are not compatible with v8 at the moment for example, but that would be a bad idea if some security updates are required!
1. Check all php packages
You might need it. Copy the list.
pacman -Q | grep php
2. Backup your php.ini file
www.conf and other files if you have changed anything for php7.
cp /etc/php/php.ini .
3. Update your system
4. Restart system if necessary
5. Check all your applications
If everything runs. NICE, you're almost done! Just merge the pacnew files and
If not, keep going.
6. Install all your php7 packages
Check your list of position number 1 and add the 7 after php.
pacman -S php7 php7-fpm ...
7. Move php.ini (7) as pacnew file and copy your php.ini to the directory
mv /etc/php7/php.ini /etc/php7/php.ini.pacnew
cp php.ini /etc/php7/
8. Merge all pacnew files
Warning! (only php7)
Pay special attention to the php7 - php.ini file:
extension_dir = "/usr/lib/php/modules/" | extension_dir = "/usr/lib/php7/modules/"
9. Change the php socket path in nginx
If you have a php.conf file in your nginx directory, just copy it and rename it to php7.conf.
Change your pages/configuration files which aren't compatible with php8 to
included php7.conf; and change the path to php7 in your config file (see below).
10. Restart/start nginx and php7
systemctl enable php-fpm7.service && systemctl start php-fpm7.service && systemctl restart nginx.service