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## Before you start
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- This tutorial was developed for and tested with DietPi 7.2 on a RaspberryPI.
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- This tutorial only works if you use "Lighttpd" as webserver.
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Run `dietpi-software` and check the setting for "Webserver Preference".
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- DietPi may behave differently on other systems.
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- Nextcloud 21 is required _before_ upgrading to PHP 8.0.
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- This does not work for DietPi Docker. You can't upgrade PHP in a Docker image.
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- _Make sure to make a backup of your entire DietPi Instance (config, data, etc.) before you do this._
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## Log in as Root
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If you're using SSH, log in with `ssh root@<your dietpi ip>`.
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If you're directly on the device, use `sudo su`
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## Add PHP Package Archive
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Execute the following commands on your DietPi to add the repository PHP 8.0 from [deb.sury.org](https://deb.sury.org/#php-packages):
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```bash
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# Add the PHP PPA from deb.sury.org
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apt-get -y install apt-transport-https lsb-release ca-certificates curl
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curl -sSL -o /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
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sh -c 'echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list'
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apt-get update
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```
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## Install PHP 8.0
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Execute the following command on your DietPi to install PHP 8.0:
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```bash
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# Install PHP 8.0
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apt-get -y install php8.0-fpm php8.0-apcu php8.0-mysql php8.0-xml php8.0-zip php8.0-mbstring php8.0-gd php8.0-curl php8.0-redis php8.0-intl php8.0-bcmath php8.0-gmp php8.0-imagick imagemagick
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```
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## Update the PHP 8.0 configuration
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Execute the following command on your DietPi to link the DietPi configuration for PHP from PHP 7.3 to 8.0 and enable it:
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```bash
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# Symlink NCP PHP configuration
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ln -s /etc/php/7.3/mods-available/dietpi-nextcloud.ini /etc/php/8.0/mods-available/dietpi-nextcloud.ini
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ln -s /etc/php/7.3/mods-available/dietpi.ini /etc/php/8.0/mods-available/dietpi.ini
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phpenmod dietpi
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phpenmod dietpi-nextcloud
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```
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Now you need to edit the configuration of PHP FPM.
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Run the command `nano /etc/php/8.0/fpm/php.ini` to open a text editor with the config file.
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Find the line `;cgi.fix_pathinfo=1` and remove the `;` at the beginning so that the line reads `cgi.fix_pathinfo=1`.
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You can use `CTRL` + `w` to search in the file,
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with `CRTL` + `o` you can save the changed file and
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with `CRTL` + `x` you can close the editor.
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## Set up lighttpd for PHP 8.0
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Now you need to edit the configuration for lighttpd to instruct it to use PHP 8.0
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Run `nano /etc/lighttpd/conf-available/15-fastcgi-php.conf` to open the configuration file.
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It should have this section:
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```
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fastcgi.server += ( ".php" =>
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((
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"socket" => "/run/php/php7.3-fpm.sock",
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"broken-scriptfilename" => "enable"
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))
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)
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```
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You need to change the "socket" from "/run/php/php7.3-fpm.sock" to "/run/php/php8.0-fpm.sock".
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The section should now read like this:
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```
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fastcgi.server += ( ".php" =>
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((
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"socket" => "/run/php/php8.0-fpm.sock",
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"broken-scriptfilename" => "enable"
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))
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)
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```
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Save the file and then run the following command to restart lighttpd:
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```bash
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service lighttpd force-reload
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```
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## Check the PHP default version
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By default, your DietPi should now be using PHP 8.0.
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You can check this by running `php -v`. The output should look like this:
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```bash
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root@DietPi:/home/pi# php -v
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PHP 8.0.3 (cli) (built: Mar 5 2021 08:38:30) ( NTS )
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Copyright (c) The PHP Group
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Zend Engine v4.0.3, Copyright (c) Zend Technologies
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with Zend OPcache v8.0.3, Copyright (c), by Zend Technologies
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```
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If it doesn't, you should use `update-alternatives --config php` and set PHP 8.0 as default:
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```bash
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root@DietPi:/home/pi# update-alternatives --config php
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There are 2 choices for the alternative php (providing /usr/bin/php).
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Selection Path Priority Status
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------------------------------------------------------------
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* 0 /usr/bin/php8.0 80 auto mode
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1 /usr/bin/php7.3 73 manual mode
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2 /usr/bin/php7.4 74 manual mode
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3 /usr/bin/php8.0 80 manual mode
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Press <enter> to keep the current choice[*], or type selection number:0
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```
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## Notes
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- It can take a day before app updates show up in the apps store |
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\ No newline at end of file |