Linux Debian 9 how to update php version/library

[Tbol]

Hey right now my php version is 7.0.33 and would like to update it up to 7.3.26 dont want to update more because im still using myacc 7.9.0 that old version if im not wrong and on windows my xampp running on 7.3.26 php version so it means everything should still work after update. Why i need? I want to install IPS forum and dou to my old php version i get error 500.

 

[Perun]

just look at yt/google:

debian how to upgrade php version 7.0 to 7.3

 

[Tbol]

Tried. Half of the stuff in tutorials doesnt install

Step 1. sudo apt update
sudo apt install software-properties-common
sudo add-apt-repository ppandrej/php

Step 2. sudo apt update

Step 3. sudo apt install php7.3 php7.3-common php7.3-cli

Step 4. sudo apt install php7.3-mysql

Step 5. sudo update-alternatives --set php /usr/bin/php7.3

Step 6. sudo systemctl restart apache2
sudo systemctl restart nginx