How to upgrade form PHP virsion 7.x to a higher one?

Question

Using phpinfo(), I have found that the installed version of PHP is 7.0.26. I want to upgrade it to PHP 7.2.

Answer 1

You have to install the PHP 7.2 (or any higher version 7.x) and remove your old version if you don't need it any more.

First add the PPA ppa:ondrej/php, run:

sudo add-apt-repository ppa:ondrej/php
sudo apt update

Second install the version you need 7.2 in your case, run:

sudo apt install php7.2

Third if you want to remove your old existing version, run

sudo apt remove php7.0