PHP

switch between php version ubuntu nginx

sudo update-alternatives --config php

switch between php version ubuntu nginx

sudo service nginx restart
sudo service php7.1-fpm or php7.2-fpm  restart

switch between php version ubuntu

  alias setphp="sudo update-alternatives --config php;sudo update-alternatives --config phar; update-alternatives --config phar.phar; a2dismod php*.*;systemctl restart apache2"

  Put the above alias in the

  sudo nano ~/.bashrc
  
  #After the above command just run this command
  
  a2enmod php<Your Desired Version> # like, a2enmod php7.4
  
  Now you can run command "setphp" from your terminal.