Install PHP 5.6 on Linux Mint

sudo apt-get install python-software-properties
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get install -y php5.6

Install PHP 7.3 on Linux Mint

sudo apt-get install python-software-properties
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get install -y php7.3

 

Switch Between PHP Version’s

From PHP 5.6 => PHP 7.3

Apache:

sudo a2dismod php5.6
sudo a2enmod php7.3
sudo service apache2 restart

CLI:

sudo update-alternatives --set php /usr/bin/php7.3
sudo update-alternatives --set phpize /usr/bin/phpize7.3
sudo update-alternatives --set php-config /usr/bin/php-config7.3

 

From PHP 7.3 => PHP 5.6

Apache:

sudo a2dismod php7.3
sudo a2enmod php5.6
sudo service apache2 restart

CLI:

sudo update-alternatives --set php /usr/bin/php5.6
sudo update-alternatives --set phpize /usr/bin/phpize5.6
sudo update-alternatives --set php-config /usr/bin/php-config5.6

 

Vlastimil Pošmura, 2019