# Verify PHP
php --version
# Output
PHP 8.0.13 (cli) (built: Nov 22 2021 09:50:43) ( NTS )
Copyright (c) The PHP Group
Zend Engine v4.0.13, Copyright (c) Zend Technologies
with Zend OPcache v8.0.13, Copyright (c), by Zend Technologies
# Switch PHP
sudo update-alternatives --config php
# Output
There are 2 choices for the alternative php (providing /usr/bin/php).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/bin/php8.0 80 auto mode
1 /usr/bin/php7.0 70 manual mode
* 2 /usr/bin/php8.0 80 manual mode
Press <enter> to keep the current choice[*], or type selection number: 1
update-alternatives: using /usr/bin/php7.0 to provide /usr/bin/php (php) in manual mode
# Switch
sudo update-alternatives --config phar
# Output
There are 2 choices for the alternative phar (providing /usr/bin/phar).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/bin/phar8.0 80 auto mode
1 /usr/bin/phar7.0 70 manual mode
* 2 /usr/bin/phar8.0 80 manual mode
Press <enter> to keep the current choice[*], or type selection number: 1
update-alternatives: using /usr/bin/phar7.0 to provide /usr/bin/phar (phar) in manual mode
# Switch
sudo update-alternatives --config phar.phar
# Output
There are 2 choices for the alternative phar.phar (providing /usr/bin/phar.phar).
Selection Path Priority Status
------------------------------------------------------------
0 /usr/bin/phar.phar8.0 80 auto mode
1 /usr/bin/phar.phar7.0 70 manual mode
* 2 /usr/bin/phar.phar8.0 80 manual mode
Press <enter> to keep the current choice[*], or type selection number: 1
update-alternatives: using /usr/bin/phar.phar7.0 to provide /usr/bin/phar.phar (phar.phar) in manual mode