php – swiching to correct php version

sudo update-alternatives --config php

This command will list the options in table format to choose from the current installed php versions on you linux operating system

There are 2 choices for the alternative php (providing /usr/bin/php).

  Selection    Path             Priority   Status
------------------------------------------------------------
  0            /usr/bin/php8.1   81        auto mode
* 1            /usr/bin/php8.0   80        manual mode
  2            /usr/bin/php8.1   81        manual mode

Where you see the * meaning it is currently being used as a default php version. in my case I have selected it manual to 8.0

You can choose the number from selection column and hit enter, the selected php version will be applied.

Press <enter> to keep the current choice[*], or type selection number: