How to resolve command php not found after installation in ubuntu 21.04?

Question

I want to install specific version of php for that i write this command sudo apt-get install php7.2 it's showing like this

Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Note, selecting 'php7.2-common' for regex 'php7.2'
Note, selecting 'php7.2-sodium' for regex 'php7.2'
Note, selecting 'libapache2-mod-php7.2' for regex 'php7.2'
Note, selecting 'php7.2-thrift' for regex 'php7.2'
0 upgraded, 0 newly installed, 0 to remove and 235 not upgraded.

after this when i want to know the version of php , i run php -v i am getting following error

Command 'php' not found, but can be installed with: sudo apt install php7.4-cli # version 7.4.16-1ubuntu2.1, or sudo apt install php-cli # version 2:7.4+76ubuntu1

Answer 1

Try these steps:

1: Add Ondrej's PPA, which contains the PHP 7.2 package:

sudo add-apt-repository ppa:ondrej/php

2: Update:

sudo apt update

3: Install PHP 7.2

sudo apt install php7.2

4: Select the standard version of PHP

sudo update-alternatives --set php /usr/bin/php7.2

5: Restart Apache2:

sudo systemctl restart apache2

Answer 2

Run the following commands it will work

sudo apt update
sudo apt upgrade

sudo apt install ca-certificates apt-transport-https

wget -q https://packages.sury.org/php/apt.gpg -- I sudo apt-key add echo "deb https://packages.sury.org/php/stretch

main" | sudo tee /etc/apt/sources.list.d/php.list 
sudo apt update

sudo apt install php7.2