Switch php versions on commandline ubuntu

How to switch php version in ubuntu

# Install PHP & check version 

apt install software-properties-common
add-apt-repository ppa:ondrej/apache2
apt update -y
apt upgrade -y

# For php7.3 (use any)
apt install -y php7.3
apt install libapache2-mod-php7.3 php7.3 unzip php7.3-xml php7.3-mysql php7.3-imap php7.3-zip php7.3-intl php7.3-curl ntp -y

# For php7.4 (use any)
apt install -y php7.4
apt install php7.4-{cli,fpm,json,common,mysql,zip,gd,mbstring,curl,xml,bcmath,imap,intl}
systemctl status php7.4-fpm

php --version
which php
whereis php

nano /etc/php/7.4/apache2/php.ini

# Find this lines by ctrl+w and change same as below:

file_uploads = On
allow_url_fopen = On
short_open_tag = On
memory_limit = 1024M
upload_max_filesize = 1024M
max_execution_time = 3600
date.timezone = UTC+6

ctrl+s and ctrl+x

apt update -y
apt upgrade -y


# SWITCH PHP VERSION
update-alternatives --config php

# Choose the appropriate version

  Selection    Path             Priority   Status
------------------------------------------------------------
* 0            /usr/bin/php7.4   74        auto mode
  1            /usr/bin/php7.3   73        manual mode
  2            /usr/bin/php7.4   74        manual mode