install additional php 5.6 on debian code example

Example 1: install php debian 10

sudo apt -y install php-cli php-fpm php-json php-pdo php-mysql php-zip php-gd  php-mbstring php-curl php-xml php-pear php-bcmath

Example 2: fore install debian 10 php 7.3

sudo apt install -y php7.4 php7.4-cli php7.4-common

Example 3: install php debian 10

sudo apt -y install libapache2-mod-php