Update:

apt-get update
apt-get install python-software-properties
apt-get install software-properties-common
apt-get update

Install Zip/Unzip:

apt-get install zip unzip

Add PHP5 package sources to your system:

add-apt-repository ppa:ondrej/php

If you get error here about Python Unicode, then it’s a problem of locale language set in your local machine. To fix you need to update locale and set, follow these steps:

locale-gen en_US.UTF-8
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8

Update:

apt-get update

Install PHP5.6:

apt-get install php7.2

Install other Laravel dependencies:

apt-get install php7.2-curl php7.2-mysql
apt-get install libapache2-mod-php7.2 php7.2-mbstring php7.2-xml php7.2-opcache php7.2-gd php7.2-zip

Check the newly installed PHP version:

php -v