Prestashop is a web-based CMS e-commerce platform written mostly in PHP server-side programming language. In order to execute Prestashop PHP file scripts, a web server, such as Apache HTTP server, and a PHP processing gateway must be installed and operational on the server. In order to install Apache web server and the PHP interpreter alongside with all required PHP modules needed by Prestashop to run properly, issue the following command in your server console.
apt install apache2 libapache2-mod-php7.0 php7.0 php7.0-xml php7.0-gd
php7.0-jsonp7.0-zip php7.0-intl php7.0-mcrypt php7.0-curl php7.0-intl