How to install LEMP stack (nginx, MariaDB/MySQL and php) on CentOS

The LEMP stack is an increasingly popular web service stack, powering mission-critical web services in many production environments. As the name implies, the LEMP stack is composed of Linux, nginx, MariaDB/MySQL and PHP. nginx is a high performance and lightweight replacement of slow and hard-to-scale Apache HTTP server used in the traditional LAMP stack. MariaDB is a community-driven fork of MySQL, with more features and better performance.