What Is LAMP? 

LAMP is an open source Web development platform that uses Linux as the operating system, Apache as the Web server, MySQL or MariaDB as the relational database management system and PHP as the object-oriented scripting language.
Sometimes Perl or Python is used instead of PHP.

Apache is the most widely used web server software. Developed and maintained by Apache Software Foundation, Apache is an open source software available for free. It runs on 67% of all webservers in the world. It is fast, reliable, and secure. It can be highly customized to meet the needs of many different environments by using extensions and modules.

MariaDB is a community-developed, commercially supported fork of the MySQL relational database management system, intended to remain free and open-source software under the GNU General Public License.

phpMyAdmin is a free and open source administration tool for MySQL and MariaDB. As a portable web application written primarily in PHP, it has become one of the most popular MySQL administration tools, especially for web hosting services.