The application server is a complete package of Apache as a server, MySQL as the database and PHP as the language used for scripting. It is a local server that is used for website development by PHP. Unlike, LAMP, MAMP, and WAMP, this application server can be used for any of the operating systems.
XAMPP stands for x-operating system, Apache server, database MariaDB and PHP, Perl for writing scripts. It is platform friendly and can be used by any OS.
This is an open source, environment freely available to its users. Moreover, it provides support of mercury mail, perl, filezilla to its users. XAMPP can be installed over any operating systems, and it provides appropriate development environment.