What Is PHP?

PHP is the Web development language written by and for Web developers. PHP stands for PHP: Hypertext Preprocessor.

PHP is a server-side scripting language, which can be embedded in HTML. PHP is the engine behind millions of dynamic web applications. Its broad feature set, approachable syntax, and support for different operating systems and web servers have made it an ideal language for both rapid web development and the methodical construction of complex systems.

What Is MySQL?

MySQL is an open source, SQL Relational Database Management System (RDBMS) that is free, open source database software. The MySQL database software is almost capable of doing every thing which is supported and done by every database now days. Its performance is as good as oracle and other modern database software.

Early in its history, MySQL occasionally faced opposition due to its lack of support for some core SQL constructs such as sub selects and foreign keys. Ultimately, however, MySQL found a broad, enthusiastic user base for its liberal licensing terms, perky performance, and ease of use.

• SQL in a Nutshell (oreilly.com)
• PHP – what it does and what it doesn’t (ghacks.net)