PHP is a very popular programming language that was designed from the ground up to be used for the web. It is open source so anybody can download it and use it for free and if they have the know-how improve it.

The strength of PHP comes from its ability to be used in many different environments from windows, Mac OS and linux. It also has support for lots of different databases and in this article we cover the different databases and what they are.

dBase - dBase was the first widely used database management system for microcomputers. It was originally available on CP/M, Apple II, Apple Macintosh, Unix, IBM PC.

Informix - Informix is a relational database management system from IBM. It is in fact a family of products that offers different editions according to your needs. You can have a developer edition, enterprise edition, express edition etc.

Ingres - Ingres is a relational database management system that is open source but commercially supported. It is designed for government applications and in large commercial environments.

Microsoft SQL Server - As you've probably guessed from the name this database is offered by Microsoft. It is an enterprise level sql server and it is very popular.

mSQL - Although not open source itself mSQL or Mini SQL was very popular in its early days for open source applications as it is lightweight. Its popularity declined and MySQL has taken its place.

MySQL - MySQL is a very popular RDBMS that is open source and used on millions of websites. It is easy to use and very fast.

Oracle - Oracle is a powerful RDBMS that is offered by the Oracle Corporation which was started by Larry Ellison and a couple of his friends.

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