PHP, which stands for "Hypertext Preprocessor", is a server-side, HTML embedded scripting language used to make dynamic Web pages. Much of its syntax is borrowed from C, Java and Perl with some exclusive features thrown in. The goal of the language is to permit Web developers to write dynamically generated pages rapidly.
In addition to manipulating the content of your pages, PHP can also send HTTP headers. You can set cookies, manage authentication, and redirect users. It offers brilliant connectivity to several databases, and integration with various external libraries that let you do everything from generating PDF documents to parsing XML.
PHP is an open-source language, used mostly for dynamic web content and server-side applications. It is often pointed to as the main competitor with:
- Microsoft's C# - Visual Basic.NET - ASP family,
- Sun's Java - JSP
- Macromedia's ColdFusion
- CGI - Perl
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