PHP is a full suite of tools for building dynamic websites
PHP is a reflective computer programming language originally designed for producing dynamic web pages.PHP is used mainly in server-side scripting, but can be used from a command line interface or in standalone graphical applications. Textual User Interfaces can also be created using ncurses. PHP is a recursive initialism for PHP: Hypertext Preprocessor.

Security Enhancements and Fixes in PHP 5.2.6:
Fixed possible stack buffer Overflow in the FastCGI SAPI identified by Andrei Nigmatulin.
Fixed integer overflow in printf() identified by Maksymilian Aciemowicz.
Fixed security issue detailed in CVE-2008-0599 identified by Ryan Permeh.
Fixed a safe_mode bypass in Curl identified by Maksymilian Arciemowicz.
Properly address incomplete multibyte Chars inside escapeshellcmd() identified by Stefan Esser.
Upgraded bundled PCRE to version 7.6 you can free download PHP 5.2.6 now.