PHP 5.2, PHP 5.3
Recommended Operating System
Linux Distrobutions: SuSe, Red Hat, Ubuntu
Complementary Software tools
MySQL, Apache Web Server, PostGres
Notes about PHP:
It can be tricky to install and configure on Windows Server editions 2003 and earlier.
Single-threaded, which may make it not the best solution in all cases.
The Terms "LAMP" and "WAMP" are often used to discribe the setup of PHP with Linux/Windows, Apache, and MYSQL
IIS requires some tenderness and care when configuring
The scripting language is easy to learn.
PHP 5.3+ have improved functions and security features