PHP

A cross platform, powerful and entirely free server-side scri`pting language. Supports many databases (ODBC, as well as many native interfaces such as MySQL and MS-SQL) as well as many APIs and protocols (LDAP, IMAP, COM, Java, SNMP, arbitary precision math, GD, zlib and more). Supports ISAPI (IIS) and ApacheNT under Windows, as well as Apache and other servers under UNIX. Full source code
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.