(officially "PHP: Hypertext Preprocessor") is a server-side
HTML-embedded scripting language.
At the most basic
level, PHP can do anything any other CGI program can do, such as collect
form data, generate dynamic page content, or send and receive cookies.
strongest and most significant feature in PHP is its support for
a wide range of databases. Writing a database-enabled web page is
PHP also has
support for talking to other services using protocols such as IMAP,
SNMP, NNTP, POP3, HTTP and countless others. You can also open raw
network sockets and interact using other protocols.