
Definition and Full Form:
PHP is a server-side scripting language. Father of php is Rasmus Lerdorf in 1994. PHP First name is Personal Home Page, but now its called as PHP: Hypertext Preprocessor.
What is server-side scripting language?
Server-side scripting language execute (run) on the server. server-side environment that runs a scripting language is a web server. A user's request is fulfilled by running a script directly on the web server to generate dynamic HTML pages. This HTML is then sent to the client browser. It is usually used to provide interactive web sites that interface to databases or other data stores on the server.
What You Mean By Hypertext Preprocessor ?
Hypertext Preprocessor (It is a recursive acronym, if you can understand what that means.) PHP is an HTML-embedded Web scripting language. This means PHP code can be inserted into the HTML of a Web page. When a PHP page is accessed, the PHP code is read or "parsed" by the server the page resides on. The output from the PHP functions on the page are typically returned as HTML code, which can be read by the browser. Because the PHP code is transformed into HTML before the page is loaded, users cannot view the PHP code on a page. This make PHP pages secure enough to access databases and other secure information.
PHP5
PHP 5 was released in July 2004 . It is mainly driven by its core, the Zend Engine 2.0 with a new object model and dozens of other new features. PHP-related and supporting projects, such as PEAR, PECL, and documentation, and an underlying network infrastructure of well over one-hundred individual web servers on six of the seven continents of the world.
Example Syntax.
<?phpOutput:Hello World
echo "Hello World";
?>