08-17-2017, 12:39 AM
[attachment=4471]
PHP An Introduction
Given by:
hari prasad varma.d
abstract:-
PHP (PHP: Hypertext Preprocessor) was created by Rasmus Lerdorf in 1994. It was initially developed for HTTP usage logging and server-side form generation in Unix. Officially called "Personal Home Page Tools (PHP Tools)". This is the first use of the name "PHP".
PHP 2 (1995) transformed the language into a Server-side embedded scripting language. Added database support, file uploads, variables, arrays, recursive functions, conditionals, iteration, regular expressions, etc.Considered by its creator as the "fastest and simplest tool" for creating dynamic web pages .
PHP 3 (1998) added support for ODBC data sources, multiple platform support, email protocols (SNMP,IMAP), and new parser written by Zeev Suraski and Andi Gutmans. Development moves from one person to multiple developers
PHP 4 (2000) became an independent component of the web server for added efficiency. Added more advanced two-stage parse/execute tag-parsing system called the Zend engine. . Many security features were added.
PHP 4.1-4.3 (2001-02) Introduced the superglobals ($_GET, $_SESSION, etc.) , Disabled register_globals by default
PHP 5 (2004) adds Zend Engine II with object oriented programming, robust XML support using the libxml2 library, SOAP extension for interoperability with Web Services, SQLite has been bundled with PHP
PHP 5.2.4 (2007) Enabled the filter extension by default released on 30 August 2007. It is considered to be free software by the Free Software Foundation.