PHP

PHP

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This article is about the scripting language. For other uses, see PHP
(disambiguation).

Paradigm imperative, object-oriented, Procedural, reflective

Appeared in 1995 (1995)[1]

Designed by Rasmus Lerdorf

Developer The PHP Group

Stable release 5.3.3 (July 22, 2010; 55 days ago (2010-07-22))

Typing discipline Dynamic, weak

Major implementations Zend Engine, Roadsend PHP, Phalanger, Quercus, Project
Zero, HipHop

Influenced by C, Perl, Java, C++, Tcl[1]

Influenced PHP4Delphi

Programming language C

OS Cross-platform

License PHP License

Usual file extensions .php, .phtml .php5 .phps

Website www.php.net

PHP Programming at Wikibooks

PHP: Hypertext Preprocessor is a widely used, general-purpose
scripting language that was originally designed for web development to
produce dynamic web pages. For this purpose, PHP code is embedded into
the HTML source document and interpreted by a web server with a PHP processor
module, which generates the web page document. As a general-purpose programming
language, PHP code is processed by an interpreter application in command-line
mode performing desired operating system operations and producing program
output on its standard output channel. It may also function as a graphical
application. PHP is available as a processor for most modern web servers
and as a standalone interpreter on most operating systems and computing
platforms.

PHP was originally created by Rasmus Lerdorf in
1995[1][2] and has been in continuous development ever since. The main
implementation of PHP is now produced by the PHP Group and serves as the
de facto standard for PHP as there is no formal specification.[3] PHP
is free software released under the PHP License.

As the Internet has grown
into the competitive market that it is today it has become an essential
way of increasing revenue and generating commercial success online. This
commercial success is best achieved through the process of search engine
optimization however the use of SEO should include the latest ethical
techniques, which is known as white hat SEO. This white hat SEO produces
results that last a long time. It is about creating content for users
not search engines. In many ways SEO is similar to web development that
promotes accessibility and it is not just about following guidelines.
As with all things white hat SEO has an opposite, known as black hat SEO.
Black hat SEO attempts to improve rankings in ways that are disapproved
of by search engines. Search engines may penalise sites they discover
using black hat methods, either by reducing their rankings or eliminating
their listings from their databases altogether. Such penalties can be
applied either automatically by the search engines’ algorithms, or by
a manual site review.

Search engine optimization is about more than fixing Meta information
and writing content it’s about research and analysis. You need to know
what a website should display and then apply this to the site to give
it the best possible chance of succeeding within the search engine results.

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