What is php variable definition? Php variable defined part 2 php programs

Publié le: 16 juin 2019
sur la chaîne: Tech 2 up
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PHP

One of the points of using a server side language is that we can leave some aspects of the page to be generated on the fly. This frees us from having to manually keep various parts of the page up to date.

In the case with our about page, we have a simple configuration file, which holds the data, used by the page. This same resource is used for the generation of the vCard file and the JSON feed.

PHP code may be executed with a command line interface (CLI), embedded into HTMLcode, or it can be used in combination with various web template systems, web content management systems, and web frameworks. PHP code is usually processed by a PHP interpreter implemented as a module in a web server or as a Common Gateway Interface(CGI) executable. The web server combines the results of the interpreted and executed PHP code, which may be any type of data, including images, with the generated web page. PHP can be used for many programming tasks outside of the web context, such as standalone graphical applications[9] and robotic drone control[10].

The standard PHP interpreter, powered by the Zend Engine, is free software released under the PHP License. PHP has been widely ported and can be deployed on most web servers on almost every operating system and platform, free of charge.[11]

The PHP language evolved without a written formal specification or standard until 2014, with the original implementation acting as the de facto standard which other implementations aimed to follow. Since 2014, work has gone on to create a formal PHP specification.[12]


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