News Feed
Jobs Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Paul Gregg's Blog:
PHP algorithms Determining if an IP is within a specific range.
April 28, 2009 @ 09:25:39

Paul Gregg has shared a method he's come up with to determine if a given IP is within a selected range.

Unfortunately although people usually understand that an IP address is simply an unsigned 32 bit integer, and is easily determined, usually with $_SERVER['REMOTE_ADDR'], where the real challenge is - is in specifying the range within which they wish to check that IP address. IP ranges are usually specified in three common ways (in increasing complexity): wildcard, start-end range, classless inter-domain routing.

He looks at each method and includes descriptions and code examples as well as a link to the source code and a live demo of it in action.

0 comments voice your opinion now!
algorithms ip address specific range three method wildcard cidr startend


blog comments powered by Disqus

Similar Posts

Tim Koschuetzki's Blog: Composing Methods: Substitute Algorithmn

BarelyFitz.com: CSS Colors - Take Control Using PHP

Jose da Silva's Blog: Revisiting PHP 5.3 __invoke magic method

Benjamin Eberlei: Doctrine and SOLID

Bob Majdak: On SQL in PHP


Community Events











Don't see your event here?
Let us know!


facebook framework language podcast symfony2 hack composer security series performance unittest opinion application release package component hhvm install introduction database

All content copyright, 2014 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework