News 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

NetTuts.com: Refactoring Legacy Code: Part 6 - Attacking Complex Methods

Developer Tutorials Blog: PHP array_walk(): Run an array through a function

DevShed: Introducing Static Members and Methods in PHP 5 (Part 1)

Andrew Podner: Rock On, Refactor, or Re-roll?

Packt Publishing: PHP Magic Features


Community Events





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


interview release series conference introduction api configure unittest composer list voicesoftheelephpant community language laravel tool version opinion podcast framework symfony

All content copyright, 2015 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework