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

Nick Halstead's Blog: 10 Reasons why PHP is still very much alive

Lukas Smith's Blog: Its the end of the world as we know it.

Stuart Herbert's Blog: Quick Tip: Get, Set and Query in One Method

Dave Marshall's Blog: Log memory usage using declare and ticks in PHP

PHPBuilder.com: Using XML - A PHP Developer\'s Primer (Part 3)


Community Events





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


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

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