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

Label Media Blog: Design Patterns in PHP - Factory method

Brandon Savage's Blog: A Lesson In Static Methods And Late Static Binding

Davey Shafik\'s Blog: php|tek Day 3

Federico Cargnelutti's Blog: Implementing Dynamic Finders and Parsing Method Expressions

Stefan Mischook's Blog: How to call functions from another class


Community Events











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


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

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