News Feed
Sections




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

DeveloperTutorials.com:
Floating Point Comparisons In PHP and Javascript
January 08, 2008 @ 07:57:00

On the DeveloperTutorials website, there's a new tutorial posted that warns against the perils of floating point comparisons between PHP and Javascript.

The problem is if you've done any calculations to arrive at these numbers they might actually be stored as 71.00000000001. Now if one of them is stored that way and the other isn't and you compare the two to see if they are equal you'll get a FALSE as the response, even though they should be the same. This isn't a bug, it's how floating point comparisons are designed to work.

In order to help combat this, he's provided two functions - one in PHP and one in Javascript - that compare the numbers in a more "sane" way that someone using them to store, say, currency values might want to use to compare them.

0 comments voice your opinion now!
flaoting point number compare javascript tutorial flaoting point number compare javascript tutorial


blog comments powered by Disqus

Similar Posts

php|architect: Stored Procedure Programming for MySQL5 (Part 1)

SOS Brigade Blog: Forcing Cache on Joomla Modules

Ibuildings techPortal: lessphp: PHP implementation of Less CSS

DevShed: Updating and Deleting Database Records with the Active Record Pattern

WebReference.com: Creating a Custom RSS Feed with PHP and MySQL


Community Events





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


refactor framework language laravel configure community developer wordpress install unittest release list code podcast interview testing threedevsandamaybe opinion introduction series

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