News Feed
Sections




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

Sameer Borate's Blog:
Unpacking binary data in PHP
September 22, 2010 @ 10:45:52

Sameer Borate has a new post to his blog today talking about a method for unpacking binary data directly in PHP - specifically in working with images.

To set the stage we will start with a programming problem, this will keep the discussion anchored to a relevant context. The problem is this : We want to write a function that takes a image file as an argument and tells us whether the file is a GIF image; irrelevant with whatever the extension the file may have. We are not to use any GD library functions.

He shows how to use the unpack function to open up the file and pull out the raw data - including the header information that tells you what kind of file it is you're working with. There's also an example of unpacking the header contents and grabbing things like height, width and the aspect of the image.

0 comments voice your opinion now!
unpack binary data tutorial gif image


blog comments powered by Disqus

Similar Posts

DevShed: Handling Static Data with PHP 5

php|architect: Zend Framework - A Practical Tutorial

SoftDevTube.com: Write Flex and PHP Code Using Flash Builder

IBM developer Works: PHP and RSS: Getting it together

ThinkPHP Blog: Creating press-ready PDF documents on the fly including individual barcodes


Community Events





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


api configure library language threedevsandamaybe wordpress application podcast bugfix laravel developer project framework code interview community series list introduction release

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