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

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: Creating a Simple Threaded Discussion Forum

PHPMaster.com: Create a Podcast Feed with PHP

Zend Developer Zone: PHP Built in Input filtering

NETTUTS.com: Run Your Own TinyURL Service With Phurl

HowTo Forge: Installing Lighttpd With PHP5 And MySQL Support On Fedora 7


Community Events











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


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

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