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

PHPMaster.com: Extract Objects from an Access Database with PHP, Part 2

Zend Developer Zone: Dynamically Creating Compressed Zip Archives With PHP

Stoyan Stefanov: Server-side React with PHP part 2

O\'Reilly: Designing a database-driven PHP App? Don\'t Forget the Data!!

Brian Swan's Blog: SQL Server Driver for PHP Connection Options: Snapshot Isolation


Community Events





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


interview language install community release opinion introduction series unittest framework laravel zendserver podcast symfony api voicesoftheelephpant bugfix deployment library package

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