PHP script for resizing images the smart way

One of the challenges that comes with maintaining a graphic-intensive website like Shifting Pixel is finding a way to get high quality images throughout the site with as little effort as possible. To tackle this, I developed the Smart Image Resizer and have been using it around the site for the past few months. I couldn’t be happier.

The major advantage of this script is that it allows me to resize and crop any image on my website without touching the actual image or writing any code. I upload each image once at a high enough resolution and can then reuse it at any size I want, anywhere I want. It doesn’t matter if the images are in a post, on a page, or in a template file–it just works. All of the magic is done through the query string part of the URL in the src attribute of the img tag.

And, if this wasn’t a big enough time-saver for me right now, it’ll be a huge time-saver the next time I decide to redesign my site. It’s a relief that I won’t have to go through to resize and re-upload a thousand photos to make sure they look right–I’ll just have to change the links to them and I’ll be all set.

Features
Resizes JPEGs, GIFs, and PNGs
Intelligently sharpens for crisp photos at any size
Can crop based on width:height ratios
Can color-fill transparent GIFs and PNGs
Built-in caching keeps image variations for optimal performance

Requirements
PHP
GD

Download that great tool here:
http://shiftingpixel.com/2008/03/03/smart-image-resizer/
http://shiftingpixel.com/downloads/image-1.3.2.zip