PHP Image Resize

Resources for resizing images using PHP.

PHP Manual on Image Functions
http://uk2.php.net/manual/en/ref.image.php
Explains the various image functions within PHP.

Pear Image Transform with PHP
http://pear.php.net/package/Image_Transform

ImageMagick
http://www.imagemagick.org/script/index.php
A software suite to create, edit, and compose bitmap images. It can read, convert and write images in a large variety of formats. Images can be cropped, colors can be changed, various effects can be applied, images can be rotated and combined, and text, lines, polygons, ellipses and Bézier curves can be added to images and stretched and rotated. Most of the functionality of ImageMagick can be used interactively from the command line; more often, however, the features are used from programs written in the programming languages C, Ch, C++, Java, Lisp, Pascal, Perl, PHP, Python, Ruby, Tcl/Tk, for which ready-made ImageMagick interfaces (MagickCore, MagickWand, PerlMagick, Magick++, PythonMagick, MagickWand for PHP, RMagick, TclMagick, L_Magick, and JMagick) are available. This makes it possible to modify or create images automatically and dynamically.

a4uforum post on PHP image resize
http://www.a4uforum.co.uk/showthread.php?t=47248