ImageMagick is an external program that can be called from php and in the following pages you can find some
examples, tips and tricks on how to use it with php.
There are APIs to use ImageMagick but I tend to use the php exec() function along with the command line method
as I find it gives more flexability.
I have also included a few examples of the GD library that is built into php and one of the php APIs called Imagick
which is also built into the later versions of php.
Do not confuse Imagick with ImageMagick !