Looking for a php imaging library

Does anyone know of a good php imaging library? I need the following functions.

Ability to add text to an image
Ability to add an image to another image
Ability to save as a jpeg

I am looking for a library that is easy to use and produces nice looking results.

ty

I created some of my own functions to handle necessary tasks like this.
using Image Processing (ImageMagick)
You might be interested in taking a look at these two:

Imagick::annotateImage — Annotates an image with text
Imagick::appendImages — Append a set of images

phpthumb
google it

Please have a look into imagick
pecl install imagick
extension=imagick.so in php.ini