Haifa linux club:PHP lecture
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GD - creating / manipulating images

With GD we can :
* Create new images .
* Load existing images and manipulate them.
* save images to disk as jpeg or png.
(gif supported only in old GD versions
- don't use unless you have to)
* resize images
* draw shapes , lines , pixels
* we can create a php file that returns
a graphical content type