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[Scott Mattocks]

Hello,

I am looking for a way to determine the mime type of an image that is 
held in memory and does not come from a file. All of the functions I can 
find only work on files. Does anyone know of a way to get the mime type 
from the image data? Here is a basic idea of what is happening:

function spitOutImage($imageToGet)
{
     if (cache::isCached($imageToGet)) {
         $image = cache::getImage($imageToGet);
     } else {
         $image = $this->createImage($imageToGet);
     }

     header('Content-type: ???');
     echo $image;
}

If createImage() is called, I can get the image type, but if the image 
is cached, I can't. The cached image just lives as data somewhere with 
no other information.

Thanks,
-- 
Scott Mattocks
http://www.crisscott.com