Takes a hex colour in standard HTML format and returns a three element array in which each element is the decimal R, G, or B value which can then be used, for instance, in GD
funcitons
If you have a message board which allows people to post inline images with the IMG tag, you can use this function to run a few checks on the remote image. Simply pass it the URI
to the image, and it checks the file exits; that it is a recognised image format; and that it is smaller than a predeterminted size. This stops mischief-makers linkng your page
to a 4TB file.
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