Im in the process of developing a fileserver platform for personal use and for the fun of it, powered by PHP5 and MySQL.

And so far i´ve built in Mime checks, and Size checks. and will use Salathe´s method to check the file extensions also.

For double security.

Would one check for something else ?

I was thinking about using some image functions to make sure "image.jpg" are in fact a image file.

/EyeDentify

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Of course the whole point of a doomsday machine, would have been lost if you keep it a secret.