Re: Re: how to detect type of image

On 4/22/07, Myron Turner <turnermm02@shaw.ca> wrote:

Jonathan wrote: Alain Roger wrote:

Hi, In my web application, end user is able to load images (png, jpeg, gif,..) into database. I would like to know how can i detect automatically the type of image (pnd, jpeg,...) ? i do not want to check the extension because this is easily faked... just by renaming it. Does it exist a technique for that ? thanks a lot,

Is there anything wrong with just using $_FILES['upload_name']['type']? $_FILES['upload_name']['type'] appears to believe the extension. Try it--upload a file with a misleading extension. This same question was asked yesterday and the advice was to use

    string *mime_content_type* ( string filename)

That doesn't seem to get fooled very easily, though I suppose you could fool it if you went to the effort of, say, setting up a fake image header, when what you are sending is a time bomb. M.

Yeah right, a time bomb with an image header :P It should have an ELF header :) But then it would be detected by the mime_content_type i guess. Tijnema