What you're really looking for the is the 'magic' of the bin file.
http://en.wikipedia.org/wiki/Magic_number_%28programming%29
There is a PECL extension for diving into libmagic ...
http://pecl.php.net/package/Fileinfo
- Jon
On May 10, 2007, at 8:35 PM, David Krings wrote:
Hi!
When one gets a file via upload information about the file is in
$_FILE and with that also the MIME type (although one cannot rely
on that).
Is there anything like this that works on local files as well? In
particular, I want to figure out if a file is really an image file
and not just some junk file that happens to have a .jpg, .tif, etc
file extension.
I thought about going by the exif header, but some image files
don't have that, but are still valid, web supported image files.
Am I pushing my luck here?
David
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