NYCPHP Meetup

[Jon Baer]

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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