What about mime_content_type()... see what that returns.

Nate

-----Original Message-----
From: Karthik [mailto:[EMAIL PROTECTED] 
Sent: Monday, November 08, 2004 12:35 AM
To: [EMAIL PROTECTED]
Subject: [PHP] Detecting image types for uploaded images

Hi,

  How do I differentiate between progressive and standard jpegs for
files "already" on the server ? getimagesize does return a mime type,
but doesn't seem to differentiate between image/jpeg and image/pjpeg
and returns image/jpeg for all jpeg images.

Any ideas?
Thanks
-K

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