The beginning of the jpeg file in hex looks like this: FF D8 FF perhaps you could test for that occurrence. Be aware that the occurrence of FF D8 FF must be in each jpg file -- it does not mean that the occurrence of FF D8 FF is found only in a jpg file. http://filext.com/detaillist.php?extdetail=JPG you could also try http://www.jpeg.org/index.html Mark Cain ----- Original Message ----- From: "mel list_php" <list_php@xxxxxxxxxxxxx> To: <php-db@xxxxxxxxxxxxx> Sent: Wednesday, April 27, 2005 4:03 AM Subject: FW: mime-type related to extension? > Hi I sent this on 21st of april and got no answer... > there is no way to check the "real" mime type of a file? > even a file without extension? > thanks, > melanie > > > >From: "mel list_php" <list_php@xxxxxxxxxxxxx> > >To: php-db@xxxxxxxxxxxxx > >Subject: mime-type related to extension? > >Date: Thu, 21 Apr 2005 13:45:45 +0000 > > > >Hi guys! > > > >I have a basic form to upload files, my problem is about the mime type. > >I use $type= $_FILES[$file_uploaded]['type']; to check the mime-type of the > >fila as I want to allow only .jpeg. > >I have then a test like: > >if ($type=="image/pjpeg" || $type=="image/jpeg") > >{ > >... > >} > > > >Upload working fine if I send "red.jpg". > >However if I rename the file in "red", php recognizes it as > >application/octet-stream and not jpeg. > >I'm working under linux and for me the extension is not required for a > >file, I thought the mime-type was encoded in the file itself and was > >independent of the extension. > >Any clue on that? > >Any other php function I should look at? > >The cookbook and pear both use $_FILES[ ] ['type'] so I have no idea here. > > > >Thanks, > >Melanie > > > >_________________________________________________________________ > >It's fast, it's easy and it's free. Get MSN Messenger today! > >http://www.msn.co.uk/messenger > > > >-- > >PHP Database Mailing List (http://www.php.net/) > >To unsubscribe, visit: http://www.php.net/unsub.php > > > > _________________________________________________________________ > Want to block unwanted pop-ups? Download the free MSN Toolbar now! > http://toolbar.msn.co.uk/ > > -- > PHP Database Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
