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Bug #62681 mime_content_type gets wrong mime
Submitted: 2012-07-28 09:42 UTC Modified: 2021-08-16 12:57 UTC
Avg. Score:5.0 ± 0.0
Reproduced:1 of 2 (50.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: BenjaminBeck at gmx dot de Assigned: cmb (profile)
Status: Not a bug Package: Unknown/Other Function
PHP Version: 5.3.15 OS: ubuntu
Private report: No CVE-ID: None
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From: BenjaminBeck at gmx dot de
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 [2012-07-28 09:42 UTC] BenjaminBeck at gmx dot de
PHP function "mime_content_type" returns wrong mime type:
"application/octet-stream" instead of "image/jpeg" on a jpg image.
I checked the magic bytes (jpeg header) of the file with a hex editor and it 
looked fine to me.

the image is taken by a smartfone (HTC 7 Mozart T8698).

this is the image:

Test script:
$res = mime_content_type("7.jpg");

Expected result:

Actual result:


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 [2012-07-28 09:44 UTC] BenjaminBeck at gmx dot de
my system configuration which produced the bug is:
PHP 5.3.6-13ubuntu3.6 with Suhosin-Patch (cli) (built: Feb 11 2012 03:26:01) 
Copyright (c) 1997-2011 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2011 Zend Technologies
 [2012-07-28 14:14 UTC]
This is because your picture is not standard JPEG/JFIF but instead JPEG/EXIF. 
The command-line Linux 'file' program doesn't understand it either:

7:03am x220:~> file 7.jpeg
7.jpeg: Claris clip art?

You can get it using:


which produces: image/jpeg

But yes, we should support non-JFIF jpeg files as well here.
 [2012-07-28 14:14 UTC]
-Status: Open +Status: Analyzed
 [2018-04-03 13:09 UTC]
-Package: *Graphics related +Package: Unknown/Other Function
 [2021-08-16 12:57 UTC]
-Status: Analyzed +Status: Not a bug -Assigned To: +Assigned To: cmb
 [2021-08-16 12:57 UTC]
If this issue still persists, please report it upstream[1].

[1] <>
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