Comments on: Smart File Type Detection Using PHP

By: Radiation

Radiation — Mon, 19 Sep 2011 13:43:05 +0000

Bah! Don’t use getimagesize() to validate images! It is very easy to get php code through getimagesize(). The best way to ensure that images are safe is to place them in a directory that doesn’t have executable permissions. And don’t ever! include() them.

By: 荒野无灯

荒野无灯 — Mon, 01 Aug 2011 11:56:02 +0000

GOOD article ,I’ve translated it on my blog:http://ihacklog.com/?p=4693

By: Jump

Jump — Fri, 10 Jun 2011 16:18:11 +0000

Love the OOP way of finding the mime, never used that before. Cheers!

By: Dejan

Dejan — Mon, 30 May 2011 17:30:38 +0000

Nice tutorial.
I wonder, if possible, to post the code regarding magic bytes for mp3, since I’m facing the same problem.
I can see from one of the links in your post that the magic number for mp3 is ’49 44 33′, but still want to know if this is a reliable way to get the mime type.

Regards

By: Destrey

Destrey — Sun, 22 May 2011 09:22:01 +0000

That’s 2 cveler by half and 2×2 clever 4 me. Thanks!

By: milly

milly — Mon, 13 Dec 2010 20:18:13 +0000

Thank you SO much for this. I’ve been messing with mime_content_type() and a bunch of other finicky methods, but this worked perfectly. Just what I needed.

By: aris

aris — Wed, 01 Dec 2010 06:44:45 +0000

same problem with brandon.
Where can we find this fininfo class and include it?

By: brandon

brandon — Wed, 10 Nov 2010 01:15:51 +0000

failed:

file_info = new finfo(FILEINFO_MIME); // object oriented approach!
$mime_type = $file_info->buffer(file_get_contents($file));

yeilds:

Fatal error: Class ‘finfo’ not found

By: Pointer Men's Basketball

Pointer Men's Basketball — Sat, 30 Oct 2010 07:16:20 +0000

You you should change the page name Smart File Type Detection Using PHP | Design Shack to more better for your content you write. I loved the the writing all the same.

By: Alejandro

Alejandro — Tue, 25 May 2010 08:19:04 +0000

mime_type returns

“application/pdf; charset=binary”

so the comparison won’t work.

how can I fix this?

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By: Itay

Itay — Sun, 22 Nov 2009 16:31:08 +0000

Great post, just what I was looking for regarding file types.

Thanks.

By: Kishore Nallan

Kishore Nallan — Sat, 21 Mar 2009 13:19:19 +0000

@Alex: Thanks for that, typo fixed!

By: Alex

Alex — Tue, 10 Mar 2009 14:30:51 +0000

Not sure if this is typo or not (not the most knowledgeable w/ PHP), but…

$tmpFile = $_FILES['myFile']['tmp_name']; // path of the temp file created by PHP during upload
$imginfo_array = getimagesize($tempFile); // returns a false if not a valid image file

getimagesize uses “tempFile” as its argument, while “tmpFile” was initialized above. Shouldn’t getimagesize use “tmpFile”?

By: Developer

Developer — Mon, 02 Mar 2009 05:59:39 +0000

Really nice article..
It shows the depth of the knowledge..

Thanks a lot