MIME Type detection function

[Shahar Evron]

Hi,

I was going to write a general purpose mime-type detection method. Right
now I use mime_magic to detect uploaded file's MIME type in
Zend_Http_Client but mime_magic is deprecated in favor of the fileinfo
extension.

Since both might or might not be available, and fileinfo is prefered, I
was going to write a wrapper function that would use fileinfo if
available, then mime_magic and if none are available, will do nothing.

I figure that this might be useful for other ZF components, and also for
users, and the most natural place for it is some static method of
Zend_Mime.

Any thoughts or better suggestions?

Shahar.

[Matthew Ratzloff]

Hi Shahar,
I once wrote a (now archived) proposal called Zend_Mime_Magic. It provided
native magic format parsing and was based on libmagic's uncompiled magic
format--the format that fileinfo also uses. I had actually resumed work on
it recently but stopped again when the authors of libmagic switched
exclusively to a compiled format that is incompatible with my code.
Incidentally, this breaks fileinfo as well, but that's easier to fix since
it's a simple wrapper around libmagic.

Still not sure how I want to proceed with that. The libmagic format has the
advantage of being on most systems either from the start or easily through
an apt-get or yum install (sudo apt-get install file). Gnome and KDE use a
unified format called Shared MIME-info Database, but it's largely extension
based, so that's not acceptable. Apache's mod_mime_magic magic.mime file
descends from an older version of libmagic and is too simplistic. If I want
to continue with the proposal I'll probably have to rewrite the parser for
the compiled format.

Anyway, all that said, I think a static method in Zend_Mime wouldn't hurt.
Zend_Mime::getMimeType($filename) could always be modified in the future to
use Zend_Mime_Magic if or when it is finished.

-Matt

You should not ever use ext/mime_magic. It is awful and highly inaccurate.

Post by Shahar Evron
Hi,
I was going to write a general purpose mime-type detection method. Right
now I use mime_magic to detect uploaded file's MIME type in
Zend_Http_Client but mime_magic is deprecated in favor of the fileinfo
extension.
Since both might or might not be available, and fileinfo is prefered, I
was going to write a wrapper function that would use fileinfo if
available, then mime_magic and if none are available, will do nothing.
I figure that this might be useful for other ZF components, and also for
users, and the most natural place for it is some static method of
Zend_Mime.
Any thoughts or better suggestions?
Shahar.
--
Best Regards,
Senior PHP Specialist Product Group
Zend Technologies