Although this is not how to related to horde, I am posting this here as fileinfo is quite useful and I couldnt get it working for quite some time.

1. Read the /horde/doc/INSTALL
2. pear install fileinfo-beta will not work on RHEL without the following package.
3. Get the latest file package from ftp://ftp.gw.com/mirrors/pub/unix/file/
4. Install it with ./configure --prefix=/usr && make && make install
5. then pear install fileinfo-beta note: it is now changed to pecl install fileinfo-beta
6. Add the following in php.ini

;Magic mime time
mime_magic.magicfile = "/usr/share/file/magic.mime"

extension=fileinfo.so

;;;;
; Note: For Red Hat Linux, packaged extension modules are now loaded via
; the ini files in the directory /etc/php.d.
;;;;

so also add in /etc/php.d/fileinfo.ini

extension=fileinfo.so

7. restart apache and check /horde/test.php. At this point I got MIME Magic Support: Yes

I get the following errors in /var/log/httpd/error_log, not sure how to get rid of them and if it hampers the fileinfo functioning.

PHP Warning:  Function registration failed - duplicate name - finfo_open in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - finfo_close in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - finfo_set_flags in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - finfo_file in Unknown on line 0
PHP Warning:  Function registration failed - duplicate name - finfo_buffer in Unknown on line 0
PHP Warning:  fileinfo:  Unable to register functions, unable to load in Unknown on line 0
[Sat May 21 00:57:42 2005] [notice] Apache/2.0.46 (Red Hat) configured -- resuming normal operations

Request for anyone who has done the above in a proper way, do share and modify what needs to be done right.

Jigish.gohil at gmail dot com

Note: If you're getting Function registration failed - duplicate name errors, you probably have the module registered twice as an extension.
As an example, modules are loaded (on ``FreeBSD``) from /usr/local/etc/php/extensions.ini. If you had an entry for fileinfo.so inside extensions.ini,
and then you added another "extension=fileinfo.so" in php.ini - it would try to load twice (once from extensions.ini and once from php.ini), causing
the above errors. I realize the location and names of files may be different on a Red Hat system, and I use ``FreeBSD`` - but the explanation is
still valid.

For Fedora Core 4, do the following:

1. yum install php-devel
2. pear install fileinfo
3. Add the following in php.ini

;Magic mime time
mime_magic.magicfile = "/usr/share/file/magic.mime"

extension=fileinfo.so

;;;;
; Note: For Red Hat Linux, packaged extension modules are now loaded via
; the ini files in the directory /etc/php.d.
;;;;

so also add in /etc/php.d/fileinfo.ini

extension=fileinfo.so

4. restart apache and check /horde/test.php. At this point I got MIME Magic Support: Yes

tom at kofler dot eu dot org

NOTE: Most Unix-like systems doesn't correctly handle Microsoft Word and Microsoft Excel MIME types. If you very heavy rely on these types, use integrated Horde MIME magic library instead. See bug #3565 for more info.