Last modified: 2013-03-14 16:35:33 UTC
this may very well be a bug in the fileinfo.so extension for PHP, but I wanted to post it in here in the event that someone else comes across the problem when using MediaWiki, and perhaps so that a flag can be added to workaround the bug. When trying to do file uploads with MediaWiki, Apache was returning an Internal Server Error, and I found this in my logs: /usr/libexec/ld-elf.so.1: /usr/local/lib/php/20050922/fileinfo.so: Undefined symbol "php_realpath" To me, this looks like a fileinfo.so bug or a PHP bug, but I couldn't find anything on PHP's bugzilla that looked relevant. Not wanting to go upsetting a stable server by blindly upgrading PHP + extensions, I started digging through the mediawiki code and traced the problem to the if block starting on line 487 in includes/MimeMagic.php. The if statement checks to see if finfo_open() and finfo_file() are available, and uses them for Mime detection if they exist. This was evaluating to true because my PHP installation *does* have these functions, but there appears to be some kind of internal issue with the fileinfo library on my server. I simply forced this if block to evaluate to false (by adding "&& false" to the conditions) so that the block falls through to the next elseif, which uses mime_content_type() instead. I suppose it might be reasonable to add a flag $wgIgnoreFinfoFunctions to force MediaWiki to use mime_content_type() instead in the presence of this issue. That is unless it's just a product of my specific server set up (e.g. php version + fileinfo version + O/S = bug), in which case I suppose it should still be noted, even if it doesn't warrant a new configuration directive. phpinfo: PHP Version 5.1.6 System 4.11-STABLE FreeBSD 4.11-STABLE #0: Fri Jan i386 fileinfo support enabled Server API CGI/FastCGI PHP API 20041225 PHP Extension 20050922 Zend Extension 220051025
Offhand it looks like you've got a bad library; perhaps a mix of compilations with different options or similar. Googling turns up at least two other instances of this error, with no response, at least one other also on FreeBSD.
Highly assuming that this was a PHP issue. Also see http://www.gossamer-threads.com/lists/wiki/mediawiki/147360 http://www.gossamer-threads.com/lists/wiki/mediawiki/146985 Closing as WORKSFORME, but in case this still happens please reopen and provide more info (MediaWiki and PHP version).
