Mediawiki/Common Problems

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Cannot upload files

- Error: Could not create directory "mwstore://local-backend/local-public/3/3c".  

Change ownership and provide write access to apache2 user, generally www-data, for images directory which is generally at /var/www/%mediawiki directory%/images/

sudo chown root:www-data images
sudo chmod 775 images


Cannot upload file larger than 2MB

go to the wiki site configuration file, ie. /etc/apache2/sites-available/mediawiki, and add the following lines anywhere within <Virtual Host>
php_value upload_max_filesize 20M
php_value post_max_size 20M


Uploads extremely slow

If the MediaWiki server cannot access the internet (in the case of an internal server), uploads can be extremely slow. This is because when you upload a file, the wiki calls upon an external source for some reason (it may be an image link or css). To solve this, add the following to your LocalSettings.php
$wgUseInstantCommons = false;

==filelist search on the filelist page does not work for filenames that contain a capital letter. reference: http://www.mediawiki.org/wiki/Thread:Project:Support_desk/Search_function_in_File_list_doesn't_work_properly
Prior to 1.22:
TL;DR Go to includes\specials\SpecialListfiles.php. On Line 84, change:

$this->mQueryConds[] = 'LOWER(img_name)' .

to

$this->mQueryConds[] = 'CONVERT(img_name USING latin1)' .

1.22 and after:
TL;DR Go to includes/specials/SpecialListfiles.php, Line 138 change:

$conds[] = 'LOWER(' . $prefix . '_name)' .

to

$conds[] = 'CONVERT(' . $prefix . '_name USING latin1)' .
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