Thread:Project:Support desk/Upgrade/migrate MediaWiki 1.12.0 to another server/reply (2)

You should copy your database from your old server to the new one (exporting and importing), while having on the new server your new MediaWiki installation, database and PHP versions. Then, basically, follow Manual:Upgrading.

Basically, on the new server:
 * unpack the new MediaWiki installation files
 * Download and unpack recent versions of Extensions you had in old MediaWiki (download extensions matching your new MediaWiki version, if you're going to use 1.19, download extensions for 1.19, not latest!)
 * Copy your old LocalSettings.php to the new server, maybe disable some extensions if they became obsolete or if they may cause problems, and (if applicable) adapt the database connection settings
 * run update.php from the command line.