The ultimate minimalist solution consists of symlinks,
aaaa.my.org -> mediawiki
bbbb.my.org -> mediawiki
cccc.my.org -> mediawiki
and in mediawiki/LocalSettings.php:
$sites=array('aaaa','bbbb','cccc');
foreach ($sites as $v){
if(strpos($_SERVER['SCRIPT_FILENAME'].$_SERVER['PWD'],$v))
{$wgDBname=$v;break;}}
$wgLogo="/skins/common/images/$wgDBname.png"; $wgSitename=$wgDBname;
http://www.mediawiki.org/wiki/Manual:Wiki_family#Ultimate_minimalist_soluti…