Hello

If yes, does it require several MySQL databases, or just one single database?

No, you can define a unique table prefix per installation.

As an amendment: If you prefer a common user database, you can specify the preferred user-data-table in config/db_settings.php after an additional installation.

db_settings.php of the first installation:

<?php
// Database host, mostly 'localhost':
$db_settings['host'] = 'localhost';
// Database name:
$db_settings['database'] = 'database123';
// Database user name:
$db_settings['user'] = 'user123';
// Database password:
$db_settings['password'] = 'password123';
// Database tables (normally not necessary to edit): 
$db_settings['settings_table'] =       'mlf2_settings';
$db_settings['forum_table'] =          'mlf2_entries';
$db_settings['category_table'] =       'mlf2_categories';
$db_settings['userdata_table'] =       'mlf2_userdata';
$db_settings['smilies_table'] =        'mlf2_smilies';
$db_settings['pages_table'] =          'mlf2_pages';
$db_settings['banlists_table'] =       'mlf2_banlists';
$db_settings['useronline_table'] =     'mlf2_useronline';
$db_settings['login_control_table'] =  'mlf2_logincontrol';
$db_settings['entry_cache_table'] =    'mlf2_entries_cache';
$db_settings['userdata_cache_table'] = 'mlf2_userdata_cache';
$db_settings['bookmark_table'] =       'mlf2_bookmarks';
$db_settings['read_status_table'] =    'mlf2_read_entries';
$db_settings['temp_infos_table'] =     'mlf2_temp_infos';
?>

db_settings.php of the second installation:

<?php
// Database host, mostly 'localhost':
$db_settings['host'] = 'localhost';
// Database name:
$db_settings['database'] = 'database123';
// Database user name:
$db_settings['user'] = 'user123';
// Database password:
$db_settings['password'] = 'password123';
// Database tables (normally not necessary to edit): 
$db_settings['settings_table'] =       'mlf21_settings';
$db_settings['forum_table'] =          'mlf21_entries';
$db_settings['category_table'] =       'mlf21_categories';
$db_settings['userdata_table'] =       'mlf2_userdata'; // common user data
$db_settings['smilies_table'] =        'mlf21_smilies';
$db_settings['pages_table'] =          'mlf21_pages';
$db_settings['banlists_table'] =       'mlf2_banlists'; // common banlists
$db_settings['useronline_table'] =     'mlf21_useronline';
$db_settings['login_control_table'] =  'mlf21_logincontrol';
$db_settings['entry_cache_table'] =    'mlf21_entries_cache';
$db_settings['userdata_cache_table'] = 'mlf2_userdata_cache'; // common user data cache
$db_settings['bookmark_table'] =       'mlf21_bookmarks';
$db_settings['read_status_table'] =    'mlf21_read_entries';
$db_settings['temp_infos_table'] =     'mlf21_temp_infos';
?>

With that settings the second installation will use the user- and the banlists of the first installation. You'll need different cookie prefixes, as Milo said.

Tschö, Auge

Dear Micha,

Thank you very much for your kind reply. That sounds really exciting.

I can imagine how to change the prefix for database tables during installation.

But could you please tell me about some overview as to how to actually make it happen? After installing the 1st forum, I can no longer access the install folder, so I cannot figure out how to install the 2nd forum.

I am sorry for many questions, and thank you once again for your kind help.