NineChime forum

How do you make the same usernames login to a different Poteto with same usernames on my site without signing up with same usernames again?

If the oekakis are both hosted on the same server, you can do this using multiple installs, and editing the "hacks.php" file of each board to link them together (by sharing a single web browser cookie).  If the oekakis are hosted on two different servers, then sharing a login is not possible, because web browsers will not share cookies between more than one server.

I want to have it also linked up to a forum with same usernames without signing up for a new one too

This can be complicated, because there are different login authorization methods and different ways of encrypting passwords.  Most people need to put a lot of modifications into the forum and the oekaki so that when a person registers for the forum, that information is also copied into the oekaki database.  The oekaki then has to use the same authorization routine used in the forum to log in (which is handled in "boot.php" and "functions.php").

Okay, first make sure that you're first oekaki is installed and running normally.  Then, when installing the second oekaki, you have to make sure the database prefixes match.  The installer has the directions for this already, in the database section.

After that, you have to modify the "hacks.php" files for both boards.  The hacks file must be identical for both boards

Which path to use depends on your server's URL.  If you're using a dedicated DNS, such as "www.MyServer.com", then this will work:

    // PATH
    {
        // Failsafe, or disable (default)
        $cookie_path = '';

        // For the whole server (be careful!) or subdomain (OK).
        // $cookie_path = '/';
    }

    // DOMAIN
    {
        // Failsafe, or disable (default)
        // $cookie_domain = '';

        // For every subdomain.  Keep the period at the front for maximum compatibility.
        $cookie_domain = '.MyServer.com'';
    }

If you're using a shared host, such as "www.HostingCorp.com/account/", then for security reasons this will be more complicated, and you might have to set the second oekaki to be a child of the first oekaki, so you would end up with two oekakis as follows:

1st board: www.HostingCorp.com/account/
2nd board: www.HostingCorp.com/account/practice/

If you can provide the URL of the board you have set up or plan to set up, I can give more specific help.  What kind of hosting you have makes a big different with how the boards may be set up.

Note:  All PHP code that has two slashes at the front, such as "// DOMAIN" means that line is ignored by PHP.  So, only one $cookie_path and $cookie_domain will ever be used.  You can't set multiple values to them, and you don't have to.

Know any help sites to link forums/oekakis together etc? And help on how to do oekaki link up right if I haven't. I can't find any help sites on it on the web.

Only a handful of people have done this, so I don't believe there's any specific instructions available.  Every type of forum has to be modified a different way, so there's no simple way to do it.