Find out if WordPress multisite uses subdirectory or subdomain for new blogs

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Is there a function to check if a WordPress multisite install uses the subdirectory or subdomain option when new blogs get created?

I’m using the function wpmu_create_blog to create new blogs.
The Codex explains:

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On subdirectory installs, $domain is the same as the main site’s domain, and the path is the subdirectory name (eg ‘example.com’ and ‘/blog1/’). On subdomain installs, $domain is the new subdomain + root domain (eg ‘blog1.example.com’), and $path is ‘/’.

So I would need a way to find out if the multisite is a subdirectory or subdomain install.

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2 comments

  2. You can use wp_get_sites() to get information about your blogs. It will return an array containing information about all existing blogs.

    Example result from the documentation:

    Array(
    [0] => Array(
        [blog_id] => 1
        [site_id] => 1
        [domain] => example.com
        [path] => /
        [registered] => 2013-11-08 17:56:46
        [last_updated] => 2013-11-08 18:57:19
        [public] => 1
        [archived] => 0
        [mature] => 0
        [spam] => 0
        [deleted] => 0
        [lang_id] => 0
    )

    [1] => Array(
        [blog_id] => 2
        [site_id] => 1
        [domain] => example.com
        [path] => /examplesubsite/
        [registered] => 2013-11-08 18:07:22
        [last_updated] => 2013-11-08 18:13:40
        [public] => 1
        [archived] => 0
        [mature] => 0
        [spam] => 0
        [deleted] => 0
        [lang_id] => 0
    )
)

    [0] will be your main blog, so I’d ignore this. But by checking the first blog after that you should be able to get the information.

    $info = wp_get_sites();
if ($info[1]['path'] == "/") {
    // the installation uses subdomains
}
else {
    // the installation uses subdirectorys
}

    Of course this only works when there is at least one additional blog created, but I couldn’t find any other option to check for.