Filters whether a site name is taken.

The name is the site’s subdomain or the site’s subdirectory path depending on the network settings.

$result int|null

The site ID if the site name exists, null otherwise.

$domain string

Domain to be checked.

$path string

Path to be checked.

$network_id int

Network ID. Relevant only on multi-network installations.

File: wp-includes/ms-functions.php. View all references

return apply_filters( 'domain_exists', $result, $domain, $path, $network_id );