apply_filters( 'admin_url', string $url, string $path, int|null $blog_id, string|null $scheme )

Parameters

$url

The complete admin area URL including scheme and path.

$path

Path relative to the admin area URL. Blank string if no path is specified.

$blog_id

Site ID, or null for the current site.

$scheme

The scheme to use. Accepts 'http', 'https', 'admin', or null. Default 'admin', which obeys force_ssl_admin() and is_ssl().