return ( defined( 'VHOST' ) && VHOST == 'yes' );

 * @return true|string Returns true on success, or drop-in file to include.

	 * Filters checking the status of the current blog.

	$blog = get_site();

		if ( file_exists( WP_CONTENT_DIR . '/blog-inactive.php' ) ) {

		} else {

			$admin_email = str_replace( '@', ' AT ', get_site_option( 'admin_email', 'support@' . get_network()->domain ) );

			wp_die(

				/* translators: %s: admin email link */

				sprintf( __( 'This site has not been activated yet. If you are having problems activating your site, please contact %s.' ),

					sprintf( '<a href="mailto:%s">%s</a>', $admin_email )

				)

			);

		}

 * Retrieve the closest matching network for a domain and path.

 * @internal In 4.4.0, converted to a wrapper for WP_Network::get_by_path()

 *

 * @return WP_Network|false Network object if successful. False when no network is found.

	return WP_Network::get_by_path( $domain, $path, $segments );

 * Retrieves the closest matching site object by its domain and path.

 *

 * This will not necessarily return an exact match for a domain and path. Instead, it

 * breaks the domain and path into pieces that are then used to match the closest

 * possibility from a query.

 *

 * The intent of this method is to match a site object during bootstrap for a

 * requested site address

 * @since 4.7.0 Updated to always return a `WP_Site` object.

 * @global wpdb $wpdb WordPress database abstraction object.

 * @return WP_Site|false Site object if successful. False when no site is found.

	 * Filters the number of path segments to consider when searching for a site.

	 * @param null|bool|WP_Site $site     Site value to return by path.

	 * @param string            $domain   The requested domain.

	 * @param string            $path     The requested path, in full.

	 * @param int|null          $segments The suggested number of paths to consult.

	 *                                    Default null, meaning the entire path was to be consulted.

	 * @param array             $paths    The paths to search for, based on $path and $segments.

		if ( false !== $pre && ! $pre instanceof WP_Site ) {

			$pre = new WP_Site( $pre );

		}

	 * caching, etc. Consider alternative optimization routes,

	}

	$args = array(

		'domain__in' => $domains,

		'path__in' => $paths,

		'number' => 1,

	);

	if ( count( $domains ) > 1 ) {

		$args['orderby']['domain_length'] = 'DESC';

		$args['orderby']['path_length'] = 'DESC';

	$result = get_sites( $args );

	$site = array_shift( $result );

 * Identifies the network and site of a requested domain and path and populates the

 * corresponding network and site global objects as part of the multisite bootstrap process.

 *

 * Prior to 4.6.0, this was a procedural block in `ms-settings.php`. It was wrapped into

 * a function to facilitate unit tests. It should not be used outside of core.

 *

 * Usually, it's easier to query the site first, which then declares its network.

 * In limited situations, we either can or must find the network first.

 *

 * If a network and site are found, a `true` response will be returned so that the

 * request can continue.

 *

 * If neither a network or site is found, `false` or a URL string will be returned

 * so that either an error can be shown or a redirect can occur.

 *

 * @since 4.6.0

 * @access private

 *

 * @global WP_Network $current_site The current network.

 * @global WP_Site    $current_blog The current site.

 *

 * @param string $domain    The requested domain.

 * @param string $path      The requested path.

 * @param bool   $subdomain Optional. Whether a subdomain (true) or subdirectory (false) configuration.

 *                          Default false.

 * @return bool|string True if bootstrap successfully populated `$current_blog` and `$current_site`.

 *                     False if bootstrap could not be properly completed.

 *                     Redirect URL if parts exist, but the request as a whole can not be fulfilled.

 */

function ms_load_current_site_and_network( $domain, $path, $subdomain = false ) {

	global $current_site, $current_blog;

	// If the network is defined in wp-config.php, we can simply use that.

	if ( defined( 'DOMAIN_CURRENT_SITE' ) && defined( 'PATH_CURRENT_SITE' ) ) {

		$current_site = new stdClass;

		$current_site->id = defined( 'SITE_ID_CURRENT_SITE' ) ? SITE_ID_CURRENT_SITE : 1;

		$current_site->domain = DOMAIN_CURRENT_SITE;

		$current_site->path = PATH_CURRENT_SITE;

		if ( defined( 'BLOG_ID_CURRENT_SITE' ) ) {

			$current_site->blog_id = BLOG_ID_CURRENT_SITE;

		} elseif ( defined( 'BLOGID_CURRENT_SITE' ) ) { // deprecated.

			$current_site->blog_id = BLOGID_CURRENT_SITE;

		}

		if ( 0 === strcasecmp( $current_site->domain, $domain ) && 0 === strcasecmp( $current_site->path, $path ) ) {

			$current_blog = get_site_by_path( $domain, $path );

		} elseif ( '/' !== $current_site->path && 0 === strcasecmp( $current_site->domain, $domain ) && 0 === stripos( $path, $current_site->path ) ) {

			// If the current network has a path and also matches the domain and path of the request,

			// we need to look for a site using the first path segment following the network's path.

			$current_blog = get_site_by_path( $domain, $path, 1 + count( explode( '/', trim( $current_site->path, '/' ) ) ) );

		} else {

			// Otherwise, use the first path segment (as usual).

			$current_blog = get_site_by_path( $domain, $path, 1 );

		}

	} elseif ( ! $subdomain ) {

		/*

		 * A "subdomain" installation can be re-interpreted to mean "can support any domain".

		 * If we're not dealing with one of these installations, then the important part is determining

		 * the network first, because we need the network's path to identify any sites.

		 */

		if ( ! $current_site = wp_cache_get( 'current_network', 'site-options' ) ) {

			// Are there even two networks installed?

			$networks = get_networks( array( 'number' => 2 ) );

			if ( count( $networks ) === 1 ) {

				$current_site = array_shift( $networks );

				wp_cache_add( 'current_network', $current_site, 'site-options' );

			} elseif ( empty( $networks ) ) {

				// A network not found hook should fire here.

				return false;

			}

		}

		if ( empty( $current_site ) ) {

			$current_site = WP_Network::get_by_path( $domain, $path, 1 );

		}

		if ( empty( $current_site ) ) {

			/**

			 * Fires when a network cannot be found based on the requested domain and path.

			 *

			 * At the time of this action, the only recourse is to redirect somewhere

			 * and exit. If you want to declare a particular network, do so earlier.

			 *

			 * @since 4.4.0

			 *

			 * @param string $domain       The domain used to search for a network.

			 * @param string $path         The path used to search for a path.

			 */

			do_action( 'ms_network_not_found', $domain, $path );

			return false;

		} elseif ( $path === $current_site->path ) {

			$current_blog = get_site_by_path( $domain, $path );

		} else {

			// Search the network path + one more path segment (on top of the network path).

			$current_blog = get_site_by_path( $domain, $path, substr_count( $current_site->path, '/' ) );

		}

	} else {

		// Find the site by the domain and at most the first path segment.

		$current_blog = get_site_by_path( $domain, $path, 1 );

		if ( $current_blog ) {

			$current_site = WP_Network::get_instance( $current_blog->site_id ? $current_blog->site_id : 1 );

		} else {

			// If you don't have a site with the same domain/path as a network, you're pretty screwed, but:

			$current_site = WP_Network::get_by_path( $domain, $path, 1 );

		}

	}

	// The network declared by the site trumps any constants.

	if ( $current_blog && $current_blog->site_id != $current_site->id ) {

		$current_site = WP_Network::get_instance( $current_blog->site_id );

	}

	// No network has been found, bail.

	if ( empty( $current_site ) ) {

		/** This action is documented in wp-includes/ms-settings.php */

		do_action( 'ms_network_not_found', $domain, $path );

		return false;

	}

	// During activation of a new subdomain, the requested site does not yet exist.

	if ( empty( $current_blog ) && wp_installing() ) {

		$current_blog = new stdClass;

		$current_blog->blog_id = $blog_id = 1;

		$current_blog->public = 1;

	}

	// No site has been found, bail.

	if ( empty( $current_blog ) ) {

		// We're going to redirect to the network URL, with some possible modifications.

		$scheme = is_ssl() ? 'https' : 'http';

		$destination = "$scheme://{$current_site->domain}{$current_site->path}";

		/**

		 * Fires when a network can be determined but a site cannot.

		 *

		 * At the time of this action, the only recourse is to redirect somewhere

		 * and exit. If you want to declare a particular site, do so earlier.

		 *

		 * @since 3.9.0

		 *

		 * @param object $current_site The network that had been determined.

		 * @param string $domain       The domain used to search for a site.

		 * @param string $path         The path used to search for a site.

		 */

		do_action( 'ms_site_not_found', $current_site, $domain, $path );

		if ( $subdomain && ! defined( 'NOBLOGREDIRECT' ) ) {

			// For a "subdomain" installation, redirect to the signup form specifically.

			$destination .= 'wp-signup.php?new=' . str_replace( '.' . $current_site->domain, '', $domain );

		} elseif ( $subdomain ) {

			// For a "subdomain" installation, the NOBLOGREDIRECT constant

			// can be used to avoid a redirect to the signup form.

			// Using the ms_site_not_found action is preferred to the constant.

			if ( '%siteurl%' !== NOBLOGREDIRECT ) {

				$destination = NOBLOGREDIRECT;

			}

		} elseif ( 0 === strcasecmp( $current_site->domain, $domain ) ) {

			/*