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<?php
/**
 * These functions are needed to load Multisite.
 *
 * @since 3.0.0
 *
 * @package WordPress
 * @subpackage Multisite
 */

/**
 * Whether a subdomain configuration is enabled.
 *
 * @since 3.0.0
 *
 * @return bool True if subdomain configuration is enabled, false otherwise.
 */
function is_subdomain_install() {
	if ( defined( 'SUBDOMAIN_INSTALL' ) ) {
		return SUBDOMAIN_INSTALL;
	}

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

/**
 * Returns array of network plugin files to be included in global scope.
 *
 * The default directory is wp-content/plugins. To change the default directory
 * manually, define `WP_PLUGIN_DIR` and `WP_PLUGIN_URL` in `wp-config.php`.
 *
 * @access private
 * @since 3.1.0
 *
 * @return string[] Array of absolute paths to files to include.
 */
function wp_get_active_network_plugins() {
	$active_plugins = (array) get_site_option( 'active_sitewide_plugins', array() );
	if ( empty( $active_plugins ) ) {
		return array();
	}

$plugins        = array();
	$active_plugins = array_keys( $active_plugins );
	sort( $active_plugins );

foreach ( $active_plugins as $plugin ) {
		if ( ! validate_file( $plugin )                     // $plugin must validate as file.
			&& str_ends_with( $plugin, '.php' )             // $plugin must end with '.php'.
			&& file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist.
			) {
			$plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
		}
	}

return $plugins;
}

/**
 * Checks status of current blog.
 *
 * Checks if the blog is deleted, inactive, archived, or spammed.
 *
 * Dies with a default message if the blog does not pass the check.
 *
 * To change the default message when a blog does not pass the check,
 * use the wp-content/blog-deleted.php, blog-inactive.php and
 * blog-suspended.php drop-ins.
 *
 * @since 3.0.0
 *
 * @return true|string Returns true on success, or drop-in file to include.
 */
function ms_site_check() {

/**
	 * Filters checking the status of the current blog.
	 *
	 * @since 3.0.0
	 *
	 * @param bool|null $check Whether to skip the blog status check. Default null.
	 */
	$check = apply_filters( 'ms_site_check', null );
	if ( null !== $check ) {
		return true;
	}

// Allow super admins to see blocked sites.
	if ( is_super_admin() ) {
		return true;
	}

$blog = get_site();

if ( '1' == $blog->deleted ) {
		if ( file_exists( WP_CONTENT_DIR . '/blog-deleted.php' ) ) {
			return WP_CONTENT_DIR . '/blog-deleted.php';
		} else {
			wp_die( __( 'This site is no longer available.' ), '', array( 'response' => 410 ) );
		}
	}

if ( '2' == $blog->deleted ) {
		if ( file_exists( WP_CONTENT_DIR . '/blog-inactive.php' ) ) {
			return WP_CONTENT_DIR . '/blog-inactive.php';
		} else {
			$admin_email = str_replace( '@', ' AT ', get_site_option( 'admin_email', 'support@' . get_network()->domain ) );
			wp_die(
				sprintf(
					/* translators: %s: Admin email link. */
					__( 'This site has not been activated yet. If you are having problems activating your site, please contact %s.' ),
					sprintf( '<a href="mailto:%1$s">%1$s</a>', $admin_email )
				)
			);
		}
	}

if ( '1' == $blog->archived || '1' == $blog->spam ) {
		if ( file_exists( WP_CONTENT_DIR . '/blog-suspended.php' ) ) {
			return WP_CONTENT_DIR . '/blog-suspended.php';
		} else {
			wp_die( __( 'This site has been archived or suspended.' ), '', array( 'response' => 410 ) );
		}
	}

return true;
}

/**
 * Retrieves the closest matching network for a domain and path.
 *
 * @since 3.9.0
 *
 * @internal In 4.4.0, converted to a wrapper for WP_Network::get_by_path()
 *
 * @param string   $domain   Domain to check.
 * @param string   $path     Path to check.
 * @param int|null $segments Path segments to use. Defaults to null, or the full path.
 * @return WP_Network|false Network object if successful. False when no network is found.
 */
function get_network_by_path( $domain, $path, $segments = null ) {
	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 exac