3 * Used to set up and fix common variables and include
4 * the Multisite procedural and class library.
6 * Allows for some configuration in wp-config.php (see ms-default-constants.php)
9 * @subpackage Multisite
13 /** Include Multisite initialization functions */
14 require_once( ABSPATH . WPINC . '/ms-load.php' );
15 require_once( ABSPATH . WPINC . '/ms-default-constants.php' );
17 if ( defined( 'SUNRISE' ) ) {
18 include_once( WP_CONTENT_DIR . '/sunrise.php' );
21 /** Check for and define SUBDOMAIN_INSTALL and the deprecated VHOST constant. */
22 ms_subdomain_constants();
24 if ( !isset( $current_site ) || !isset( $current_blog ) ) {
26 // Given the domain and path, let's try to identify the network and site.
27 // Usually, it's easier to query the site first, which declares its network.
28 // In limited situations, though, we either can or must find the network first.
30 $domain = strtolower( stripslashes( $_SERVER['HTTP_HOST'] ) );
31 if ( substr( $domain, -3 ) == ':80' ) {
32 $domain = substr( $domain, 0, -3 );
33 $_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -3 );
34 } elseif ( substr( $domain, -4 ) == ':443' ) {
35 $domain = substr( $domain, 0, -4 );
36 $_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -4 );
39 $path = stripslashes( $_SERVER['REQUEST_URI'] );
41 $path = preg_replace( '#(.*)/wp-admin/.*#', '$1/', $path );
43 list( $path ) = explode( '?', $path );
45 // If the network is defined in wp-config.php, we can simply use that.
46 if ( defined( 'DOMAIN_CURRENT_SITE' ) && defined( 'PATH_CURRENT_SITE' ) ) {
47 $current_site = new stdClass;
48 $current_site->id = defined( 'SITE_ID_CURRENT_SITE' ) ? SITE_ID_CURRENT_SITE : 1;
49 $current_site->domain = DOMAIN_CURRENT_SITE;
50 $current_site->path = PATH_CURRENT_SITE;
51 if ( defined( 'BLOG_ID_CURRENT_SITE' ) ) {
52 $current_site->blog_id = BLOG_ID_CURRENT_SITE;
53 } elseif ( defined( 'BLOGID_CURRENT_SITE' ) ) { // deprecated.
54 $current_site->blog_id = BLOGID_CURRENT_SITE;
57 if ( 0 === strcasecmp( $current_site->domain, $domain ) && 0 === strcasecmp( $current_site->path, $path ) ) {
58 $current_blog = get_site_by_path( $domain, $path );
59 } elseif ( '/' !== $current_site->path && 0 === strcasecmp( $current_site->domain, $domain ) && 0 === stripos( $path, $current_site->path ) ) {
60 // If the current network has a path and also matches the domain and path of the request,
61 // we need to look for a site using the first path segment following the network's path.
62 $current_blog = get_site_by_path( $domain, $path, 1 + count( explode( '/', trim( $current_site->path, '/' ) ) ) );
64 // Otherwise, use the first path segment (as usual).
65 $current_blog = get_site_by_path( $domain, $path, 1 );
68 } elseif ( ! is_subdomain_install() ) {
70 * A "subdomain" install can be re-interpreted to mean "can support any domain".
71 * If we're not dealing with one of these installs, then the important part is determining
72 * the network first, because we need the network's path to identify any sites.
74 if ( ! $current_site = wp_cache_get( 'current_network', 'site-options' ) ) {
75 // Are there even two networks installed?
76 $one_network = $wpdb->get_row( "SELECT * FROM $wpdb->site LIMIT 2" ); // [sic]
77 if ( 1 === $wpdb->num_rows ) {
78 $current_site = wp_get_network( $one_network );
79 wp_cache_add( 'current_network', $current_site, 'site-options' );
80 } elseif ( 0 === $wpdb->num_rows ) {
84 if ( empty( $current_site ) ) {
85 $current_site = get_network_by_path( $domain, $path, 1 );
88 if ( empty( $current_site ) ) {
90 } elseif ( $path === $current_site->path ) {
91 $current_blog = get_site_by_path( $domain, $path );
93 // Search the network path + one more path segment (on top of the network path).
94 $current_blog = get_site_by_path( $domain, $path, substr_count( $current_site->path, '/' ) );
97 // Find the site by the domain and at most the first path segment.
98 $current_blog = get_site_by_path( $domain, $path, 1 );
99 if ( $current_blog ) {
100 $current_site = wp_get_network( $current_blog->site_id ? $current_blog->site_id : 1 );
102 // If you don't have a site with the same domain/path as a network, you're pretty screwed, but:
103 $current_site = get_network_by_path( $domain, $path, 1 );
107 // The network declared by the site trumps any constants.
108 if ( $current_blog && $current_blog->site_id != $current_site->id ) {
109 $current_site = wp_get_network( $current_blog->site_id );
112 // No network has been found, bail.
113 if ( empty( $current_site ) ) {
117 // @todo Investigate when exactly this can occur.
118 if ( empty( $current_blog ) && defined( 'WP_INSTALLING' ) ) {
119 $current_blog = new stdClass;
120 $current_blog->blog_id = $blog_id = 1;
123 // No site has been found, bail.
124 if ( empty( $current_blog ) ) {
125 // We're going to redirect to the network URL, with some possible modifications.
126 $scheme = is_ssl() ? 'https' : 'http';
127 $destination = "$scheme://{$current_site->domain}{$current_site->path}";
130 * Fires when a network can be determined but a site cannot.
132 * At the time of this action, the only recourse is to redirect somewhere
133 * and exit. If you want to declare a particular site, do so earlier.
137 * @param object $current_site The network that had been determined.
138 * @param string $domain The domain used to search for a site.
139 * @param string $path The path used to search for a site.
141 do_action( 'ms_site_not_found', $current_site, $domain, $path );
143 if ( is_subdomain_install() && ! defined( 'NOBLOGREDIRECT' ) ) {
144 // For a "subdomain" install, redirect to the signup form specifically.
145 $destination .= 'wp-signup.php?new=' . str_replace( '.' . $current_site->domain, '', $domain );
146 } elseif ( is_subdomain_install() ) {
147 // For a "subdomain" install, the NOBLOGREDIRECT constant
148 // can be used to avoid a redirect to the signup form.
149 // Using the ms_site_not_found action is preferred to the constant.
150 if ( '%siteurl%' !== NOBLOGREDIRECT ) {
151 $destination = NOBLOGREDIRECT;
153 } elseif ( 0 === strcasecmp( $current_site->domain, $domain ) ) {
155 * If the domain we were searching for matches the network's domain,
156 * it's no use redirecting back to ourselves -- it'll cause a loop.
157 * As we couldn't find a site, we're simply not installed.
162 header( 'Location: ' . $destination );
166 // @todo What if the domain of the network doesn't match the current site?
167 $current_site->cookie_domain = $current_site->domain;
168 if ( 'www.' === substr( $current_site->cookie_domain, 0, 4 ) ) {
169 $current_site->cookie_domain = substr( $current_site->cookie_domain, 4 );
172 // Figure out the current network's main site.
173 if ( ! isset( $current_site->blog_id ) ) {
174 if ( $current_blog->domain === $current_site->domain && $current_blog->path === $current_site->path ) {
175 $current_site->blog_id = $current_blog->blog_id;
176 } elseif ( ! $current_site->blog_id = wp_cache_get( 'network:' . $current_site->id . ':main_site', 'site-options' ) ) {
177 $current_site->blog_id = $wpdb->get_var( $wpdb->prepare( "SELECT blog_id FROM $wpdb->blogs WHERE domain = %s AND path = %s",
178 $current_site->domain, $current_site->path ) );
179 wp_cache_add( 'network:' . $current_site->id . ':main_site', $current_site->blog_id, 'site-options' );
183 $blog_id = $current_blog->blog_id;
184 $public = $current_blog->public;
186 if ( empty( $current_blog->site_id ) ) {
187 // This dates to [MU134] and shouldn't be relevant anymore,
188 // but it could be possible for arguments passed to insert_blog() etc.
189 $current_blog->site_id = 1;
192 $site_id = $current_blog->site_id;
193 wp_load_core_site_options( $site_id );
196 $wpdb->set_prefix( $table_prefix, false ); // $table_prefix can be set in sunrise.php
197 $wpdb->set_blog_id( $current_blog->blog_id, $current_blog->site_id );
198 $table_prefix = $wpdb->get_blog_prefix();
199 $_wp_switched_stack = array();
202 // need to init cache again after blog_id is set
203 wp_start_object_cache();
205 if ( ! isset( $current_site->site_name ) ) {
206 $current_site->site_name = get_site_option( 'site_name' );
207 if ( ! $current_site->site_name ) {
208 $current_site->site_name = ucfirst( $current_site->domain );
212 // Define upload directory constants
213 ms_upload_constants();