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( ABSPATH . WPINC . '/ms-load.php' );
15 require( ABSPATH . WPINC . '/ms-default-constants.php' );
17 if ( defined( 'SUNRISE' ) )
18 include_once( WP_CONTENT_DIR . '/sunrise.php' );
20 /** Check for and define SUBDOMAIN_INSTALL and the deprecated VHOST constant. */
21 ms_subdomain_constants();
23 if ( !isset( $current_site ) || !isset( $current_blog ) ) {
25 // Given the domain and path, let's try to identify the network and site.
26 // Usually, it's easier to query the site first, which declares its network.
27 // In limited situations, though, we either can or must find the network first.
29 $domain = strtolower( stripslashes( $_SERVER['HTTP_HOST'] ) );
30 if ( substr( $domain, -3 ) == ':80' ) {
31 $domain = substr( $domain, 0, -3 );
32 $_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -3 );
33 } elseif ( substr( $domain, -4 ) == ':443' ) {
34 $domain = substr( $domain, 0, -4 );
35 $_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -4 );
38 $path = strtolower( stripslashes( $_SERVER['REQUEST_URI'] ) );
40 $path = preg_replace( '#(.*)/wp-admin/.*#', '$1/', $path );
42 list( $path ) = explode( '?', $path );
44 // If the network is defined in wp-config.php, we can simply use that.
45 if ( defined( 'DOMAIN_CURRENT_SITE' ) && defined( 'PATH_CURRENT_SITE' ) ) {
46 $current_site = new stdClass;
47 $current_site->id = defined( 'SITE_ID_CURRENT_SITE' ) ? SITE_ID_CURRENT_SITE : 1;
48 $current_site->domain = DOMAIN_CURRENT_SITE;
49 $current_site->path = PATH_CURRENT_SITE;
50 if ( defined( 'BLOG_ID_CURRENT_SITE' ) ) {
51 $current_site->blog_id = BLOG_ID_CURRENT_SITE;
52 } elseif ( defined( 'BLOGID_CURRENT_SITE' ) ) { // deprecated.
53 $current_site->blog_id = BLOGID_CURRENT_SITE;
56 if ( $current_site->domain === $domain && $current_site->path === $path ) {
57 $current_blog = get_site_by_path( $domain, $path );
58 } elseif ( '/' !== $current_site->path && $current_site->domain === $domain && 0 === strpos( $path, $current_site->path ) ) {
59 // If the current network has a path and also matches the domain and path of the request,
60 // we need to look for a site using the first path segment following the network's path.
61 $current_blog = get_site_by_path( $domain, $path, 1 + count( explode( '/', trim( $current_site->path, '/' ) ) ) );
63 // Otherwise, use the first path segment (as usual).
64 $current_blog = get_site_by_path( $domain, $path, 1 );
67 } elseif ( ! is_subdomain_install() ) {
69 * A "subdomain" install can be re-interpreted to mean "can support any domain".
70 * If we're not dealing with one of these installs, then the important part is determining
71 * the network first, because we need the network's path to identify any sites.
73 if ( ! $current_site = wp_cache_get( 'current_network', 'site-options' ) ) {
74 // Are there even two networks installed?
75 $one_network = $wpdb->get_row( "SELECT * FROM $wpdb->site LIMIT 2" ); // [sic]
76 if ( 1 === $wpdb->num_rows ) {
77 $current_site = wp_get_network( $one_network );
78 wp_cache_add( 'current_network', $current_site, 'site-options' );
79 } elseif ( 0 === $wpdb->num_rows ) {
83 if ( empty( $current_site ) ) {
84 $current_site = get_network_by_path( $domain, $path, 1 );
87 if ( empty( $current_site ) ) {
89 } elseif ( $path === $current_site->path ) {
90 $current_blog = get_site_by_path( $domain, $path );
92 // Search the network path + one more path segment (on top of the network path).
93 $current_blog = get_site_by_path( $domain, $path, substr_count( $current_site->path, '/' ) );
96 // Find the site by the domain and at most the first path segment.
97 $current_blog = get_site_by_path( $domain, $path, 1 );
98 if ( $current_blog ) {
99 $current_site = wp_get_network( $current_blog->site_id ? $current_blog->site_id : 1 );
101 // If you don't have a site with the same domain/path as a network, you're pretty screwed, but:
102 $current_site = get_network_by_path( $domain, $path, 1 );
106 // The network declared by the site trumps any constants.
107 if ( $current_blog && $current_blog->site_id != $current_site->id ) {
108 $current_site = wp_get_network( $current_blog->site_id );
111 // No network has been found, bail.
112 if ( empty( $current_site ) ) {
116 // @todo Investigate when exactly this can occur.
117 if ( empty( $current_blog ) && defined( 'WP_INSTALLING' ) ) {
118 $current_blog = new stdClass;
119 $current_blog->blog_id = $blog_id = 1;
122 // No site has been found, bail.
123 if ( empty( $current_blog ) ) {
124 // We're going to redirect to the network URL, with some possible modifications.
125 $scheme = is_ssl() ? 'https' : 'http';
126 $destination = "$scheme://{$current_site->domain}{$current_site->path}";
129 * Fires when a network can be determined but a site cannot.
131 * At the time of this action, the only recourse is to redirect somewhere
132 * and exit. If you want to declare a particular site, do so earlier.
136 * @param object $current_site The network that had been determined.
137 * @param string $domain The domain used to search for a site.
138 * @param string $path The path used to search for a site.
140 do_action( 'ms_site_not_found', $current_site, $domain, $path );
142 if ( is_subdomain_install() && ! defined( 'NOBLOGREDIRECT' ) ) {
143 // For a "subdomain" install, redirect to the signup form specifically.
144 $destination .= 'wp-signup.php?new=' . str_replace( '.' . $current_site->domain, '', $domain );
145 } elseif ( is_subdomain_install() ) {
146 // For a "subdomain" install, the NOBLOGREDIRECT constant
147 // can be used to avoid a redirect to the signup form.
148 // Using the ms_site_not_found action is preferred to the constant.
149 if ( '%siteurl%' !== NOBLOGREDIRECT ) {
150 $destination = NOBLOGREDIRECT;
152 } elseif ( 0 === strcasecmp( $current_site->domain, $domain ) ) {
154 * If the domain we were searching for matches the network's domain,
155 * it's no use redirecting back to ourselves -- it'll cause a loop.
156 * As we couldn't find a site, we're simply not installed.
161 header( 'Location: ' . $destination );
165 // @todo What if the domain of the network doesn't match the current site?
166 $current_site->cookie_domain = $current_site->domain;
167 if ( 'www.' === substr( $current_site->cookie_domain, 0, 4 ) ) {
168 $current_site->cookie_domain = substr( $current_site->cookie_domain, 4 );
171 // Figure out the current network's main site.
172 if ( ! isset( $current_site->blog_id ) ) {
173 if ( $current_blog->domain === $current_site->domain && $current_blog->path === $current_site->path ) {
174 $current_site->blog_id = $current_blog->blog_id;
175 } elseif ( ! $current_site->blog_id = wp_cache_get( 'network:' . $current_site->id . ':main_site', 'site-options' ) ) {
176 $current_site->blog_id = $wpdb->get_var( $wpdb->prepare( "SELECT blog_id FROM $wpdb->blogs WHERE domain = %s AND path = %s",
177 $current_site->domain, $current_site->path ) );
178 wp_cache_add( 'network:' . $current_site->id . ':main_site', $current_site->blog_id, 'site-options' );
182 $blog_id = $current_blog->blog_id;
183 $public = $current_blog->public;
185 if ( empty( $current_blog->site_id ) ) {
186 // This dates to [MU134] and shouldn't be relevant anymore,
187 // but it could be possible for arguments passed to insert_blog() etc.
188 $current_blog->site_id = 1;
191 $site_id = $current_blog->site_id;
192 wp_load_core_site_options( $site_id );
195 $wpdb->set_prefix( $table_prefix, false ); // $table_prefix can be set in sunrise.php
196 $wpdb->set_blog_id( $current_blog->blog_id, $current_blog->site_id );
197 $table_prefix = $wpdb->get_blog_prefix();
198 $_wp_switched_stack = array();
201 // need to init cache again after blog_id is set
202 wp_start_object_cache();
204 if ( ! isset( $current_site->site_name ) ) {
205 $current_site->site_name = get_site_option( 'site_name' );
206 if ( ! $current_site->site_name ) {
207 $current_site->site_name = ucfirst( $current_site->domain );
211 // Define upload directory constants
212 ms_upload_constants();