WordPress 4.0
[autoinstalls/wordpress.git] / wp-includes / ms-settings.php
1 <?php
2 /**
3  * Used to set up and fix common variables and include
4  * the Multisite procedural and class library.
5  *
6  * Allows for some configuration in wp-config.php (see ms-default-constants.php)
7  *
8  * @package WordPress
9  * @subpackage Multisite
10  * @since 3.0.0
11  */
12
13 /** Include Multisite initialization functions */
14 require_once( ABSPATH . WPINC . '/ms-load.php' );
15 require_once( ABSPATH . WPINC . '/ms-default-constants.php' );
16
17 if ( defined( 'SUNRISE' ) ) {
18         include_once( WP_CONTENT_DIR . '/sunrise.php' );
19 }
20
21 /** Check for and define SUBDOMAIN_INSTALL and the deprecated VHOST constant. */
22 ms_subdomain_constants();
23
24 if ( !isset( $current_site ) || !isset( $current_blog ) ) {
25
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.
29
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 );
37         }
38
39         $path = stripslashes( $_SERVER['REQUEST_URI'] );
40         if ( is_admin() ) {
41                 $path = preg_replace( '#(.*)/wp-admin/.*#', '$1/', $path );
42         }
43         list( $path ) = explode( '?', $path );
44
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;
55                 }
56
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, '/' ) ) ) );
63                 } else {
64                         // Otherwise, use the first path segment (as usual).
65                         $current_blog = get_site_by_path( $domain, $path, 1 );
66                 }
67
68         } elseif ( ! is_subdomain_install() ) {
69                 /*
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.
73                  */
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 ) {
81                                 ms_not_installed();
82                         }
83                 }
84                 if ( empty( $current_site ) ) {
85                         $current_site = get_network_by_path( $domain, $path, 1 );
86                 }
87
88                 if ( empty( $current_site ) ) {
89                         ms_not_installed();
90                 } elseif ( $path === $current_site->path ) {
91                         $current_blog = get_site_by_path( $domain, $path );
92                 } else {
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, '/' ) );
95                 }
96         } else {
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 );
101                 } else {
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 );
104                 }
105         }
106
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 );
110         }
111
112         // No network has been found, bail.
113         if ( empty( $current_site ) ) {
114                 ms_not_installed();
115         }
116
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;
121         }
122
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}";
128
129                 /**
130                  * Fires when a network can be determined but a site cannot.
131                  *
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.
134                  *
135                  * @since 3.9.0
136                  *
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.
140                  */
141                 do_action( 'ms_site_not_found', $current_site, $domain, $path );
142
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;
152                         }
153                 } elseif ( 0 === strcasecmp( $current_site->domain, $domain ) ) {
154                         /*
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.
158                          */
159                         ms_not_installed();
160                 }
161
162                 header( 'Location: ' . $destination );
163                 exit;
164         }
165
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 );
170         }
171
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' );
180                 }
181         }
182
183         $blog_id = $current_blog->blog_id;
184         $public  = $current_blog->public;
185
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;
190         }
191
192         $site_id = $current_blog->site_id;
193         wp_load_core_site_options( $site_id );
194 }
195
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();
200 $switched = false;
201
202 // need to init cache again after blog_id is set
203 wp_start_object_cache();
204
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 );
209         }
210 }
211
212 // Define upload directory constants
213 ms_upload_constants();