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();