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( ABSPATH . WPINC . '/ms-load.php' );
  15 require( ABSPATH . WPINC . '/ms-default-constants.php' );
  16
  17 if ( defined( 'SUNRISE' ) )
  18         include_once( WP_CONTENT_DIR . '/sunrise.php' );
  19
  20 /** Check for and define SUBDOMAIN_INSTALL and the deprecated VHOST constant. */
  21 ms_subdomain_constants();
  22
  23 if ( !isset( $current_site ) || !isset( $current_blog ) ) {
  24
  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.
  28
  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 );
  36         }
  37
  38         $path = strtolower( stripslashes( $_SERVER['REQUEST_URI'] ) );
  39         if ( is_admin() ) {
  40                 $path = preg_replace( '#(.*)/wp-admin/.*#', '$1/', $path );
  41         }
  42         list( $path ) = explode( '?', $path );
  43
  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;
  54                 }
  55
  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, '/' ) ) ) );
  62                 } else {
  63                         // Otherwise, use the first path segment (as usual).
  64                         $current_blog = get_site_by_path( $domain, $path, 1 );
  65                 }
  66
  67         } elseif ( ! is_subdomain_install() ) {
  68                 /*
  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.
  72                  */
  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 ) {
  80                                 ms_not_installed();
  81                         }
  82                 }
  83                 if ( empty( $current_site ) ) {
  84                         $current_site = get_network_by_path( $domain, $path, 1 );
  85                 }
  86
  87                 if ( empty( $current_site ) ) {
  88                         ms_not_installed();
  89                 } elseif ( $path === $current_site->path ) {
  90                         $current_blog = get_site_by_path( $domain, $path );
  91                 } else {
  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, '/' ) );
  94                 }
  95         } else {
  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 );
 100                 } else {
 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 );
 103                 }
 104         }
 105
 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 );
 109         }
 110
 111         // No network has been found, bail.
 112         if ( empty( $current_site ) ) {
 113                 ms_not_installed();
 114         }
 115
 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;
 120         }
 121
 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}";
 127
 128                 /**
 129                  * Fires when a network can be determined but a site cannot.
 130                  *
 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.
 133                  *
 134                  * @since 3.9.0
 135                  *
 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.
 139                  */
 140                 do_action( 'ms_site_not_found', $current_site, $domain, $path );
 141
 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;
 151                         }
 152                 } elseif ( 0 === strcasecmp( $current_site->domain, $domain ) ) {
 153                         /*
 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.
 157                          */
 158                         ms_not_installed();
 159                 }
 160
 161                 header( 'Location: ' . $destination );
 162                 exit;
 163         }
 164
 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 );
 169         }
 170
 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' );
 179                 }
 180         }
 181
 182         $blog_id = $current_blog->blog_id;
 183         $public  = $current_blog->public;
 184
 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;
 189         }
 190
 191         $site_id = $current_blog->site_id;
 192         wp_load_core_site_options( $site_id );
 193 }
 194
 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();
 199 $switched = false;
 200
 201 // need to init cache again after blog_id is set
 202 wp_start_object_cache();
 203
 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 );
 208         }
 209 }
 210
 211 // Define upload directory constants
 212 ms_upload_constants();