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   1  <?php
   2  /**
   3   * These functions are needed to load Multisite.
   4   *
   5   * @since 3.0.0
   6   *
   7   * @package WordPress
   8   * @subpackage Multisite
   9   */
  10  
  11  /**
  12   * Whether a subdomain configuration is enabled.
  13   *
  14   * @since 3.0.0
  15   *
  16   * @return bool True if subdomain configuration is enabled, false otherwise.
  17   */
  18  function is_subdomain_install() {
  19      if ( defined('SUBDOMAIN_INSTALL') )
  20          return SUBDOMAIN_INSTALL;
  21  
  22      if ( defined('VHOST') && VHOST == 'yes' )
  23          return true;
  24  
  25      return false;
  26  }
  27  
  28  /**
  29   * Returns array of network plugin files to be included in global scope.
  30   *
  31   * The default directory is wp-content/plugins. To change the default directory
  32   * manually, define <code>WP_PLUGIN_DIR</code> and <code>WP_PLUGIN_URL</code>
  33   * in wp-config.php.
  34   *
  35   * @access private
  36   * @since 3.1.0
  37   * @return array Files to include
  38   */
  39  function wp_get_active_network_plugins() {
  40      $active_plugins = (array) get_site_option( 'active_sitewide_plugins', array() );
  41      if ( empty( $active_plugins ) )
  42          return array();
  43  
  44      $plugins = array();
  45      $active_plugins = array_keys( $active_plugins );
  46      sort( $active_plugins );
  47  
  48      foreach ( $active_plugins as $plugin ) {
  49          if ( ! validate_file( $plugin ) // $plugin must validate as file
  50              && '.php' == substr( $plugin, -4 ) // $plugin must end with '.php'
  51              && file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist
  52              )
  53          $plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
  54      }
  55      return $plugins;
  56  }
  57  
  58  /**
  59   * Checks status of current blog.
  60   *
  61   * Checks if the blog is deleted, inactive, archived, or spammed.
  62   *
  63   * Dies with a default message if the blog does not pass the check.
  64   *
  65   * To change the default message when a blog does not pass the check,
  66   * use the wp-content/blog-deleted.php, blog-inactive.php and
  67   * blog-suspended.php drop-ins.
  68   *
  69   * @since 3.0.0
  70   *
  71   * @return bool|string Returns true on success, or drop-in file to include.
  72   */
  73  function ms_site_check() {
  74      $blog = get_blog_details();
  75  
  76      /**
  77       * Filter checking the status of the current blog.
  78       *
  79       * @since 3.0.0
  80       *
  81       * @param bool null Whether to skip the blog status check. Default null.
  82      */
  83      $check = apply_filters( 'ms_site_check', null );
  84      if ( null !== $check )
  85          return true;
  86  
  87      // Allow super admins to see blocked sites
  88      if ( is_super_admin() )
  89          return true;
  90  
  91      if ( '1' == $blog->deleted ) {
  92          if ( file_exists( WP_CONTENT_DIR . '/blog-deleted.php' ) )
  93              return WP_CONTENT_DIR . '/blog-deleted.php';
  94          else
  95              wp_die( __( 'This user has elected to delete their account and the content is no longer available.' ), '', array( 'response' => 410 ) );
  96      }
  97  
  98      if ( '2' == $blog->deleted ) {
  99          if ( file_exists( WP_CONTENT_DIR . '/blog-inactive.php' ) )
 100              return WP_CONTENT_DIR . '/blog-inactive.php';
 101          else
 102              wp_die( sprintf( __( 'This site has not been activated yet. If you are having problems activating your site, please contact <a href="mailto:%1$s">%1$s</a>.' ), str_replace( '@', ' AT ', get_site_option( 'admin_email', 'support@' . get_current_site()->domain ) ) ) );
 103      }
 104  
 105      if ( $blog->archived == '1' || $blog->spam == '1' ) {
 106          if ( file_exists( WP_CONTENT_DIR . '/blog-suspended.php' ) )
 107              return WP_CONTENT_DIR . '/blog-suspended.php';
 108          else
 109              wp_die( __( 'This site has been archived or suspended.' ), '', array( 'response' => 410 ) );
 110      }
 111  
 112      return true;
 113  }
 114  
 115  /**
 116   * Sets current site name.
 117   *
 118   * @access private
 119   * @since 3.0.0
 120   * @return object $current_site object with site_name
 121   */
 122  function get_current_site_name( $current_site ) {
 123      global $wpdb;
 124  
 125      $current_site->site_name = wp_cache_get( $current_site->id . ':site_name', 'site-options' );
 126      if ( ! $current_site->site_name ) {
 127          $current_site->site_name = $wpdb->get_var( $wpdb->prepare( "SELECT meta_value FROM $wpdb->sitemeta WHERE site_id = %d AND meta_key = 'site_name'", $current_site->id ) );
 128          if ( ! $current_site->site_name )
 129              $current_site->site_name = ucfirst( $current_site->domain );
 130          wp_cache_set( $current_site->id . ':site_name', $current_site->site_name, 'site-options' );
 131      }
 132  
 133      return $current_site;
 134  }
 135  
 136  /**
 137   * Sets current_site object.
 138   *
 139   * @access private
 140   * @since 3.0.0
 141   * @return object $current_site object
 142   */
 143  function wpmu_current_site() {
 144      global $wpdb, $current_site, $domain, $path, $sites, $cookie_domain;
 145  
 146      if ( empty( $current_site ) )
 147          $current_site = new stdClass;
 148  
 149      if ( defined( 'DOMAIN_CURRENT_SITE' ) && defined( 'PATH_CURRENT_SITE' ) ) {
 150          $current_site->id = defined( 'SITE_ID_CURRENT_SITE' ) ? SITE_ID_CURRENT_SITE : 1;
 151          $current_site->domain = DOMAIN_CURRENT_SITE;
 152          $current_site->path   = $path = PATH_CURRENT_SITE;
 153          if ( defined( 'BLOG_ID_CURRENT_SITE' ) )
 154              $current_site->blog_id = BLOG_ID_CURRENT_SITE;
 155          elseif ( defined( 'BLOGID_CURRENT_SITE' ) ) // deprecated.
 156              $current_site->blog_id = BLOGID_CURRENT_SITE;
 157          if ( DOMAIN_CURRENT_SITE == $domain )
 158              $current_site->cookie_domain = $cookie_domain;
 159          elseif ( substr( $current_site->domain, 0, 4 ) == 'www.' )
 160              $current_site->cookie_domain = substr( $current_site->domain, 4 );
 161          else
 162              $current_site->cookie_domain = $current_site->domain;
 163  
 164          wp_load_core_site_options( $current_site->id );
 165  
 166          return $current_site;
 167      }
 168  
 169      $current_site = wp_cache_get( 'current_site', 'site-options' );
 170      if ( $current_site )
 171          return $current_site;
 172  
 173      $sites = $wpdb->get_results( "SELECT * FROM $wpdb->site" ); // usually only one site
 174      if ( 1 == count( $sites ) ) {
 175          $current_site = $sites[0];
 176          wp_load_core_site_options( $current_site->id );
 177          $path = $current_site->path;
 178          $current_site->blog_id = $wpdb->get_var( $wpdb->prepare( "SELECT blog_id FROM $wpdb->blogs WHERE domain = %s AND path = %s", $current_site->domain, $current_site->path ) );
 179          $current_site = get_current_site_name( $current_site );
 180          if ( substr( $current_site->domain, 0, 4 ) == 'www.' )
 181              $current_site->cookie_domain = substr( $current_site->domain, 4 );
 182          wp_cache_set( 'current_site', $current_site, 'site-options' );
 183          return $current_site;
 184      }
 185      $path = substr( $_SERVER[ 'REQUEST_URI' ], 0, 1 + strpos( $_SERVER[ 'REQUEST_URI' ], '/', 1 ) );
 186  
 187      if ( $domain == $cookie_domain )
 188          $current_site = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->site WHERE domain = %s AND path = %s", $domain, $path ) );
 189      else
 190          $current_site = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->site WHERE domain IN ( %s, %s ) AND path = %s ORDER BY CHAR_LENGTH( domain ) DESC LIMIT 1", $domain, $cookie_domain, $path ) );
 191  
 192      if ( ! $current_site ) {
 193          if ( $domain == $cookie_domain )
 194              $current_site = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->site WHERE domain = %s AND path='/'", $domain ) );
 195          else
 196              $current_site = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->site WHERE domain IN ( %s, %s ) AND path = '/' ORDER BY CHAR_LENGTH( domain ) DESC LIMIT 1", $domain, $cookie_domain, $path ) );
 197      }
 198  
 199      if ( $current_site ) {
 200          $path = $current_site->path;
 201          $current_site->cookie_domain = $cookie_domain;
 202          return $current_site;
 203      }
 204  
 205      if ( is_subdomain_install() ) {
 206          $sitedomain = substr( $domain, 1 + strpos( $domain, '.' ) );
 207          $current_site = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->site WHERE domain = %s AND path = %s", $sitedomain, $path) );
 208          if ( $current_site ) {
 209              $current_site->cookie_domain = $current_site->domain;
 210              return $current_site;
 211          }
 212  
 213          $current_site = $wpdb->get_row( $wpdb->prepare("SELECT * FROM $wpdb->site WHERE domain = %s AND path='/'", $sitedomain) );
 214      }
 215  
 216      if ( $current_site || defined( 'WP_INSTALLING' ) ) {
 217          $path = '/';
 218          return $current_site;
 219      }
 220  
 221      // Still no dice.
 222      wp_load_translations_early();
 223  
 224      if ( 1 == count( $sites ) )
 225          wp_die( sprintf( __( 'That site does not exist. Please try <a href="%s">%s</a>.' ), 'http://' . $sites[0]->domain . $sites[0]->path ) );
 226      else
 227          wp_die( __( 'No site defined on this host. If you are the owner of this site, please check <a href="http://codex.wordpress.org/Debugging_a_WordPress_Network">Debugging a WordPress Network</a> for help.' ) );
 228  }
 229  
 230  /**
 231   * Displays a failure message.
 232   *
 233   * Used when a blog's tables do not exist. Checks for a missing $wpdb->site table as well.
 234   *
 235   * @access private
 236   * @since 3.0.0
 237   */
 238  function ms_not_installed() {
 239      global $wpdb, $domain, $path;
 240  
 241      wp_load_translations_early();
 242  
 243      $title = __( 'Error establishing a database connection' );
 244      $msg  = '<h1>' . $title . '</h1>';
 245      if ( ! is_admin() )
 246          die( $msg );
 247      $msg .= '<p>' . __( 'If your site does not display, please contact the owner of this network.' ) . '';
 248      $msg .= ' ' . __( 'If you are the owner of this network please check that MySQL is running properly and all tables are error free.' ) . '</p>';
 249      if ( ! $wpdb->get_var( "SHOW TABLES LIKE '$wpdb->site'" ) )
 250          $msg .= '<p>' . sprintf( __( '<strong>Database tables are missing.</strong> This means that MySQL is not running, WordPress was not installed properly, or someone deleted <code>%s</code>. You really should look at your database now.' ), $wpdb->site ) . '</p>';
 251      else
 252          $msg .= '<p>' . sprintf( __( '<strong>Could not find site <code>%1$s</code>.</strong> Searched for table <code>%2$s</code> in database <code>%3$s</code>. Is that right?' ), rtrim( $domain . $path, '/' ), $wpdb->blogs, DB_NAME ) . '</p>';
 253      $msg .= '<p><strong>' . __( 'What do I do now?' ) . '</strong> ';
 254      $msg .= __( 'Read the <a target="_blank" href="http://codex.wordpress.org/Debugging_a_WordPress_Network">bug report</a> page. Some of the guidelines there may help you figure out what went wrong.' );
 255      $msg .= ' ' . __( 'If you&#8217;re still stuck with this message, then check that your database contains the following tables:' ) . '</p><ul>';
 256      foreach ( $wpdb->tables('global') as $t => $table ) {
 257          if ( 'sitecategories' == $t )
 258              continue;
 259          $msg .= '<li>' . $table . '</li>';
 260      }
 261      $msg .= '</ul>';
 262  
 263      wp_die( $msg, $title );
 264  }