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   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      $domain = addslashes( $_SERVER['HTTP_HOST'] );
  26      if ( false !== strpos( $domain, ':' ) ) {
  27          if ( substr( $domain, -3 ) == ':80' ) {
  28              $domain = substr( $domain, 0, -3 );
  29              $_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -3 );
  30          } elseif ( substr( $domain, -4 ) == ':443' ) {
  31              $domain = substr( $domain, 0, -4 );
  32              $_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -4 );
  33          } else {
  34              wp_load_translations_early();
  35              wp_die( __( 'Multisite only works without the port number in the URL.' ) );
  36          }
  37      }
  38  
  39      $domain = rtrim( $domain, '.' );
  40      $cookie_domain = $domain;
  41      if ( substr( $cookie_domain, 0, 4 ) == 'www.' )
  42          $cookie_domain = substr( $cookie_domain, 4 );
  43  
  44      $path = preg_replace( '|([a-z0-9-]+.php.*)|', '', $_SERVER['REQUEST_URI'] );
  45      $path = str_replace ( '/wp-admin/', '/', $path );
  46      $path = preg_replace( '|(/[a-z0-9-]+?/).*|', '$1', $path );
  47  
  48      $current_site = wpmu_current_site();
  49      if ( ! isset( $current_site->blog_id ) )
  50          $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 ) );
  51  
  52      if ( is_subdomain_install() ) {
  53          $current_blog = wp_cache_get( 'current_blog_' . $domain, 'site-options' );
  54          if ( !$current_blog ) {
  55              $current_blog = get_blog_details( array( 'domain' => $domain ), false );
  56              if ( $current_blog )
  57                  wp_cache_set( 'current_blog_' . $domain, $current_blog, 'site-options' );
  58          }
  59          if ( $current_blog && $current_blog->site_id != $current_site->id ) {
  60              $current_site = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->site WHERE id = %d", $current_blog->site_id ) );
  61              if ( ! isset( $current_site->blog_id ) )
  62                  $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 ) );
  63          } else
  64              $blogname = substr( $domain, 0, strpos( $domain, '.' ) );
  65      } else {
  66          $blogname = htmlspecialchars( substr( $_SERVER[ 'REQUEST_URI' ], strlen( $path ) ) );
  67          if ( false !== strpos( $blogname, '/' ) )
  68              $blogname = substr( $blogname, 0, strpos( $blogname, '/' ) );
  69          if ( false !== strpos( $blogname, '?' ) )
  70              $blogname = substr( $blogname, 0, strpos( $blogname, '?' ) );
  71          $reserved_blognames = array( 'page', 'comments', 'blog', 'wp-admin', 'wp-includes', 'wp-content', 'files', 'feed' );
  72          if ( $blogname != '' && ! in_array( $blogname, $reserved_blognames ) && ! is_file( $blogname ) )
  73              $path .= $blogname . '/';
  74          $current_blog = wp_cache_get( 'current_blog_' . $domain . $path, 'site-options' );
  75          if ( ! $current_blog ) {
  76              $current_blog = get_blog_details( array( 'domain' => $domain, 'path' => $path ), false );
  77              if ( $current_blog )
  78                  wp_cache_set( 'current_blog_' . $domain . $path, $current_blog, 'site-options' );
  79          }
  80          unset($reserved_blognames);
  81      }
  82  
  83      if ( ! defined( 'WP_INSTALLING' ) && is_subdomain_install() && ! is_object( $current_blog ) ) {
  84          if ( defined( 'NOBLOGREDIRECT' ) ) {
  85              $destination = NOBLOGREDIRECT;
  86              if ( '%siteurl%' == $destination )
  87                  $destination = "http://" . $current_site->domain . $current_site->path;
  88          } else {
  89              $destination = 'http://' . $current_site->domain . $current_site->path . 'wp-signup.php?new=' . str_replace( '.' . $current_site->domain, '', $domain );
  90          }
  91          header( 'Location: ' . $destination );
  92          die();
  93      }
  94  
  95      if ( ! defined( 'WP_INSTALLING' ) ) {
  96          if ( $current_site && ! $current_blog ) {
  97              if ( $current_site->domain != $_SERVER[ 'HTTP_HOST' ] ) {
  98                  header( 'Location: http://' . $current_site->domain . $current_site->path );
  99                  exit;
 100              }
 101              $current_blog = get_blog_details( array( 'domain' => $current_site->domain, 'path' => $current_site->path ), false );
 102          }
 103          if ( ! $current_blog || ! $current_site )
 104              ms_not_installed();
 105      }
 106  
 107      $blog_id = $current_blog->blog_id;
 108      $public  = $current_blog->public;
 109  
 110      if ( empty( $current_blog->site_id ) )
 111          $current_blog->site_id = 1;
 112      $site_id = $current_blog->site_id;
 113  
 114      $current_site = get_current_site_name( $current_site );
 115  
 116      if ( ! $blog_id ) {
 117          if ( defined( 'WP_INSTALLING' ) ) {
 118              $current_blog->blog_id = $blog_id = 1;
 119          } else {
 120              wp_load_translations_early();
 121              $msg = ! $wpdb->get_var( "SHOW TABLES LIKE '$wpdb->site'" ) ? ' ' . __( 'Database tables are missing.' ) : '';
 122              wp_die( __( 'No site by that name on this system.' ) . $msg );
 123          }
 124      }
 125  }
 126  $wpdb->set_prefix( $table_prefix, false ); // $table_prefix can be set in sunrise.php
 127  $wpdb->set_blog_id( $current_blog->blog_id, $current_blog->site_id );
 128  $table_prefix = $wpdb->get_blog_prefix();
 129  $_wp_switched_stack = array();
 130  $switched = false;
 131  
 132  // need to init cache again after blog_id is set
 133  wp_start_object_cache();
 134  
 135  // Define upload directory constants
 136  ms_upload_constants();