Ticket #14873: ms-settings.php

<?php
/**
 * Used to set up and fix common variables and include
 * the Multisite procedural and class library.
 *
 * Allows for some configuration in wp-config.php (see ms-default-constants.php)
 *
 * @package WordPress
 * @subpackage Multisite
 * @since 3.0.0
 */

// $base sanity check.
if ( 'BASE' == $base )
        die( /*WP_I18N_BASE_ERROR*/'Configuration error in <code>wp-config.php</code>. <code>$base</code> is set to <code>BASE</code> when it should be like <code>/</code> or <code>/blogs/</code>.'/*/WP_I18N_BASE_ERROR*/ );

/** Include Multisite initialization functions */
require( ABSPATH . WPINC . '/ms-load.php' );
require( ABSPATH . WPINC . '/ms-default-constants.php' );

if ( defined( 'SUNRISE' ) )
        include_once( WP_CONTENT_DIR . '/sunrise.php' );

/** Check for and define SUBDOMAIN_INSTALL and the deprecated VHOST constant. */
ms_subdomain_constants();

if ( !isset( $current_site ) || !isset( $current_blog ) ) {

        $domain = addslashes( $_SERVER['HTTP_HOST'] );
        if ( false !== strpos( $domain, ':' ) ) {
                if ( substr( $domain, -3 ) == ':80' ) {
                        $domain = substr( $domain, 0, -3 );
                        $_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -3 );
                } elseif ( substr( $domain, -4 ) == ':443' ) {
                        $domain = substr( $domain, 0, -4 );
                        $_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -4 );
                } else {
                        wp_die( /*WP_I18N_NO_PORT_NUMBER*/'Multisite only works without the port number in the URL.'/*/WP_I18N_NO_PORT_NUMBER*/ );
                }
        }

        $domain = rtrim( $domain, '.' );
        $cookie_domain = $domain;
        if ( substr( $cookie_domain, 0, 4 ) == 'www.' )
                $cookie_domain = substr( $cookie_domain, 4 );

        $path = preg_replace( '|([a-z0-9-]+.php.*)|', '', $_SERVER['REQUEST_URI'] );
        $path = str_replace ( '/wp-admin/', '/', $path );
        $path = preg_replace( '|(/[a-z0-9-]+?/).*|', '$1', $path );

        $current_site = wpmu_current_site();
        if ( ! isset( $current_site->blog_id ) )
                $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 ) );

        if ( is_subdomain_install() ) {
                $current_blog = wp_cache_get( 'current_blog_' . $domain, 'site-options' );
                if ( !$current_blog ) {
                        $current_blog = get_blog_details( array( 'domain' => $domain ), false );
                        if ( $current_blog )
                                wp_cache_set( 'current_blog_' . $domain, $current_blog, 'site-options' );
                }
                if ( $current_blog && $current_blog->site_id != $current_site->id )
                        $current_site = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->site WHERE id = %d", $current_blog->site_id ) );
                else
                        $blogname = substr( $domain, 0, strpos( $domain, '.' ) );
        } else {
                $blogname = htmlspecialchars( substr( $_SERVER[ 'REQUEST_URI' ], strlen( $path ) ) );
                if ( false !== strpos( $blogname, '/' ) )
                        $blogname = substr( $blogname, 0, strpos( $blogname, '/' ) );
                if ( false !== strpos( $blogname, '?' ) )
                        $blogname = substr( $blogname, 0, strpos( $blogname, '?' ) );
                $reserved_blognames = array( 'page', 'comments', 'blog', 'wp-admin', 'wp-includes', 'wp-content', 'files', 'feed' );
                if ( $blogname != '' && ! in_array( $blogname, $reserved_blognames ) && ! is_file( $blogname ) )
                        $path .= $blogname . '/';
                $current_blog = wp_cache_get( 'current_blog_' . $domain . $path, 'site-options' );
                if ( ! $current_blog ) {
                        $current_blog = get_blog_details( array( 'domain' => $domain, 'path' => $path ), false );
                        if ( $current_blog )
                                wp_cache_set( 'current_blog_' . $domain . $path, $current_blog, 'site-options' );
                }
        }

        $protocol = is_ssl() ? 'https://' : 'http://';

        if ( ! defined( 'WP_INSTALLING' ) && is_subdomain_install() && ! is_object( $current_blog ) ) {
                if ( defined( 'NOBLOGREDIRECT' ) ) {
                        $destination = NOBLOGREDIRECT;
                        if ( '%siteurl%' == $destination )
                                $destination = $protocol . $current_site->domain . $current_site->path;
                } else {
                        $destination = $protocol . $current_site->domain . $current_site->path . 'wp-signup.php?new=' . str_replace( '.' . $current_site->domain, '', $domain );
                }
                header( 'Location: ' . $destination );
                die();
        }

        if ( ! defined( 'WP_INSTALLING' ) ) {
                if ( $current_site && ! $current_blog ) {
                        if ( $current_site->domain != $_SERVER[ 'HTTP_HOST' ] ) {
                                header( 'Location: ' . $protocol . $current_site->domain . $current_site->path );
                                exit;
                        }
                        $current_blog = get_blog_details( array( 'domain' => $current_site->domain, 'path' => $current_site->path ), false );
                }
                if ( ! $current_blog || ! $current_site )
                        ms_not_installed();
        }

        $blog_id = $current_blog->blog_id;
        $public  = $current_blog->public;

        if ( empty( $current_blog->site_id ) )
                $current_blog->site_id = 1;
        $site_id = $current_blog->site_id;

        $current_site = get_current_site_name( $current_site );

        if ( ! $blog_id ) {
                if ( defined( 'WP_INSTALLING' ) ) {
                        $current_blog->blog_id = $blog_id = 1;
                } else {
                        $msg = ! $wpdb->get_var( "SHOW TABLES LIKE '$wpdb->site'" ) ? ' ' . /*WP_I18N_TABLES_MISSING*/'Database tables are missing.'/*/WP_I18N_TABLES_MISSING*/ : '';
                        wp_die( /*WP_I18N_NO_BLOG*/'No site by that name on this system.'/*/WP_I18N_NO_BLOG*/ . $msg );
                }
        }
}
$wpdb->set_prefix( $table_prefix, false ); // $table_prefix can be set in sunrise.php
$wpdb->set_blog_id( $current_blog->blog_id, $current_blog->site_id );
$table_prefix = $wpdb->get_blog_prefix();

// need to init cache again after blog_id is set
wp_start_object_cache();

// Define upload directory constants
ms_upload_constants();