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// Don't load directly.
 14if ( ! defined( 'ABSPATH' ) ) {
 15	die( '-1' );
 16}
 17
 18/**
 19 * Objects representing the current network and current site.
 20 *
 21 * These may be populated through a custom `sunrise.php`. If not, then this
 22 * file will attempt to populate them based on the current request.
 23 *
 24 * @since 3.0.0
 25 *
 26 * @global WP_Network $current_site The current network.
 27 * @global object     $current_blog The current site.
 28 * @global string     $domain       Deprecated. The domain of the site found on load.
 29 *                                  Use `get_site()->domain` instead.
 30 * @global string     $path         Deprecated. The path of the site found on load.
 31 *                                  Use `get_site()->path` instead.
 32 * @global int        $site_id      Deprecated. The ID of the network found on load.
 33 *                                  Use `get_current_network_id()` instead.
 34 * @global bool       $public       Deprecated. Whether the site found on load is public.
 35 *                                  Use `get_site()->public` instead.
 36 */
 37global $current_site, $current_blog, $domain, $path, $site_id, $public;
 38
 39/** WP_Network class */
 40require_once ABSPATH . WPINC . '/class-wp-network.php';
 41
 42/** WP_Site class */
 43require_once ABSPATH . WPINC . '/class-wp-site.php';
 44
 45/** Multisite loader */
 46require_once ABSPATH . WPINC . '/ms-load.php';
 47
 48/** Default Multisite constants */
 49require_once ABSPATH . WPINC . '/ms-default-constants.php';
 50
 51if ( defined( 'SUNRISE' ) ) {
 52	include_once WP_CONTENT_DIR . '/sunrise.php';
 53}
 54
 55/** Check for and define SUBDOMAIN_INSTALL and the deprecated VHOST constant. */
 56ms_subdomain_constants();
 57
 58// This block will process a request if the current network or current site objects
 59// have not been populated in the global scope through something like `sunrise.php`.
 60if ( ! isset( $current_site ) || ! isset( $current_blog ) ) {
 61
 62	$domain = strtolower( stripslashes( $_SERVER['HTTP_HOST'] ?? '' ) );
 63	if ( str_ends_with( $domain, ':80' ) ) {
 64		$domain               = substr( $domain, 0, -3 );
 65		$_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -3 );
 66	} elseif ( str_ends_with( $domain, ':443' ) ) {
 67		$domain               = substr( $domain, 0, -4 );
 68		$_SERVER['HTTP_HOST'] = substr( $_SERVER['HTTP_HOST'], 0, -4 );
 69	}
 70
 71	$path = stripslashes( $_SERVER['REQUEST_URI'] );
 72	if ( is_admin() ) {
 73		$path = preg_replace( '#(.*)/wp-admin/.*#', '$1/', $path );
 74	}
 75	list( $path ) = explode( '?', $path );
 76
 77	$bootstrap_result = ms_load_current_site_and_network( $domain, $path, is_subdomain_install() );
 78
 79	if ( true === $bootstrap_result ) {
 80		// `$current_blog` and `$current_site` are now populated.
 81	} elseif ( false === $bootstrap_result ) {
 82		ms_not_installed( $domain, $path );
 83	} else {
 84		header( 'Location: ' . $bootstrap_result );
 85		exit;
 86	}
 87	unset( $bootstrap_result );
 88
 89	$blog_id = $current_blog->blog_id;
 90	$public  = $current_blog->public;
 91
 92	if ( empty( $current_blog->site_id ) ) {
 93		// This dates to [MU134] and shouldn't be relevant anymore,
 94		// but it could be possible for arguments passed to insert_blog() etc.
 95		$current_blog->site_id = 1;
 96	}
 97
 98	$site_id = $current_blog->site_id;
 99	wp_load_core_site_options( $site_id );
100}
101
102$wpdb->set_prefix( $table_prefix, false ); // $table_prefix can be set in sunrise.php.
103$wpdb->set_blog_id( $current_blog->blog_id, $current_blog->site_id );
104$table_prefix       = $wpdb->get_blog_prefix();
105$_wp_switched_stack = array();
106$switched           = false;
107
108// Need to init cache again after blog_id is set.
109wp_start_object_cache();
110
111if ( ! $current_site instanceof WP_Network ) {
112	$current_site = new WP_Network( $current_site );
113}
114
115if ( ! $current_blog instanceof WP_Site ) {
116	$current_blog = new WP_Site( $current_blog );
117}
118
119// Define upload directory constants.
120ms_upload_constants();
121
122/**
123 * Fires after the current site and network have been detected and loaded
124 * in multisite's bootstrap.
125 *
126 * @since 4.6.0
127 */
128do_action( 'ms_loaded' );
129