<?php

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/**

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* These functions are needed to load Multisite.

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*

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* @since 3.0.0

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*

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* @package WordPress

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* @subpackage Multisite

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*/

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/**

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* Whether a subdomain configuration is enabled.

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*

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* @since 3.0.0

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*

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* @return bool True if subdomain configuration is enabled, false otherwise.

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*/

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function is_subdomain_install() {

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if ( defined( 'SUBDOMAIN_INSTALL' ) ) {

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return SUBDOMAIN_INSTALL;

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}

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return ( defined( 'VHOST' ) && 'yes' === VHOST );

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}

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/**

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* Returns array of network plugin files to be included in global scope.

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*

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* The default directory is wp-content/plugins. To change the default directory

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* manually, define `WP_PLUGIN_DIR` and `WP_PLUGIN_URL` in `wp-config.php`.

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*

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* @access private

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* @since 3.1.0

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*

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* @return string[] Array of absolute paths to files to include.

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*/

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function wp_get_active_network_plugins() {

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$active_plugins = (array) get_site_option( 'active_sitewide_plugins', array() );

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if ( empty( $active_plugins ) ) {

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return array();

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}

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$plugins = array();

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$active_plugins = array_keys( $active_plugins );

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sort( $active_plugins );

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foreach ( $active_plugins as $plugin ) {

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if ( ! validate_file( $plugin ) // $plugin must validate as file.

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&& '.php' === substr( $plugin, -4 ) // $plugin must end with '.php'.

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&& file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist.

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) {

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$plugins[] = WP_PLUGIN_DIR . '/' . $plugin;

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}

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}

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return $plugins;

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}

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/**

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* Checks status of current blog.

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*

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* Checks if the blog is deleted, inactive, archived, or spammed.

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*

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* Dies with a default message if the blog does not pass the check.

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*

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* To change the default message when a blog does not pass the check,

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* use the wp-content/blog-deleted.php, blog-inactive.php and

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* blog-suspended.php drop-ins.

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*

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* @since 3.0.0

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*

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* @return true|string Returns true on success, or drop-in file to include.

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*/

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function ms_site_check() {

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/**

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* Filters checking the status of the current blog.

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*

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* @since 3.0.0

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*

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* @param bool|null $check Whether to skip the blog status check. Default null.

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*/

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$check = apply_filters( 'ms_site_check', null );

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if ( null !== $check ) {

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return true;

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}

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// Allow super admins to see blocked sites.

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if ( is_super_admin() ) {

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return true;

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}

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$blog = get_site();

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if ( '1' == $blog->deleted ) {

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if ( file_exists( WP_CONTENT_DIR . '/blog-deleted.php' ) ) {

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return WP_CONTENT_DIR . '/blog-deleted.php';

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} else {

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wp_die( __( 'This site is no longer available.' ), '', array( 'response' => 410 ) );

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}

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}

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if ( '2' == $blog->deleted ) {

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if ( file_exists( WP_CONTENT_DIR . '/blog-inactive.php' ) ) {

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return WP_CONTENT_DIR . '/blog-inactive.php';

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} else {

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$admin_email = str_replace( '@', ' AT ', get_site_option( 'admin_email', 'support@' . get_network()->domain ) );

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wp_die(

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sprintf(

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/* translators: %s: Admin email link. */

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__( 'This site has not been activated yet. If you are having problems activating your site, please contact %s.' ),

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sprintf( '<a href="mailto:%1$s">%1$s</a>', $admin_email )

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)

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);

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}

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}

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if ( '1' == $blog->archived || '1' == $blog->spam ) {

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if ( file_exists( WP_CONTENT_DIR . '/blog-suspended.php' ) ) {

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return WP_CONTENT_DIR . '/blog-suspended.php';

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} else {

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wp_die( __( 'This site has been archived or suspended.' ), '', array( 'response' => 410 ) );

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}

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}

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return true;

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}

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/**

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* Retrieve the closest matching network for a domain and path.

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*

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* @since 3.9.0

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*

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* @internal In 4.4.0, converted to a wrapper for WP_Network::get_by_path()

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*

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* @param string $domain Domain to check.

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* @param string $path Path to check.

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* @param int|null $segments Path segments to use. Defaults to null, or the full path.

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* @return WP_Network|false Network object if successful. False when no network is found.

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*/

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function get_network_by_path( $domain, $path, $segments = null ) {

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return WP_Network::get_by_path( $domain, $path, $segments );

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}

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/**

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* Retrieves the closest matching site object by its domain and path.

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*

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* This will not necessarily return an exact match for a domain and path. Instead, it

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* breaks the domain and path into pieces that are then used to match the closest

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* possibility from a query.

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*

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* The intent of this method is to match a site object during bootstrap for a

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* requested site address

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*

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* @since 3.9.0

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* @since 4.7.0 Updated to always return a `WP_Site` object.

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*

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* @param string $domain Domain to check.

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* @param string $path Path to check.

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* @param int|null $segments Path segments to use. Defaults to null, or the full path.

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* @return WP_Site|false Site object if successful. False when no site is found.

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*/

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function get_site_by_path( $domain, $path, $segments = null ) {

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$path_segments = array_filter( explode( '/', trim( $path, '/' ) ) );

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/**

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* Filters the number of path segments to consider when searching for a site.

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*

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* @since 3.9.0

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*

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* @param int|null $segments The number of path segments to consider. WordPress by default looks at

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* one path segment following the network path. The function default of

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* null only makes sense when you know the requested path should match a site.

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* @param string $domain The requested domain.

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* @param string $path The requested path, in full.

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*/

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$segments = apply_filters( 'site_by_path_segments_count', $segments, $domain, $path );

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if ( null !== $segments && count( $path_segments ) > $segments ) {

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$path_segments = array_slice( $path_segments, 0, $segments );

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}

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$paths = array();

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while ( count( $path_segments ) ) {

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$paths[] = '/' . implode( '/', $path_segments ) . '/';

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array_pop( $path_segments );

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}

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$paths[] = '/';

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/**

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* Determine a site by its domain and path.

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*

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* This allows one to short-circuit the default logic, perhaps by

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* replacing it with a routine that is more optimal for your setup.

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*

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* Return null to avoid the short-circuit. Return false if no site

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* can be found at the requested domain and path. Otherwise, return

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* a site object.

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*

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* @since 3.9.0

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*

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* @param null|false|WP_Site $site Site value to return by path. Default null

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* to continue retrieving the site.

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* @param string $domain The requested domain.

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* @param string $path The requested path, in full.

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* @param int|null $segments The suggested number of paths to consult.

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* Default null, meaning the entire path was to be consulted.

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* @param string[] $paths The paths to search for, based on $path and $segments.

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*/

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$pre = apply_filters( 'pre_get_site_by_path', null, $domain, $path, $segments, $paths );

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if ( null !== $pre ) {

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if ( false !== $pre && ! $pre instanceof WP_Site ) {

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$pre = new WP_Site( $pre );

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}

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return $pre;

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}

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/*

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* @todo

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* Caching, etc. Consider alternative optimization routes,

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* perhaps as an opt-in for plugins, rather than using the pre_* filter.

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* For example: The segments filter can expand or ignore paths.

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* If persistent caching is enabled, we could query the DB for a path <> '/'

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* then cache whether we can just always ignore paths.

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*/

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// Either www or non-www is supported, not both. If a www domain is requested,

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// query for both to provide the proper redirect.

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$domains = array( $domain );

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if ( 'www.' === substr( $domain, 0, 4 ) ) {

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$domains[] = substr( $domain, 4 );

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}

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$args = array(

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'number' => 1,

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'update_site_meta_cache' => false,

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);

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if ( count( $domains ) > 1 ) {

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$args['domain__in'] = $domains;

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$args['orderby']['domain_length'] = 'DESC';

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} else {

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$args['domain'] = array_shift( $domains );

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}

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if ( count( $paths ) > 1 ) {

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$args['path__in'] = $paths;

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$args['orderby']['path_length'] = 'DESC';

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} else {

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$args['path'] = array_shift( $paths );

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}

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$result = get_sites( $args );

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$site = array_shift( $result );

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if ( $site ) {

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return $site;

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}

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return false;

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}

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/**

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* Identifies the network and site of a requested domain and path and populates the

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* corresponding network and site global objects as part of the multisite bootstrap process.

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*

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* Prior to 4.6.0, this was a procedural block in `ms-settings.php`. It was wrapped into

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* a function to facilitate unit tests. It should not be used outside of core.

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*

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* Usually, it's easier to query the site first, which then declares its network.

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* In limited situations, we either can or must find the network first.

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*

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* If a network and site are found, a `true` response will be returned so that the

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* request can continue.

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*

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* If neither a network or site is found, `false` or a URL string will be returned

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* so that either an error can be shown or a redirect can occur.

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*

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* @since 4.6.0

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* @access private

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*

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* @global WP_Network $current_site The current network.

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* @global WP_Site $current_blog The current site.

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*

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* @param string $domain The requested domain.

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* @param string $path The requested path.

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* @param bool $subdomain Optional. Whether a subdomain (true) or subdirectory (false) configuration.

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* Default false.

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* @return bool|string True if bootstrap successfully populated `$current_blog` and `$current_site`.

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* False if bootstrap could not be properly completed.

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* Redirect URL if parts exist, but the request as a whole can not be fulfilled.

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*/

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function ms_load_current_site_and_network( $domain, $path, $subdomain = false ) {

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global $current_site, $current_blog;

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// If the network is defined in wp-config.php, we can simply use that.

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if ( defined( 'DOMAIN_CURRENT_SITE' ) && defined( 'PATH_CURRENT_SITE' ) ) {

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$current_site = new stdClass;

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$current_site->id = defined( 'SITE_ID_CURRENT_SITE' ) ? SITE_ID_CURRENT_SITE : 1;

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$current_site->domain = DOMAIN_CURRENT_SITE;

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$current_site->path = PATH_CURRENT_SITE;

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if ( defined( 'BLOG_ID_CURRENT_SITE' ) ) {

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$current_site->blog_id = BLOG_ID_CURRENT_SITE;

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} elseif ( defined( 'BLOGID_CURRENT_SITE' ) ) { // Deprecated.

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$current_site->blog_id = BLOGID_CURRENT_SITE;

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}

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if ( 0 === strcasecmp( $current_site->domain, $domain ) && 0 === strcasecmp( $current_site->path, $path ) ) {

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$current_blog = get_site_by_path( $domain, $path );

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} elseif ( '/' !== $current_site->path && 0 === strcasecmp( $current_site->domain, $domain ) && 0 === stripos( $path, $current_site->path ) ) {

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// If the current network has a path and also matches the domain and path of the request,

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// we need to look for a site using the first path segment following the network's path.

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$current_blog = get_site_by_path( $domain, $path, 1 + count( explode( '/', trim( $current_site->path, '/' ) ) ) );

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} else {

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// Otherwise, use the first path segment (as usual).

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$current_blog = get_site_by_path( $domain, $path, 1 );

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}

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} elseif ( ! $subdomain ) {

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/*

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* A "subdomain" installation can be re-interpreted to mean "can support any domain".

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* If we're not dealing with one of these installations, then the important part is determining

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* the network first, because we need the network's path to identify any sites.

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*/

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$current_site = wp_cache_get( 'current_network', 'site-options' );

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if ( ! $current_site ) {

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// Are there even two networks installed?

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$networks = get_networks( array( 'number' => 2 ) );

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if ( count( $networks ) === 1 ) {

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$current_site = array_shift( $networks );

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wp_cache_add( 'current_network', $current_site, 'site-options' );

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} elseif ( empty( $networks ) ) {

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// A network not found hook should fire here.

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return false;

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}

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}

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if ( empty( $current_site ) ) {

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$current_site = WP_Network::get_by_path( $domain, $path, 1 );

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}

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if ( empty( $current_site ) ) {

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/**

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* Fires when a network cannot be found based on the requested domain and path.

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*

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* At the time of this action, the only recourse is to redirect somewhere

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* and exit. If you want to declare a particular network, do so earlier.

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*

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* @since 4.4.0

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*

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* @param string $domain The domain used to search for a network.

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* @param string $path The path used to search for a path.

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*/

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do_action( 'ms_network_not_found', $domain, $path );

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return false;

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} elseif ( $path === $current_site->path ) {

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$current_blog = get_site_by_path( $domain, $path );

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} else {

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// Search the network path + one more path segment (on top of the network path).

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$current_blog = get_site_by_path( $domain, $path, substr_count( $current_site->path, '/' ) );

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}

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} else {

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// Find the site by the domain and at most the first path segment.

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$current_blog = get_site_by_path( $domain, $path, 1 );

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if ( $current_blog ) {

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$current_site = WP_Network::get_instance( $current_blog->site_id ? $current_blog->site_id : 1 );

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} else {

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// If you don't have a site with the same domain/path as a network, you're pretty screwed, but:

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$current_site = WP_Network::get_by_path( $domain, $path, 1 );

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}

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}

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// The network declared by the site trumps any constants.

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if ( $current_blog && $current_blog->site_id != $current_site->id ) {

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$current_site = WP_Network::get_instance( $current_blog->site_id );

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}

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// No network has been found, bail.

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if ( empty( $current_site ) ) {

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/** This action is documented in wp-includes/ms-settings.php */

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do_action( 'ms_network_not_found', $domain, $path );

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return false;

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}

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// During activation of a new subdomain, the requested site does not yet exist.

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if ( empty( $current_blog ) && wp_installing() ) {

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$current_blog = new stdClass;

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$current_blog->blog_id = 1;

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$blog_id = 1;

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$current_blog->public = 1;

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}

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// No site has been found, bail.

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if ( empty( $current_blog ) ) {

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// We're going to redirect to the network URL, with some possible modifications.

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$scheme = is_ssl() ? 'https' : 'http';

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$destination = "$scheme://{$current_site->domain}{$current_site->path}";

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/**

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* Fires when a network can be determined but a site cannot.

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*

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* At the time of this action, the only recourse is to redirect somewhere

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* and exit. If you want to declare a particular site, do so earlier.

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*

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* @since 3.9.0

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*

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* @param WP_Network $current_site The network that had been determined.

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* @param string $domain The domain used to search for a site.

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* @param string $path The path used to search for a site.

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*/

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do_action( 'ms_site_not_found', $current_site, $domain, $path );

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if ( $subdomain && ! defined( 'NOBLOGREDIRECT' ) ) {

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// For a "subdomain" installation, redirect to the signup form specifically.

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$destination .= 'wp-signup.php?new=' . str_replace( '.' . $current_site->domain, '', $domain );

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} elseif ( $subdomain ) {

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/*

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* For a "subdomain" installation, the NOBLOGREDIRECT constant

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* can be used to avoid a redirect to the signup form.

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* Using the ms_site_not_found action is preferred to the constant.

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*/

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if ( '%siteurl%' !== NOBLOGREDIRECT ) {

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$destination = NOBLOGREDIRECT;

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}

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} elseif ( 0 === strcasecmp( $current_site->domain, $domain ) ) {

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/*

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* If the domain we were searching for matches the network's domain,

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* it's no use redirecting back to ourselves -- it'll cause a loop.

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* As we couldn't find a site, we're simply not installed.

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*/

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return false;

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}

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return $destination;

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}

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// Figure out the current network's main site.

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if ( empty( $current_site->blog_id ) ) {

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$current_site->blog_id = get_main_site_id( $current_site->id );

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}

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[443] Fix | Delete

return true;

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}

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[446] Fix | Delete

/**

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* Displays a failure message.

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*

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* Used when a blog's tables do not exist. Checks for a missing $wpdb->site table as well.

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*

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* @access private

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* @since 3.0.0

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* @since 4.4.0 The `$domain` and `$path` parameters were added.

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*

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* @global wpdb $wpdb WordPress database abstraction object.

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*

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* @param string $domain The requested domain for the error to reference.

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* @param string $path The requested path for the error to reference.

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*/

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function ms_not_installed( $domain, $path ) {

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global $wpdb;

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if ( ! is_admin() ) {

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dead_db();

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}

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[467] Fix | Delete

wp_load_translations_early();

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[469] Fix | Delete

$title = __( 'Error establishing a database connection' );

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$msg = '<h1>' . $title . '</h1>';

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$msg .= '<p>' . __( 'If your site does not display, please contact the owner of this network.' ) . '';

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$msg .= ' ' . __( 'If you are the owner of this network please check that MySQL is running properly and all tables are error free.' ) . '</p>';

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$query = $wpdb->prepare( 'SHOW TABLES LIKE %s', $wpdb->esc_like( $wpdb->site ) );

[475] Fix | Delete

if ( ! $wpdb->get_var( $query ) ) {

[476] Fix | Delete

$msg .= '<p>' . sprintf(

[477] Fix | Delete

/* translators: %s: Table name. */

[478] Fix | Delete

__( '<strong>Database tables are missing.</strong> This means that MySQL is not running, WordPress was not installed properly, or someone deleted %s. You really should look at your database now.' ),

[479] Fix | Delete

'<code>' . $wpdb->site . '</code>'

[480] Fix | Delete

) . '</p>';

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} else {

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$msg .= '<p>' . sprintf(

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/* translators: 1: Site URL, 2: Table name, 3: Database name. */

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__( '<strong>Could not find site %1$s.</strong> Searched for table %2$s in database %3$s. Is that right?' ),

[485] Fix | Delete

'<code>' . rtrim( $domain . $path, '/' ) . '</code>',

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'<code>' . $wpdb->blogs . '</code>',

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'<code>' . DB_NAME . '</code>'

[488] Fix | Delete

) . '</p>';

[489] Fix | Delete

}

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$msg .= '<p><strong>' . __( 'What do I do now?' ) . '</strong> ';

[491] Fix | Delete

$msg .= sprintf(

[492] Fix | Delete

/* translators: %s: Documentation URL. */

[493] Fix | Delete

__( 'Read the <a href="%s" target="_blank">Debugging a WordPress Network</a> article. Some of the suggestions there may help you figure out what went wrong.' ),

[494] Fix | Delete

__( 'https://wordpress.org/support/article/debugging-a-wordpress-network/' )

[495] Fix | Delete

);

[496] Fix | Delete

$msg .= ' ' . __( 'If you&#8217;re still stuck with this message, then check that your database contains the following tables:' ) . '</p><ul>';

[497] Fix | Delete

foreach ( $wpdb->tables( 'global' ) as $t => $table ) {

[498] Fix | Delete

if ( 'sitecategories' === $t ) {

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