www.gusucode.com > wordpress PHP博客系统英文版 v4.5.1PHP源码程序 > wordpress PHP博客系统英文版 v4.5.1/wordpress/wordpress/wp-includes/ms-load.php
<?php
/**
* These functions are needed to load Multisite.
*
* @since 3.0.0
*
* @package WordPress
* @subpackage Multisite
*/
/**
* Whether a subdomain configuration is enabled.
*
* @since 3.0.0
*
* @return bool True if subdomain configuration is enabled, false otherwise.
*/
function is_subdomain_install() {
if ( defined('SUBDOMAIN_INSTALL') )
return SUBDOMAIN_INSTALL;
return ( defined( 'VHOST' ) && VHOST == 'yes' );
}
/**
* Returns array of network plugin files to be included in global scope.
*
* The default directory is wp-content/plugins. To change the default directory
* manually, define `WP_PLUGIN_DIR` and `WP_PLUGIN_URL` in `wp-config.php`.
*
* @access private
* @since 3.1.0
*
* @return array Files to include.
*/
function wp_get_active_network_plugins() {
$active_plugins = (array) get_site_option( 'active_sitewide_plugins', array() );
if ( empty( $active_plugins ) )
return array();
$plugins = array();
$active_plugins = array_keys( $active_plugins );
sort( $active_plugins );
foreach ( $active_plugins as $plugin ) {
if ( ! validate_file( $plugin ) // $plugin must validate as file
&& '.php' == substr( $plugin, -4 ) // $plugin must end with '.php'
&& file_exists( WP_PLUGIN_DIR . '/' . $plugin ) // $plugin must exist
)
$plugins[] = WP_PLUGIN_DIR . '/' . $plugin;
}
return $plugins;
}
/**
* Checks status of current blog.
*
* Checks if the blog is deleted, inactive, archived, or spammed.
*
* Dies with a default message if the blog does not pass the check.
*
* To change the default message when a blog does not pass the check,
* use the wp-content/blog-deleted.php, blog-inactive.php and
* blog-suspended.php drop-ins.
*
* @since 3.0.0
*
* @return true|string Returns true on success, or drop-in file to include.
*/
function ms_site_check() {
$blog = get_blog_details();
/**
* Filter checking the status of the current blog.
*
* @since 3.0.0
*
* @param bool null Whether to skip the blog status check. Default null.
*/
$check = apply_filters( 'ms_site_check', null );
if ( null !== $check )
return true;
// Allow super admins to see blocked sites
if ( is_super_admin() )
return true;
if ( '1' == $blog->deleted ) {
if ( file_exists( WP_CONTENT_DIR . '/blog-deleted.php' ) )
return WP_CONTENT_DIR . '/blog-deleted.php';
else
wp_die( __( 'This site is no longer available.' ), '', array( 'response' => 410 ) );
}
if ( '2' == $blog->deleted ) {
if ( file_exists( WP_CONTENT_DIR . '/blog-inactive.php' ) ) {
return WP_CONTENT_DIR . '/blog-inactive.php';
} else {
$admin_email = str_replace( '@', ' AT ', get_site_option( 'admin_email', 'support@' . get_current_site()->domain ) );
wp_die(
/* translators: %s: admin email link */
sprintf( __( 'This site has not been activated yet. If you are having problems activating your site, please contact %s.' ),
sprintf( '<a href="mailto:%s">%s</a>', $admin_email )
)
);
}
}
if ( $blog->archived == '1' || $blog->spam == '1' ) {
if ( file_exists( WP_CONTENT_DIR . '/blog-suspended.php' ) )
return WP_CONTENT_DIR . '/blog-suspended.php';
else
wp_die( __( 'This site has been archived or suspended.' ), '', array( 'response' => 410 ) );
}
return true;
}
/**
* Retrieve the closest matching network for a domain and path.
*
* @since 3.9.0
* @since 4.4.0 Converted to a wrapper for WP_Network::get_by_path()
*
* @param string $domain Domain to check.
* @param string $path Path to check.
* @param int|null $segments Path segments to use. Defaults to null, or the full path.
* @return WP_Network|false Network object if successful. False when no network is found.
*/
function get_network_by_path( $domain, $path, $segments = null ) {
return WP_Network::get_by_path( $domain, $path, $segments );
}
/**
* Retrieve an object containing information about the requested network.
*
* @since 3.9.0
* @since 4.4.0 Converted to leverage WP_Network
*
* @param object|int $network The network's database row or ID.
* @return WP_Network|false Object containing network information if found, false if not.
*/
function wp_get_network( $network ) {
if ( ! is_object( $network ) ) {
$network = WP_Network::get_instance( $network );
} else {
$network = new WP_Network( $network );
}
return $network;
}
/**
* Retrieve a site object by its domain and path.
*
* @since 3.9.0
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $domain Domain to check.
* @param string $path Path to check.
* @param int|null $segments Path segments to use. Defaults to null, or the full path.
* @return object|false Site object if successful. False when no site is found.
*/
function get_site_by_path( $domain, $path, $segments = null ) {
global $wpdb;
$path_segments = array_filter( explode( '/', trim( $path, '/' ) ) );
/**
* Filter the number of path segments to consider when searching for a site.
*
* @since 3.9.0
*
* @param int|null $segments The number of path segments to consider. WordPress by default looks at
* one path segment following the network path. The function default of
* null only makes sense when you know the requested path should match a site.
* @param string $domain The requested domain.
* @param string $path The requested path, in full.
*/
$segments = apply_filters( 'site_by_path_segments_count', $segments, $domain, $path );
if ( null !== $segments && count( $path_segments ) > $segments ) {
$path_segments = array_slice( $path_segments, 0, $segments );
}
$paths = array();
while ( count( $path_segments ) ) {
$paths[] = '/' . implode( '/', $path_segments ) . '/';
array_pop( $path_segments );
}
$paths[] = '/';
/**
* Determine a site by its domain and path.
*
* This allows one to short-circuit the default logic, perhaps by
* replacing it with a routine that is more optimal for your setup.
*
* Return null to avoid the short-circuit. Return false if no site
* can be found at the requested domain and path. Otherwise, return
* a site object.
*
* @since 3.9.0
*
* @param null|bool|object $site Site value to return by path.
* @param string $domain The requested domain.
* @param string $path The requested path, in full.
* @param int|null $segments The suggested number of paths to consult.
* Default null, meaning the entire path was to be consulted.
* @param array $paths The paths to search for, based on $path and $segments.
*/
$pre = apply_filters( 'pre_get_site_by_path', null, $domain, $path, $segments, $paths );
if ( null !== $pre ) {
return $pre;
}
/*
* @todo
* get_blog_details(), caching, etc. Consider alternative optimization routes,
* perhaps as an opt-in for plugins, rather than using the pre_* filter.
* For example: The segments filter can expand or ignore paths.
* If persistent caching is enabled, we could query the DB for a path <> '/'
* then cache whether we can just always ignore paths.
*/
// Either www or non-www is supported, not both. If a www domain is requested,
// query for both to provide the proper redirect.
$domains = array( $domain );
if ( 'www.' === substr( $domain, 0, 4 ) ) {
$domains[] = substr( $domain, 4 );
$search_domains = "'" . implode( "', '", $wpdb->_escape( $domains ) ) . "'";
}
if ( count( $paths ) > 1 ) {
$search_paths = "'" . implode( "', '", $wpdb->_escape( $paths ) ) . "'";
}
if ( count( $domains ) > 1 && count( $paths ) > 1 ) {
$site = $wpdb->get_row( "SELECT * FROM $wpdb->blogs WHERE domain IN ($search_domains) AND path IN ($search_paths) ORDER BY CHAR_LENGTH(domain) DESC, CHAR_LENGTH(path) DESC LIMIT 1" );
} elseif ( count( $domains ) > 1 ) {
$sql = $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE path = %s", $paths[0] );
$sql .= " AND domain IN ($search_domains) ORDER BY CHAR_LENGTH(domain) DESC LIMIT 1";
$site = $wpdb->get_row( $sql );
} elseif ( count( $paths ) > 1 ) {
$sql = $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain = %s", $domains[0] );
$sql .= " AND path IN ($search_paths) ORDER BY CHAR_LENGTH(path) DESC LIMIT 1";
$site = $wpdb->get_row( $sql );
} else {
$site = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->blogs WHERE domain = %s AND path = %s", $domains[0], $paths[0] ) );
}
if ( $site ) {
// @todo get_blog_details()
return $site;
}
return false;
}
/**
* Displays a failure message.
*
* Used when a blog's tables do not exist. Checks for a missing $wpdb->site table as well.
*
* @access private
* @since 3.0.0
* @since 4.4.0 The `$domain` and `$path` parameters were added.
*
* @global wpdb $wpdb WordPress database abstraction object.
*
* @param string $domain The requested domain for the error to reference.
* @param string $path The requested path for the error to reference.
*/
function ms_not_installed( $domain, $path ) {
global $wpdb;
if ( ! is_admin() ) {
dead_db();
}
wp_load_translations_early();
$title = __( 'Error establishing a database connection' );
$msg = '<h1>' . $title . '</h1>';
$msg .= '<p>' . __( 'If your site does not display, please contact the owner of this network.' ) . '';
$msg .= ' ' . __( 'If you are the owner of this network please check that MySQL is running properly and all tables are error free.' ) . '</p>';
$query = $wpdb->prepare( "SHOW TABLES LIKE %s", $wpdb->esc_like( $wpdb->site ) );
if ( ! $wpdb->get_var( $query ) ) {
$msg .= '<p>' . sprintf(
/* translators: %s: table name */
__( '<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.' ),
'<code>' . $wpdb->site . '</code>'
) . '</p>';
} else {
$msg .= '<p>' . sprintf(
/* translators: 1: site url, 2: table name, 3: database name */
__( '<strong>Could not find site %1$s.</strong> Searched for table %2$s in database %3$s. Is that right?' ),
'<code>' . rtrim( $domain . $path, '/' ) . '</code>',
'<code>' . $wpdb->blogs . '</code>',
'<code>' . DB_NAME . '</code>'
) . '</p>';
}
$msg .= '<p><strong>' . __( 'What do I do now?' ) . '</strong> ';
/* translators: %s: Codex URL */
$msg .= sprintf( __( 'Read the <a href="%s" target="_blank">bug report</a> page. Some of the guidelines there may help you figure out what went wrong.' ),
__( 'https://codex.wordpress.org/Debugging_a_WordPress_Network' )
);
$msg .= ' ' . __( 'If you’re still stuck with this message, then check that your database contains the following tables:' ) . '</p><ul>';
foreach ( $wpdb->tables('global') as $t => $table ) {
if ( 'sitecategories' == $t )
continue;
$msg .= '<li>' . $table . '</li>';
}
$msg .= '</ul>';
wp_die( $msg, $title, array( 'response' => 500 ) );
}
/**
* This deprecated function formerly set the site_name property of the $current_site object.
*
* This function simply returns the object, as before.
* The bootstrap takes care of setting site_name.
*
* @access private
* @since 3.0.0
* @deprecated 3.9.0 Use get_current_site() instead.
*
* @param object $current_site
* @return object
*/
function get_current_site_name( $current_site ) {
_deprecated_function( __FUNCTION__, '3.9', 'get_current_site()' );
return $current_site;
}
/**
* This deprecated function managed much of the site and network loading in multisite.
*
* The current bootstrap code is now responsible for parsing the site and network load as
* well as setting the global $current_site object.
*
* @access private
* @since 3.0.0
* @deprecated 3.9.0
*
* @global object $current_site
*
* @return object
*/
function wpmu_current_site() {
global $current_site;
_deprecated_function( __FUNCTION__, '3.9' );
return $current_site;
}