3 * Network API: WP_Network class
6 * @subpackage Multisite
11 * Core class used for interacting with a multisite network.
13 * This class is used during load to populate the `$current_site` global and
14 * setup the current network.
16 * This class is most useful in WordPress multi-network installations where the
17 * ability to interact with any network of sites is required.
26 * A numeric string, for compatibility reasons.
35 * Domain of the network.
44 * Path of the network.
53 * The ID of the network's main site.
55 * Named "blog" vs. "site" for legacy reasons. A main site is mapped to
56 * the network when the network is created.
58 * A numeric string, for compatibility reasons.
67 * Domain used to set cookies for this network.
73 public $cookie_domain = '';
76 * Name of this network.
78 * Named "site" vs. "network" for legacy reasons.
84 public $site_name = '';
87 * Retrieve a network from the database by its ID.
92 * @global wpdb $wpdb WordPress database abstraction object.
94 * @param int $network_id The ID of the network to retrieve.
95 * @return WP_Network|bool The network's object if found. False if not.
97 public static function get_instance( $network_id ) {
100 $network_id = (int) $network_id;
101 if ( ! $network_id ) {
105 $_network = wp_cache_get( $network_id, 'networks' );
108 $_network = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->site} WHERE id = %d LIMIT 1", $network_id ) );
110 if ( empty( $_network ) || is_wp_error( $_network ) ) {
114 wp_cache_add( $network_id, $_network, 'networks' );
117 return new WP_Network( $_network );
121 * Create a new WP_Network object.
123 * Will populate object properties from the object provided and assign other
124 * default properties based on that information.
129 * @param WP_Network|object $network A network object.
131 public function __construct( $network ) {
132 foreach( get_object_vars( $network ) as $key => $value ) {
133 $this->$key = $value;
136 $this->_set_site_name();
137 $this->_set_cookie_domain();
141 * Set the site name assigned to the network if one has not been populated.
146 private function _set_site_name() {
147 if ( ! empty( $this->site_name ) ) {
151 $default = ucfirst( $this->domain );
152 $this->site_name = get_network_option( $this->id, 'site_name', $default );
156 * Set the cookie domain based on the network domain if one has
157 * not been populated.
159 * @todo What if the domain of the network doesn't match the current site?
164 private function _set_cookie_domain() {
165 if ( ! empty( $this->cookie_domain ) ) {
169 $this->cookie_domain = $this->domain;
170 if ( 'www.' === substr( $this->cookie_domain, 0, 4 ) ) {
171 $this->cookie_domain = substr( $this->cookie_domain, 4 );
176 * Retrieve the closest matching network for a domain and path.
178 * This will not necessarily return an exact match for a domain and path. Instead, it
179 * breaks the domain and path into pieces that are then used to match the closest
180 * possibility from a query.
182 * The intent of this method is to match a network during bootstrap for a
183 * requested site address.
189 * @param string $domain Domain to check.
190 * @param string $path Path to check.
191 * @param int|null $segments Path segments to use. Defaults to null, or the full path.
192 * @return WP_Network|bool Network object if successful. False when no network is found.
194 public static function get_by_path( $domain = '', $path = '', $segments = null ) {
197 $domains = array( $domain );
198 $pieces = explode( '.', $domain );
201 * It's possible one domain to search is 'com', but it might as well
202 * be 'localhost' or some other locally mapped domain.
204 while ( array_shift( $pieces ) ) {
205 if ( ! empty( $pieces ) ) {
206 $domains[] = implode( '.', $pieces );
211 * If we've gotten to this function during normal execution, there is
212 * more than one network installed. At this point, who knows how many
213 * we have. Attempt to optimize for the situation where networks are
214 * only domains, thus meaning paths never need to be considered.
216 * This is a very basic optimization; anything further could have
217 * drawbacks depending on the setup, so this is best done per-install.
220 if ( wp_using_ext_object_cache() ) {
221 $using_paths = wp_cache_get( 'networks_have_paths', 'site-options' );
222 if ( false === $using_paths ) {
223 $using_paths = (int) $wpdb->get_var( "SELECT id FROM {$wpdb->site} WHERE path <> '/' LIMIT 1" );
224 wp_cache_add( 'networks_have_paths', $using_paths, 'site-options' );
229 if ( $using_paths ) {
230 $path_segments = array_filter( explode( '/', trim( $path, '/' ) ) );
233 * Filter the number of path segments to consider when searching for a site.
237 * @param int|null $segments The number of path segments to consider. WordPress by default looks at
238 * one path segment. The function default of null only makes sense when you
239 * know the requested path should match a network.
240 * @param string $domain The requested domain.
241 * @param string $path The requested path, in full.
243 $segments = apply_filters( 'network_by_path_segments_count', $segments, $domain, $path );
245 if ( ( null !== $segments ) && count( $path_segments ) > $segments ) {
246 $path_segments = array_slice( $path_segments, 0, $segments );
249 while ( count( $path_segments ) ) {
250 $paths[] = '/' . implode( '/', $path_segments ) . '/';
251 array_pop( $path_segments );
258 * Determine a network by its domain and path.
260 * This allows one to short-circuit the default logic, perhaps by
261 * replacing it with a routine that is more optimal for your setup.
263 * Return null to avoid the short-circuit. Return false if no network
264 * can be found at the requested domain and path. Otherwise, return
265 * an object from wp_get_network().
269 * @param null|bool|object $network Network value to return by path.
270 * @param string $domain The requested domain.
271 * @param string $path The requested path, in full.
272 * @param int|null $segments The suggested number of paths to consult.
273 * Default null, meaning the entire path was to be consulted.
274 * @param array $paths The paths to search for, based on $path and $segments.
276 $pre = apply_filters( 'pre_get_network_by_path', null, $domain, $path, $segments, $paths );
277 if ( null !== $pre ) {
281 // @todo Consider additional optimization routes, perhaps as an opt-in for plugins.
282 // We already have paths covered. What about how far domains should be drilled down (including www)?
284 $search_domains = "'" . implode( "', '", $wpdb->_escape( $domains ) ) . "'";
286 if ( ! $using_paths ) {
287 $network = $wpdb->get_row( "
288 SELECT * FROM {$wpdb->site}
289 WHERE domain IN ({$search_domains})
290 ORDER BY CHAR_LENGTH(domain)
294 if ( ! empty( $network ) && ! is_wp_error( $network ) ) {
295 return new WP_Network( $network );
301 $search_paths = "'" . implode( "', '", $wpdb->_escape( $paths ) ) . "'";
302 $networks = $wpdb->get_results( "
303 SELECT * FROM {$wpdb->site}
304 WHERE domain IN ({$search_domains})
305 AND path IN ({$search_paths})
306 ORDER BY CHAR_LENGTH(domain) DESC, CHAR_LENGTH(path) DESC
311 * Domains are sorted by length of domain, then by length of path.
312 * The domain must match for the path to be considered. Otherwise,
313 * a network with the path of / will suffice.
316 foreach ( $networks as $network ) {
317 if ( ( $network->domain === $domain ) || ( "www.{$network->domain}" === $domain ) ) {
318 if ( in_array( $network->path, $paths, true ) ) {
323 if ( $network->path === '/' ) {
329 if ( true === $found ) {
330 return new WP_Network( $network );