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.
22 * @property int $site_id
30 * @since 4.6.0 Converted from public to private to explicitly enable more intuitive
31 * access via magic methods. As part of the access change, the type was
32 * also changed from `string` to `int`.
39 * Domain of the network.
48 * Path of the network.
57 * The ID of the network's main site.
59 * Named "blog" vs. "site" for legacy reasons. A main site is mapped to
60 * the network when the network is created.
62 * A numeric string, for compatibility reasons.
68 private $blog_id = '0';
71 * Domain used to set cookies for this network.
77 public $cookie_domain = '';
80 * Name of this network.
82 * Named "site" vs. "network" for legacy reasons.
88 public $site_name = '';
91 * Retrieve a network from the database by its ID.
96 * @global wpdb $wpdb WordPress database abstraction object.
98 * @param int $network_id The ID of the network to retrieve.
99 * @return WP_Network|bool The network's object if found. False if not.
101 public static function get_instance( $network_id ) {
104 $network_id = (int) $network_id;
105 if ( ! $network_id ) {
109 $_network = wp_cache_get( $network_id, 'networks' );
112 $_network = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->site} WHERE id = %d LIMIT 1", $network_id ) );
114 if ( empty( $_network ) || is_wp_error( $_network ) ) {
118 wp_cache_add( $network_id, $_network, 'networks' );
121 return new WP_Network( $_network );
125 * Create a new WP_Network object.
127 * Will populate object properties from the object provided and assign other
128 * default properties based on that information.
133 * @param WP_Network|object $network A network object.
135 public function __construct( $network ) {
136 foreach( get_object_vars( $network ) as $key => $value ) {
137 $this->$key = $value;
140 $this->_set_site_name();
141 $this->_set_cookie_domain();
147 * Allows current multisite naming conventions when getting properties.
152 * @param string $key Property to get.
153 * @return mixed Value of the property. Null if not available.
155 public function __get( $key ) {
158 return (int) $this->id;
160 return $this->blog_id;
162 return (int) $this->blog_id;
171 * Allows current multisite naming conventions when checking for properties.
176 * @param string $key Property to check if set.
177 * @return bool Whether the property is set.
179 public function __isset( $key ) {
193 * Allows current multisite naming conventions while setting properties.
198 * @param string $key Property to set.
199 * @param mixed $value Value to assign to the property.
201 public function __set( $key, $value ) {
204 $this->id = (int) $value;
208 $this->blog_id = (string) $value;
211 $this->$key = $value;
216 * Set the site name assigned to the network if one has not been populated.
221 private function _set_site_name() {
222 if ( ! empty( $this->site_name ) ) {
226 $default = ucfirst( $this->domain );
227 $this->site_name = get_network_option( $this->id, 'site_name', $default );
231 * Set the cookie domain based on the network domain if one has
232 * not been populated.
234 * @todo What if the domain of the network doesn't match the current site?
239 private function _set_cookie_domain() {
240 if ( ! empty( $this->cookie_domain ) ) {
244 $this->cookie_domain = $this->domain;
245 if ( 'www.' === substr( $this->cookie_domain, 0, 4 ) ) {
246 $this->cookie_domain = substr( $this->cookie_domain, 4 );
251 * Retrieve the closest matching network for a domain and path.
253 * This will not necessarily return an exact match for a domain and path. Instead, it
254 * breaks the domain and path into pieces that are then used to match the closest
255 * possibility from a query.
257 * The intent of this method is to match a network during bootstrap for a
258 * requested site address.
264 * @param string $domain Domain to check.
265 * @param string $path Path to check.
266 * @param int|null $segments Path segments to use. Defaults to null, or the full path.
267 * @return WP_Network|bool Network object if successful. False when no network is found.
269 public static function get_by_path( $domain = '', $path = '', $segments = null ) {
272 $domains = array( $domain );
273 $pieces = explode( '.', $domain );
276 * It's possible one domain to search is 'com', but it might as well
277 * be 'localhost' or some other locally mapped domain.
279 while ( array_shift( $pieces ) ) {
280 if ( ! empty( $pieces ) ) {
281 $domains[] = implode( '.', $pieces );
286 * If we've gotten to this function during normal execution, there is
287 * more than one network installed. At this point, who knows how many
288 * we have. Attempt to optimize for the situation where networks are
289 * only domains, thus meaning paths never need to be considered.
291 * This is a very basic optimization; anything further could have
292 * drawbacks depending on the setup, so this is best done per-install.
295 if ( wp_using_ext_object_cache() ) {
296 $using_paths = wp_cache_get( 'networks_have_paths', 'site-options' );
297 if ( false === $using_paths ) {
298 $using_paths = (int) $wpdb->get_var( "SELECT id FROM {$wpdb->site} WHERE path <> '/' LIMIT 1" );
299 wp_cache_add( 'networks_have_paths', $using_paths, 'site-options' );
304 if ( $using_paths ) {
305 $path_segments = array_filter( explode( '/', trim( $path, '/' ) ) );
308 * Filters the number of path segments to consider when searching for a site.
312 * @param int|null $segments The number of path segments to consider. WordPress by default looks at
313 * one path segment. The function default of null only makes sense when you
314 * know the requested path should match a network.
315 * @param string $domain The requested domain.
316 * @param string $path The requested path, in full.
318 $segments = apply_filters( 'network_by_path_segments_count', $segments, $domain, $path );
320 if ( ( null !== $segments ) && count( $path_segments ) > $segments ) {
321 $path_segments = array_slice( $path_segments, 0, $segments );
324 while ( count( $path_segments ) ) {
325 $paths[] = '/' . implode( '/', $path_segments ) . '/';
326 array_pop( $path_segments );
333 * Determine a network by its domain and path.
335 * This allows one to short-circuit the default logic, perhaps by
336 * replacing it with a routine that is more optimal for your setup.
338 * Return null to avoid the short-circuit. Return false if no network
339 * can be found at the requested domain and path. Otherwise, return
340 * an object from wp_get_network().
344 * @param null|bool|object $network Network value to return by path.
345 * @param string $domain The requested domain.
346 * @param string $path The requested path, in full.
347 * @param int|null $segments The suggested number of paths to consult.
348 * Default null, meaning the entire path was to be consulted.
349 * @param array $paths The paths to search for, based on $path and $segments.
351 $pre = apply_filters( 'pre_get_network_by_path', null, $domain, $path, $segments, $paths );
352 if ( null !== $pre ) {
356 // @todo Consider additional optimization routes, perhaps as an opt-in for plugins.
357 // We already have paths covered. What about how far domains should be drilled down (including www)?
359 $search_domains = "'" . implode( "', '", $wpdb->_escape( $domains ) ) . "'";
361 if ( ! $using_paths ) {
362 $network = $wpdb->get_row( "
363 SELECT * FROM {$wpdb->site}
364 WHERE domain IN ({$search_domains})
365 ORDER BY CHAR_LENGTH(domain)
369 if ( ! empty( $network ) && ! is_wp_error( $network ) ) {
370 return new WP_Network( $network );
376 $search_paths = "'" . implode( "', '", $wpdb->_escape( $paths ) ) . "'";
377 $networks = $wpdb->get_results( "
378 SELECT * FROM {$wpdb->site}
379 WHERE domain IN ({$search_domains})
380 AND path IN ({$search_paths})
381 ORDER BY CHAR_LENGTH(domain) DESC, CHAR_LENGTH(path) DESC
386 * Domains are sorted by length of domain, then by length of path.
387 * The domain must match for the path to be considered. Otherwise,
388 * a network with the path of / will suffice.
391 foreach ( $networks as $network ) {
392 if ( ( $network->domain === $domain ) || ( "www.{$network->domain}" === $domain ) ) {
393 if ( in_array( $network->path, $paths, true ) ) {
398 if ( $network->path === '/' ) {
404 if ( true === $found ) {
405 return new WP_Network( $network );