336 lines
8.9 KiB
PHP
336 lines
8.9 KiB
PHP
<?php
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/**
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* Network API: WP_Network class
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*
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* @package WordPress
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* @subpackage Multisite
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* @since 4.4.0
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*/
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/**
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* Core class used for interacting with a multisite network.
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*
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* This class is used during load to populate the `$current_site` global and
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* setup the current network.
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*
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* This class is most useful in WordPress multi-network installations where the
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* ability to interact with any network of sites is required.
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*
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* @since 4.4.0
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*/
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class WP_Network {
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/**
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* Network ID.
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*
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* A numeric string, for compatibility reasons.
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*
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* @since 4.4.0
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* @access public
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* @var string
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*/
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public $id;
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/**
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* Domain of the network.
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*
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* @since 4.4.0
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* @access public
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* @var string
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*/
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public $domain = '';
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/**
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* Path of the network.
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*
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* @since 4.4.0
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* @access public
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* @var string
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*/
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public $path = '';
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/**
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* The ID of the network's main site.
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*
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* Named "blog" vs. "site" for legacy reasons. A main site is mapped to
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* the network when the network is created.
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*
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* A numeric string, for compatibility reasons.
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*
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* @since 4.4.0
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* @access public
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* @var string
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*/
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public $blog_id = 0;
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/**
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* Domain used to set cookies for this network.
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*
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* @since 4.4.0
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* @access public
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* @var string
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*/
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public $cookie_domain = '';
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/**
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* Name of this network.
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*
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* Named "site" vs. "network" for legacy reasons.
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*
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* @since 4.4.0
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* @access public
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* @var string
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*/
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public $site_name = '';
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/**
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* Retrieve a network from the database by its ID.
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*
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* @since 4.4.0
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* @access public
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*
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* @global wpdb $wpdb WordPress database abstraction object.
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*
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* @param int $network_id The ID of the network to retrieve.
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* @return WP_Network|bool The network's object if found. False if not.
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*/
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public static function get_instance( $network_id ) {
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global $wpdb;
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$network_id = (int) $network_id;
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if ( ! $network_id ) {
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return false;
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}
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$_network = wp_cache_get( $network_id, 'networks' );
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if ( ! $_network ) {
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$_network = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->site} WHERE id = %d LIMIT 1", $network_id ) );
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if ( empty( $_network ) || is_wp_error( $_network ) ) {
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return false;
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}
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wp_cache_add( $network_id, $_network, 'networks' );
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}
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return new WP_Network( $_network );
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}
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/**
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* Create a new WP_Network object.
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*
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* Will populate object properties from the object provided and assign other
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* default properties based on that information.
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*
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* @since 4.4.0
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* @access public
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*
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* @param WP_Network|object $network A network object.
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*/
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public function __construct( $network ) {
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foreach( get_object_vars( $network ) as $key => $value ) {
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$this->$key = $value;
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}
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$this->_set_site_name();
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$this->_set_cookie_domain();
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}
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/**
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* Set the site name assigned to the network if one has not been populated.
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*
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* @since 4.4.0
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* @access private
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*/
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private function _set_site_name() {
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if ( ! empty( $this->site_name ) ) {
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return;
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}
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$default = ucfirst( $this->domain );
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$this->site_name = get_network_option( $this->id, 'site_name', $default );
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}
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/**
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* Set the cookie domain based on the network domain if one has
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* not been populated.
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*
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* @todo What if the domain of the network doesn't match the current site?
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*
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* @since 4.4.0
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* @access private
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*/
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private function _set_cookie_domain() {
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if ( ! empty( $this->cookie_domain ) ) {
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return;
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}
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$this->cookie_domain = $this->domain;
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if ( 'www.' === substr( $this->cookie_domain, 0, 4 ) ) {
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$this->cookie_domain = substr( $this->cookie_domain, 4 );
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}
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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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* 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 network during bootstrap for a
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* requested site address.
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*
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* @since 4.4.0
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* @access public
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* @static
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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|bool Network object if successful. False when no network is found.
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*/
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public static function get_by_path( $domain = '', $path = '', $segments = null ) {
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global $wpdb;
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$domains = array( $domain );
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$pieces = explode( '.', $domain );
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/*
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* It's possible one domain to search is 'com', but it might as well
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* be 'localhost' or some other locally mapped domain.
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*/
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while ( array_shift( $pieces ) ) {
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if ( ! empty( $pieces ) ) {
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$domains[] = implode( '.', $pieces );
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}
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}
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/*
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* If we've gotten to this function during normal execution, there is
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* more than one network installed. At this point, who knows how many
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* we have. Attempt to optimize for the situation where networks are
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* only domains, thus meaning paths never need to be considered.
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*
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* This is a very basic optimization; anything further could have
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* drawbacks depending on the setup, so this is best done per-install.
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*/
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$using_paths = true;
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if ( wp_using_ext_object_cache() ) {
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$using_paths = wp_cache_get( 'networks_have_paths', 'site-options' );
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if ( false === $using_paths ) {
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$using_paths = (int) $wpdb->get_var( "SELECT id FROM {$wpdb->site} WHERE path <> '/' LIMIT 1" );
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wp_cache_add( 'networks_have_paths', $using_paths, 'site-options' );
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}
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}
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$paths = array();
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if ( $using_paths ) {
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$path_segments = array_filter( explode( '/', trim( $path, '/' ) ) );
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/**
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* Filter 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. The function default of null only makes sense when you
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* know the requested path should match a network.
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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( 'network_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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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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/**
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* Determine a network 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 network
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* can be found at the requested domain and path. Otherwise, return
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* an object from wp_get_network().
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*
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* @since 3.9.0
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*
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* @param null|bool|object $network Network value to return by path.
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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 array $paths The paths to search for, based on $path and $segments.
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*/
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$pre = apply_filters( 'pre_get_network_by_path', null, $domain, $path, $segments, $paths );
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if ( null !== $pre ) {
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return $pre;
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}
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// @todo Consider additional optimization routes, perhaps as an opt-in for plugins.
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// We already have paths covered. What about how far domains should be drilled down (including www)?
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$search_domains = "'" . implode( "', '", $wpdb->_escape( $domains ) ) . "'";
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if ( ! $using_paths ) {
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$network = $wpdb->get_row( "
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SELECT * FROM {$wpdb->site}
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WHERE domain IN ({$search_domains})
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ORDER BY CHAR_LENGTH(domain)
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DESC LIMIT 1
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" );
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if ( ! empty( $network ) && ! is_wp_error( $network ) ) {
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return new WP_Network( $network );
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}
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return false;
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} else {
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$search_paths = "'" . implode( "', '", $wpdb->_escape( $paths ) ) . "'";
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$networks = $wpdb->get_results( "
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SELECT * FROM {$wpdb->site}
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WHERE domain IN ({$search_domains})
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AND path IN ({$search_paths})
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ORDER BY CHAR_LENGTH(domain) DESC, CHAR_LENGTH(path) DESC
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" );
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}
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/*
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* Domains are sorted by length of domain, then by length of path.
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* The domain must match for the path to be considered. Otherwise,
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* a network with the path of / will suffice.
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*/
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$found = false;
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foreach ( $networks as $network ) {
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if ( ( $network->domain === $domain ) || ( "www.{$network->domain}" === $domain ) ) {
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if ( in_array( $network->path, $paths, true ) ) {
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$found = true;
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break;
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}
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}
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if ( $network->path === '/' ) {
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$found = true;
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break;
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}
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}
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if ( true === $found ) {
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return new WP_Network( $network );
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}
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return false;
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}
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}
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