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Edit File : class-wp-site-query.php \| Size : 26.78 KB
<?php /** * Site API: WP_Site_Query class * * @package WordPress * @subpackage Sites * @since 4.6.0 / /* * Core class used for querying sites. * * @since 4.6.0 * * @see WP_Site_Query::__construct() for accepted arguments. / class WP_Site_Query { /* * SQL for database query. * * @since 4.6.0 * @var string / public $request; /* * SQL query clauses. * * @since 4.6.0 * @var array / protected $sql_clauses = array( 'select' => '', 'from' => '', 'where' => array(), 'groupby' => '', 'orderby' => '', 'limits' => '', ); /* * Metadata query container. * * @since 5.1.0 * @var WP_Meta_Query / public $meta_query = false; /* * Metadata query clauses. * * @since 5.1.0 * @var array / protected $meta_query_clauses; /* * Date query container. * * @since 4.6.0 * @var object WP_Date_Query / public $date_query = false; /* * Query vars set by the user. * * @since 4.6.0 * @var array / public $query_vars; /* * Default values for query vars. * * @since 4.6.0 * @var array / public $query_var_defaults; /* * List of sites located by the query. * * @since 4.6.0 * @var array / public $sites; /* * The amount of found sites for the current query. * * @since 4.6.0 * @var int / public $found_sites = 0; /* * The number of pages. * * @since 4.6.0 * @var int / public $max_num_pages = 0; /* * Sets up the site query, based on the query vars passed. * * @since 4.6.0 * @since 4.8.0 Introduced the 'lang_id', 'lang__in', and 'lang__not_in' parameters. * @since 5.1.0 Introduced the 'update_site_meta_cache', 'meta_query', 'meta_key', * 'meta_value', 'meta_type' and 'meta_compare' parameters. * * @param string\|array $query { * Optional. Array or query string of site query parameters. Default empty. * * @type array $site__in Array of site IDs to include. Default empty. * @type array $site__not_in Array of site IDs to exclude. Default empty. * @type bool $count Whether to return a site count (true) or array of site objects. * Default false. * @type array $date_query Date query clauses to limit sites by. See WP_Date_Query. * Default null. * @type string $fields Site fields to return. Accepts 'ids' (returns an array of site IDs) * or empty (returns an array of complete site objects). Default empty. * @type int $ID A site ID to only return that site. Default empty. * @type int $number Maximum number of sites to retrieve. Default 100. * @type int $offset Number of sites to offset the query. Used to build LIMIT clause. * Default 0. * @type bool $no_found_rows Whether to disable the `SQL_CALC_FOUND_ROWS` query. Default true. * @type string\|array $orderby Site status or array of statuses. Accepts 'id', 'domain', 'path', * 'network_id', 'last_updated', 'registered', 'domain_length', * 'path_length', 'site__in' and 'network__in'. Also accepts false, * an empty array, or 'none' to disable `ORDER BY` clause. * Default 'id'. * @type string $order How to order retrieved sites. Accepts 'ASC', 'DESC'. Default 'ASC'. * @type int $network_id Limit results to those affiliated with a given network ID. If 0, * include all networks. Default 0. * @type array $network__in Array of network IDs to include affiliated sites for. Default empty. * @type array $network__not_in Array of network IDs to exclude affiliated sites for. Default empty. * @type string $domain Limit results to those affiliated with a given domain. Default empty. * @type array $domain__in Array of domains to include affiliated sites for. Default empty. * @type array $domain__not_in Array of domains to exclude affiliated sites for. Default empty. * @type string $path Limit results to those affiliated with a given path. Default empty. * @type array $path__in Array of paths to include affiliated sites for. Default empty. * @type array $path__not_in Array of paths to exclude affiliated sites for. Default empty. * @type int $public Limit results to public sites. Accepts '1' or '0'. Default empty. * @type int $archived Limit results to archived sites. Accepts '1' or '0'. Default empty. * @type int $mature Limit results to mature sites. Accepts '1' or '0'. Default empty. * @type int $spam Limit results to spam sites. Accepts '1' or '0'. Default empty. * @type int $deleted Limit results to deleted sites. Accepts '1' or '0'. Default empty. * @type int $lang_id Limit results to a language ID. Default empty. * @type array $lang__in Array of language IDs to include affiliated sites for. Default empty. * @type array $lang__not_in Array of language IDs to exclude affiliated sites for. Default empty. * @type string $search Search term(s) to retrieve matching sites for. Default empty. * @type array $search_columns Array of column names to be searched. Accepts 'domain' and 'path'. * Default empty array. * @type bool $update_site_cache Whether to prime the cache for found sites. Default true. * @type bool $update_site_meta_cache Whether to prime the metadata cache for found sites. Default true. * @type array $meta_query Meta query clauses to limit retrieved sites by. See `WP_Meta_Query`. * Default empty. * @type string $meta_key Limit sites to those matching a specific metadata key. * Can be used in conjunction with `$meta_value`. Default empty. * @type string $meta_value Limit sites to those matching a specific metadata value. * Usually used in conjunction with `$meta_key`. Default empty. * @type string $meta_type Data type that the `$meta_value` column will be CAST to for * comparisons. Default empty. * @type string $meta_compare Comparison operator to test the `$meta_value`. Default empty. * } / public function __construct( $query = '' ) { $this->query_var_defaults = array( 'fields' => '', 'ID' => '', 'site__in' => '', 'site__not_in' => '', 'number' => 100, 'offset' => '', 'no_found_rows' => true, 'orderby' => 'id', 'order' => 'ASC', 'network_id' => 0, 'network__in' => '', 'network__not_in' => '', 'domain' => '', 'domain__in' => '', 'domain__not_in' => '', 'path' => '', 'path__in' => '', 'path__not_in' => '', 'public' => null, 'archived' => null, 'mature' => null, 'spam' => null, 'deleted' => null, 'lang_id' => null, 'lang__in' => '', 'lang__not_in' => '', 'search' => '', 'search_columns' => array(), 'count' => false, 'date_query' => null, // See WP_Date_Query 'update_site_cache' => true, 'update_site_meta_cache' => true, 'meta_query' => '', 'meta_key' => '', 'meta_value' => '', 'meta_type' => '', 'meta_compare' => '', ); if ( ! empty( $query ) ) { $this->query( $query ); } } /* * Parses arguments passed to the site query with default query parameters. * * @since 4.6.0 * * @see WP_Site_Query::__construct() * * @param string\|array $query Array or string of WP_Site_Query arguments. See WP_Site_Query::__construct(). / public function parse_query( $query = '' ) { if ( empty( $query ) ) { $query = $this->query_vars; } $this->query_vars = wp_parse_args( $query, $this->query_var_defaults ); /* * Fires after the site query vars have been parsed. * * @since 4.6.0 * * @param WP_Site_Query $this The WP_Site_Query instance (passed by reference). / do_action_ref_array( 'parse_site_query', array( &$this ) ); } /* * Sets up the WordPress query for retrieving sites. * * @since 4.6.0 * * @param string\|array $query Array or URL query string of parameters. * @return array\|int List of WP_Site objects, a list of site ids when 'fields' is set to 'ids', * or the number of sites when 'count' is passed as a query var. / public function query( $query ) { $this->query_vars = wp_parse_args( $query ); return $this->get_sites(); } /* * Retrieves a list of sites matching the query vars. * * @since 4.6.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @return array\|int List of WP_Site objects, a list of site ids when 'fields' is set to 'ids', * or the number of sites when 'count' is passed as a query var. / public function get_sites() { global $wpdb; $this->parse_query(); // Parse meta query. $this->meta_query = new WP_Meta_Query(); $this->meta_query->parse_query_vars( $this->query_vars ); /* * Fires before sites are retrieved. * * @since 4.6.0 * * @param WP_Site_Query $this Current instance of WP_Site_Query (passed by reference). / do_action_ref_array( 'pre_get_sites', array( &$this ) ); // Reparse query vars, in case they were modified in a 'pre_get_sites' callback. $this->meta_query->parse_query_vars( $this->query_vars ); if ( ! empty( $this->meta_query->queries ) ) { $this->meta_query_clauses = $this->meta_query->get_sql( 'blog', $wpdb->blogs, 'blog_id', $this ); } // $args can include anything. Only use the args defined in the query_var_defaults to compute the key. $_args = wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) ); // Ignore the $fields argument as the queried result will be the same regardless. unset( $_args['fields'] ); $key = md5( serialize( $_args ) ); $last_changed = wp_cache_get_last_changed( 'sites' ); $cache_key = "get_sites:$key:$last_changed"; $cache_value = wp_cache_get( $cache_key, 'sites' ); if ( false === $cache_value ) { $site_ids = $this->get_site_ids(); if ( $site_ids ) { $this->set_found_sites(); } $cache_value = array( 'site_ids' => $site_ids, 'found_sites' => $this->found_sites, ); wp_cache_add( $cache_key, $cache_value, 'sites' ); } else { $site_ids = $cache_value['site_ids']; $this->found_sites = $cache_value['found_sites']; } if ( $this->found_sites && $this->query_vars['number'] ) { $this->max_num_pages = ceil( $this->found_sites / $this->query_vars['number'] ); } // If querying for a count only, there's nothing more to do. if ( $this->query_vars['count'] ) { // $site_ids is actually a count in this case. return intval( $site_ids ); } $site_ids = array_map( 'intval', $site_ids ); if ( 'ids' == $this->query_vars['fields'] ) { $this->sites = $site_ids; return $this->sites; } // Prime site network caches. if ( $this->query_vars['update_site_cache'] ) { _prime_site_caches( $site_ids, $this->query_vars['update_site_meta_cache'] ); } // Fetch full site objects from the primed cache. $_sites = array(); foreach ( $site_ids as $site_id ) { if ( $_site = get_site( $site_id ) ) { $_sites[] = $_site; } } /* * Filters the site query results. * * @since 4.6.0 * * @param WP_Site[] $_sites An array of WP_Site objects. * @param WP_Site_Query $this Current instance of WP_Site_Query (passed by reference). / $_sites = apply_filters_ref_array( 'the_sites', array( $_sites, &$this ) ); // Convert to WP_Site instances. $this->sites = array_map( 'get_site', $_sites ); return $this->sites; } /* * Used internally to get a list of site IDs matching the query vars. * * @since 4.6.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @return int\|array A single count of site IDs if a count query. An array of site IDs if a full query. / protected function get_site_ids() { global $wpdb; $order = $this->parse_order( $this->query_vars['order'] ); // Disable ORDER BY with 'none', an empty array, or boolean false. if ( in_array( $this->query_vars['orderby'], array( 'none', array(), false ), true ) ) { $orderby = ''; } elseif ( ! empty( $this->query_vars['orderby'] ) ) { $ordersby = is_array( $this->query_vars['orderby'] ) ? $this->query_vars['orderby'] : preg_split( '/[,\s]/', $this->query_vars['orderby'] ); $orderby_array = array(); foreach ( $ordersby as $_key => $_value ) { if ( ! $_value ) { continue; } if ( is_int( $_key ) ) { $_orderby = $_value; $_order = $order; } else { $_orderby = $_key; $_order = $_value; } $parsed = $this->parse_orderby( $_orderby ); if ( ! $parsed ) { continue; } if ( 'site__in' === $_orderby \|\| 'network__in' === $_orderby ) { $orderby_array[] = $parsed; continue; } $orderby_array[] = $parsed . ' ' . $this->parse_order( $_order ); } $orderby = implode( ', ', $orderby_array ); } else { $orderby = "{$wpdb->blogs}.blog_id $order"; } $number = absint( $this->query_vars['number'] ); $offset = absint( $this->query_vars['offset'] ); $limits = ''; if ( ! empty( $number ) ) { if ( $offset ) { $limits = 'LIMIT ' . $offset . ',' . $number; } else { $limits = 'LIMIT ' . $number; } } if ( $this->query_vars['count'] ) { $fields = 'COUNT()'; } else { $fields = "{$wpdb->blogs}.blog_id"; } // Parse site IDs for an IN clause. $site_id = absint( $this->query_vars['ID'] ); if ( ! empty( $site_id ) ) { $this->sql_clauses['where']['ID'] = $wpdb->prepare( "{$wpdb->blogs}.blog_id = %d", $site_id ); } // Parse site IDs for an IN clause. if ( ! empty( $this->query_vars['site__in'] ) ) { $this->sql_clauses['where']['site__in'] = "{$wpdb->blogs}.blog_id IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['site__in'] ) ) . ' )'; } // Parse site IDs for a NOT IN clause. if ( ! empty( $this->query_vars['site__not_in'] ) ) { $this->sql_clauses['where']['site__not_in'] = "{$wpdb->blogs}.blog_id NOT IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['site__not_in'] ) ) . ' )'; } $network_id = absint( $this->query_vars['network_id'] ); if ( ! empty( $network_id ) ) { $this->sql_clauses['where']['network_id'] = $wpdb->prepare( 'site_id = %d', $network_id ); } // Parse site network IDs for an IN clause. if ( ! empty( $this->query_vars['network__in'] ) ) { $this->sql_clauses['where']['network__in'] = 'site_id IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['network__in'] ) ) . ' )'; } // Parse site network IDs for a NOT IN clause. if ( ! empty( $this->query_vars['network__not_in'] ) ) { $this->sql_clauses['where']['network__not_in'] = 'site_id NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['network__not_in'] ) ) . ' )'; } if ( ! empty( $this->query_vars['domain'] ) ) { $this->sql_clauses['where']['domain'] = $wpdb->prepare( 'domain = %s', $this->query_vars['domain'] ); } // Parse site domain for an IN clause. if ( is_array( $this->query_vars['domain__in'] ) ) { $this->sql_clauses['where']['domain__in'] = "domain IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['domain__in'] ) ) . "' )"; } // Parse site domain for a NOT IN clause. if ( is_array( $this->query_vars['domain__not_in'] ) ) { $this->sql_clauses['where']['domain__not_in'] = "domain NOT IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['domain__not_in'] ) ) . "' )"; } if ( ! empty( $this->query_vars['path'] ) ) { $this->sql_clauses['where']['path'] = $wpdb->prepare( 'path = %s', $this->query_vars['path'] ); } // Parse site path for an IN clause. if ( is_array( $this->query_vars['path__in'] ) ) { $this->sql_clauses['where']['path__in'] = "path IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['path__in'] ) ) . "' )"; } // Parse site path for a NOT IN clause. if ( is_array( $this->query_vars['path__not_in'] ) ) { $this->sql_clauses['where']['path__not_in'] = "path NOT IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['path__not_in'] ) ) . "' )"; } if ( is_numeric( $this->query_vars['archived'] ) ) { $archived = absint( $this->query_vars['archived'] ); $this->sql_clauses['where']['archived'] = $wpdb->prepare( 'archived = %s ', absint( $archived ) ); } if ( is_numeric( $this->query_vars['mature'] ) ) { $mature = absint( $this->query_vars['mature'] ); $this->sql_clauses['where']['mature'] = $wpdb->prepare( 'mature = %d ', $mature ); } if ( is_numeric( $this->query_vars['spam'] ) ) { $spam = absint( $this->query_vars['spam'] ); $this->sql_clauses['where']['spam'] = $wpdb->prepare( 'spam = %d ', $spam ); } if ( is_numeric( $this->query_vars['deleted'] ) ) { $deleted = absint( $this->query_vars['deleted'] ); $this->sql_clauses['where']['deleted'] = $wpdb->prepare( 'deleted = %d ', $deleted ); } if ( is_numeric( $this->query_vars['public'] ) ) { $public = absint( $this->query_vars['public'] ); $this->sql_clauses['where']['public'] = $wpdb->prepare( 'public = %d ', $public ); } if ( is_numeric( $this->query_vars['lang_id'] ) ) { $lang_id = absint( $this->query_vars['lang_id'] ); $this->sql_clauses['where']['lang_id'] = $wpdb->prepare( 'lang_id = %d ', $lang_id ); } // Parse site language IDs for an IN clause. if ( ! empty( $this->query_vars['lang__in'] ) ) { $this->sql_clauses['where']['lang__in'] = 'lang_id IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['lang__in'] ) ) . ' )'; } // Parse site language IDs for a NOT IN clause. if ( ! empty( $this->query_vars['lang__not_in'] ) ) { $this->sql_clauses['where']['lang__not_in'] = 'lang_id NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['lang__not_in'] ) ) . ' )'; } // Falsey search strings are ignored. if ( strlen( $this->query_vars['search'] ) ) { $search_columns = array(); if ( $this->query_vars['search_columns'] ) { $search_columns = array_intersect( $this->query_vars['search_columns'], array( 'domain', 'path' ) ); } if ( ! $search_columns ) { $search_columns = array( 'domain', 'path' ); } /** * Filters the columns to search in a WP_Site_Query search. * * The default columns include 'domain' and 'path. * * @since 4.6.0 * * @param string[] $search_columns Array of column names to be searched. * @param string $search Text being searched. * @param WP_Site_Query $this The current WP_Site_Query instance. / $search_columns = apply_filters( 'site_search_columns', $search_columns, $this->query_vars['search'], $this ); $this->sql_clauses['where']['search'] = $this->get_search_sql( $this->query_vars['search'], $search_columns ); } $date_query = $this->query_vars['date_query']; if ( ! empty( $date_query ) && is_array( $date_query ) ) { $this->date_query = new WP_Date_Query( $date_query, 'registered' ); $this->sql_clauses['where']['date_query'] = preg_replace( '/^\sAND\s/', '', $this->date_query->get_sql() ); } $join = ''; $groupby = ''; if ( ! empty( $this->meta_query_clauses ) ) { $join .= $this->meta_query_clauses['join']; // Strip leading 'AND'. $this->sql_clauses['where']['meta_query'] = preg_replace( '/^\sAND\s/', '', $this->meta_query_clauses['where'] ); if ( ! $this->query_vars['count'] ) { $groupby = "{$wpdb->blogs}.blog_id"; } } $where = implode( ' AND ', $this->sql_clauses['where'] ); $pieces = array( 'fields', 'join', 'where', 'orderby', 'limits', 'groupby' ); /* * Filters the site query clauses. * * @since 4.6.0 * * @param string[] $pieces An associative array of site query clauses. * @param WP_Site_Query $this Current instance of WP_Site_Query (passed by reference). / $clauses = apply_filters_ref_array( 'sites_clauses', array( compact( $pieces ), &$this ) ); $fields = isset( $clauses['fields'] ) ? $clauses['fields'] : ''; $join = isset( $clauses['join'] ) ? $clauses['join'] : ''; $where = isset( $clauses['where'] ) ? $clauses['where'] : ''; $orderby = isset( $clauses['orderby'] ) ? $clauses['orderby'] : ''; $limits = isset( $clauses['limits'] ) ? $clauses['limits'] : ''; $groupby = isset( $clauses['groupby'] ) ? $clauses['groupby'] : ''; if ( $where ) { $where = 'WHERE ' . $where; } if ( $groupby ) { $groupby = 'GROUP BY ' . $groupby; } if ( $orderby ) { $orderby = "ORDER BY $orderby"; } $found_rows = ''; if ( ! $this->query_vars['no_found_rows'] ) { $found_rows = 'SQL_CALC_FOUND_ROWS'; } $this->sql_clauses['select'] = "SELECT $found_rows $fields"; $this->sql_clauses['from'] = "FROM $wpdb->blogs $join"; $this->sql_clauses['groupby'] = $groupby; $this->sql_clauses['orderby'] = $orderby; $this->sql_clauses['limits'] = $limits; $this->request = "{$this->sql_clauses['select']} {$this->sql_clauses['from']} {$where} {$this->sql_clauses['groupby']} {$this->sql_clauses['orderby']} {$this->sql_clauses['limits']}"; if ( $this->query_vars['count'] ) { return intval( $wpdb->get_var( $this->request ) ); } $site_ids = $wpdb->get_col( $this->request ); return array_map( 'intval', $site_ids ); } /* * Populates found_sites and max_num_pages properties for the current query * if the limit clause was used. * * @since 4.6.0 * * @global wpdb $wpdb WordPress database abstraction object. / private function set_found_sites() { global $wpdb; if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) { /* * Filters the query used to retrieve found site count. * * @since 4.6.0 * * @param string $found_sites_query SQL query. Default 'SELECT FOUND_ROWS()'. * @param WP_Site_Query $site_query The `WP_Site_Query` instance. / $found_sites_query = apply_filters( 'found_sites_query', 'SELECT FOUND_ROWS()', $this ); $this->found_sites = (int) $wpdb->get_var( $found_sites_query ); } } /* * Used internally to generate an SQL string for searching across multiple columns. * * @since 4.6.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $string Search string. * @param string[] $columns Array of columns to search. * @return string Search SQL. / protected function get_search_sql( $string, $columns ) { global $wpdb; if ( false !== strpos( $string, '' ) ) { $like = '%' . implode( '%', array_map( array( $wpdb, 'esc_like' ), explode( '', $string ) ) ) . '%'; } else { $like = '%' . $wpdb->esc_like( $string ) . '%'; } $searches = array(); foreach ( $columns as $column ) { $searches[] = $wpdb->prepare( "$column LIKE %s", $like ); } return '(' . implode( ' OR ', $searches ) . ')'; } /* * Parses and sanitizes 'orderby' keys passed to the site query. * * @since 4.6.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $orderby Alias for the field to order by. * @return string\|false Value to used in the ORDER clause. False otherwise. / protected function parse_orderby( $orderby ) { global $wpdb; $parsed = false; switch ( $orderby ) { case 'site__in': $site__in = implode( ',', array_map( 'absint', $this->query_vars['site__in'] ) ); $parsed = "FIELD( {$wpdb->blogs}.blog_id, $site__in )"; break; case 'network__in': $network__in = implode( ',', array_map( 'absint', $this->query_vars['network__in'] ) ); $parsed = "FIELD( {$wpdb->blogs}.site_id, $network__in )"; break; case 'domain': case 'last_updated': case 'path': case 'registered': $parsed = $orderby; break; case 'network_id': $parsed = 'site_id'; break; case 'domain_length': $parsed = 'CHAR_LENGTH(domain)'; break; case 'path_length': $parsed = 'CHAR_LENGTH(path)'; break; case 'id': $parsed = "{$wpdb->blogs}.blog_id"; break; } if ( ! empty( $parsed ) \|\| empty( $this->meta_query_clauses ) ) { return $parsed; } $meta_clauses = $this->meta_query->get_clauses(); if ( empty( $meta_clauses ) ) { return $parsed; } $primary_meta_query = reset( $meta_clauses ); if ( ! empty( $primary_meta_query['key'] ) && $primary_meta_query['key'] === $orderby ) { $orderby = 'meta_value'; } switch ( $orderby ) { case 'meta_value': if ( ! empty( $primary_meta_query['type'] ) ) { $parsed = "CAST({$primary_meta_query['alias']}.meta_value AS {$primary_meta_query['cast']})"; } else { $parsed = "{$primary_meta_query['alias']}.meta_value"; } break; case 'meta_value_num': $parsed = "{$primary_meta_query['alias']}.meta_value+0"; break; default: if ( isset( $meta_clauses[ $orderby ] ) ) { $meta_clause = $meta_clauses[ $orderby ]; $parsed = "CAST({$meta_clause['alias']}.meta_value AS {$meta_clause['cast']})"; } } return $parsed; } /* * Parses an 'order' query variable and cast it to 'ASC' or 'DESC' as necessary. * * @since 4.6.0 * * @param string $order The 'order' query variable. * @return string The sanitized 'order' query variable. */ protected function parse_order( $order ) { if ( ! is_string( $order ) \|\| empty( $order ) ) { return 'ASC'; } if ( 'ASC' === strtoupper( $order ) ) { return 'ASC'; } else { return 'DESC'; } } } Back

Edit File : class-wp-site-query.php | Size : 26.78 KB

<?php
/**
 * Site API: WP_Site_Query class
 *
 * @package WordPress
 * @subpackage Sites
 * @since 4.6.0
 */

/**
 * Core class used for querying sites.
 *
 * @since 4.6.0
 *
 * @see WP_Site_Query::__construct() for accepted arguments.
 */
class WP_Site_Query {

/**
	 * SQL for database query.
	 *
	 * @since 4.6.0
	 * @var string
	 */
	public $request;

/**
	 * SQL query clauses.
	 *
	 * @since 4.6.0
	 * @var array
	 */
	protected $sql_clauses = array(
		'select'  => '',
		'from'    => '',
		'where'   => array(),
		'groupby' => '',
		'orderby' => '',
		'limits'  => '',
	);

/**
	 * Metadata query container.
	 *
	 * @since 5.1.0
	 * @var WP_Meta_Query
	 */
	public $meta_query = false;

/**
	 * Metadata query clauses.
	 *
	 * @since 5.1.0
	 * @var array
	 */
	protected $meta_query_clauses;

/**
	 * Date query container.
	 *
	 * @since 4.6.0
	 * @var object WP_Date_Query
	 */
	public $date_query = false;

/**
	 * Query vars set by the user.
	 *
	 * @since 4.6.0
	 * @var array
	 */
	public $query_vars;

/**
	 * Default values for query vars.
	 *
	 * @since 4.6.0
	 * @var array
	 */
	public $query_var_defaults;

/**
	 * List of sites located by the query.
	 *
	 * @since 4.6.0
	 * @var array
	 */
	public $sites;

/**
	 * The amount of found sites for the current query.
	 *
	 * @since 4.6.0
	 * @var int
	 */
	public $found_sites = 0;

/**
	 * The number of pages.
	 *
	 * @since 4.6.0
	 * @var int
	 */
	public $max_num_pages = 0;

/**
	 * Sets up the site query, based on the query vars passed.
	 *
	 * @since 4.6.0
	 * @since 4.8.0 Introduced the 'lang_id', 'lang__in', and 'lang__not_in' parameters.
	 * @since 5.1.0 Introduced the 'update_site_meta_cache', 'meta_query', 'meta_key',
	 *              'meta_value', 'meta_type' and 'meta_compare' parameters.
	 *
	 * @param string|array $query {
	 *     Optional. Array or query string of site query parameters. Default empty.
	 *
	 *     @type array        $site__in               Array of site IDs to include. Default empty.
	 *     @type array        $site__not_in           Array of site IDs to exclude. Default empty.
	 *     @type bool         $count                  Whether to return a site count (true) or array of site objects.
	 *                                                Default false.
	 *     @type array        $date_query             Date query clauses to limit sites by. See WP_Date_Query.
	 *                                                Default null.
	 *     @type string       $fields                 Site fields to return. Accepts 'ids' (returns an array of site IDs)
	 *                                                or empty (returns an array of complete site objects). Default empty.
	 *     @type int          $ID                     A site ID to only return that site. Default empty.
	 *     @type int          $number                 Maximum number of sites to retrieve. Default 100.
	 *     @type int          $offset                 Number of sites to offset the query. Used to build LIMIT clause.
	 *                                                Default 0.
	 *     @type bool         $no_found_rows          Whether to disable the `SQL_CALC_FOUND_ROWS` query. Default true.
	 *     @type string|array $orderby                Site status or array of statuses. Accepts 'id', 'domain', 'path',
	 *                                                'network_id', 'last_updated', 'registered', 'domain_length',
	 *                                                'path_length', 'site__in' and 'network__in'. Also accepts false,
	 *                                                an empty array, or 'none' to disable `ORDER BY` clause.
	 *                                                Default 'id'.
	 *     @type string       $order                  How to order retrieved sites. Accepts 'ASC', 'DESC'. Default 'ASC'.
	 *     @type int          $network_id             Limit results to those affiliated with a given network ID. If 0,
	 *                                                include all networks. Default 0.
	 *     @type array        $network__in            Array of network IDs to include affiliated sites for. Default empty.
	 *     @type array        $network__not_in        Array of network IDs to exclude affiliated sites for. Default empty.
	 *     @type string       $domain                 Limit results to those affiliated with a given domain. Default empty.
	 *     @type array        $domain__in             Array of domains to include affiliated sites for. Default empty.
	 *     @type array        $domain__not_in         Array of domains to exclude affiliated sites for. Default empty.
	 *     @type string       $path                   Limit results to those affiliated with a given path. Default empty.
	 *     @type array        $path__in               Array of paths to include affiliated sites for. Default empty.
	 *     @type array        $path__not_in           Array of paths to exclude affiliated sites for. Default empty.
	 *     @type int          $public                 Limit results to public sites. Accepts '1' or '0'. Default empty.
	 *     @type int          $archived               Limit results to archived sites. Accepts '1' or '0'. Default empty.
	 *     @type int          $mature                 Limit results to mature sites. Accepts '1' or '0'. Default empty.
	 *     @type int          $spam                   Limit results to spam sites. Accepts '1' or '0'. Default empty.
	 *     @type int          $deleted                Limit results to deleted sites. Accepts '1' or '0'. Default empty.
	 *     @type int          $lang_id                Limit results to a language ID. Default empty.
	 *     @type array        $lang__in               Array of language IDs to include affiliated sites for. Default empty.
	 *     @type array        $lang__not_in           Array of language IDs to exclude affiliated sites for. Default empty.
	 *     @type string       $search                 Search term(s) to retrieve matching sites for. Default empty.
	 *     @type array        $search_columns         Array of column names to be searched. Accepts 'domain' and 'path'.
	 *                                                Default empty array.
	 *     @type bool         $update_site_cache      Whether to prime the cache for found sites. Default true.
	 *     @type bool         $update_site_meta_cache Whether to prime the metadata cache for found sites. Default true.
	 *     @type array        $meta_query             Meta query clauses to limit retrieved sites by. See `WP_Meta_Query`.
	 *                                                Default empty.
	 *     @type string       $meta_key               Limit sites to those matching a specific metadata key.
	 *                                                Can be used in conjunction with `$meta_value`. Default empty.
	 *     @type string       $meta_value             Limit sites to those matching a specific metadata value.
	 *                                                Usually used in conjunction with `$meta_key`. Default empty.
	 *     @type string       $meta_type              Data type that the `$meta_value` column will be CAST to for
	 *                                                comparisons. Default empty.
	 *     @type string       $meta_compare           Comparison operator to test the `$meta_value`. Default empty.
	 * }
	 */
	public function __construct( $query = '' ) {
		$this->query_var_defaults = array(
			'fields'                 => '',
			'ID'                     => '',
			'site__in'               => '',
			'site__not_in'           => '',
			'number'                 => 100,
			'offset'                 => '',
			'no_found_rows'          => true,
			'orderby'                => 'id',
			'order'                  => 'ASC',
			'network_id'             => 0,
			'network__in'            => '',
			'network__not_in'        => '',
			'domain'                 => '',
			'domain__in'             => '',
			'domain__not_in'         => '',
			'path'                   => '',
			'path__in'               => '',
			'path__not_in'           => '',
			'public'                 => null,
			'archived'               => null,
			'mature'                 => null,
			'spam'                   => null,
			'deleted'                => null,
			'lang_id'                => null,
			'lang__in'               => '',
			'lang__not_in'           => '',
			'search'                 => '',
			'search_columns'         => array(),
			'count'                  => false,
			'date_query'             => null, // See WP_Date_Query
			'update_site_cache'      => true,
			'update_site_meta_cache' => true,
			'meta_query'             => '',
			'meta_key'               => '',
			'meta_value'             => '',
			'meta_type'              => '',
			'meta_compare'           => '',
		);

if ( ! empty( $query ) ) {
			$this->query( $query );
		}
	}

/**
	 * Parses arguments passed to the site query with default query parameters.
	 *
	 * @since 4.6.0
	 *
	 * @see WP_Site_Query::__construct()
	 *
	 * @param string|array $query Array or string of WP_Site_Query arguments. See WP_Site_Query::__construct().
	 */
	public function parse_query( $query = '' ) {
		if ( empty( $query ) ) {
			$query = $this->query_vars;
		}

$this->query_vars = wp_parse_args( $query, $this->query_var_defaults );

/**
		 * Fires after the site query vars have been parsed.
		 *
		 * @since 4.6.0
		 *
		 * @param WP_Site_Query $this The WP_Site_Query instance (passed by reference).
		 */
		do_action_ref_array( 'parse_site_query', array( &$this ) );
	}

/**
	 * Sets up the WordPress query for retrieving sites.
	 *
	 * @since 4.6.0
	 *
	 * @param string|array $query Array or URL query string of parameters.
	 * @return array|int List of WP_Site objects, a list of site ids when 'fields' is set to 'ids',
	 *                   or the number of sites when 'count' is passed as a query var.
	 */
	public function query( $query ) {
		$this->query_vars = wp_parse_args( $query );

return $this->get_sites();
	}

/**
	 * Retrieves a list of sites matching the query vars.
	 *
	 * @since 4.6.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @return array|int List of WP_Site objects, a list of site ids when 'fields' is set to 'ids',
	 *                   or the number of sites when 'count' is passed as a query var.
	 */
	public function get_sites() {
		global $wpdb;

$this->parse_query();

// Parse meta query.
		$this->meta_query = new WP_Meta_Query();
		$this->meta_query->parse_query_vars( $this->query_vars );

/**
		 * Fires before sites are retrieved.
		 *
		 * @since 4.6.0
		 *
		 * @param WP_Site_Query $this Current instance of WP_Site_Query (passed by reference).
		 */
		do_action_ref_array( 'pre_get_sites', array( &$this ) );

// Reparse query vars, in case they were modified in a 'pre_get_sites' callback.
		$this->meta_query->parse_query_vars( $this->query_vars );
		if ( ! empty( $this->meta_query->queries ) ) {
			$this->meta_query_clauses = $this->meta_query->get_sql( 'blog', $wpdb->blogs, 'blog_id', $this );
		}

// $args can include anything. Only use the args defined in the query_var_defaults to compute the key.
		$_args = wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) );

// Ignore the $fields argument as the queried result will be the same regardless.
		unset( $_args['fields'] );

$key          = md5( serialize( $_args ) );
		$last_changed = wp_cache_get_last_changed( 'sites' );

$cache_key   = "get_sites:$key:$last_changed";
		$cache_value = wp_cache_get( $cache_key, 'sites' );

if ( false === $cache_value ) {
			$site_ids = $this->get_site_ids();
			if ( $site_ids ) {
				$this->set_found_sites();
			}

$cache_value = array(
				'site_ids'    => $site_ids,
				'found_sites' => $this->found_sites,
			);
			wp_cache_add( $cache_key, $cache_value, 'sites' );
		} else {
			$site_ids          = $cache_value['site_ids'];
			$this->found_sites = $cache_value['found_sites'];
		}

if ( $this->found_sites && $this->query_vars['number'] ) {
			$this->max_num_pages = ceil( $this->found_sites / $this->query_vars['number'] );
		}

// If querying for a count only, there's nothing more to do.
		if ( $this->query_vars['count'] ) {
			// $site_ids is actually a count in this case.
			return intval( $site_ids );
		}

$site_ids = array_map( 'intval', $site_ids );

if ( 'ids' == $this->query_vars['fields'] ) {
			$this->sites = $site_ids;

return $this->sites;
		}

// Prime site network caches.
		if ( $this->query_vars['update_site_cache'] ) {
			_prime_site_caches( $site_ids, $this->query_vars['update_site_meta_cache'] );
		}

// Fetch full site objects from the primed cache.
		$_sites = array();
		foreach ( $site_ids as $site_id ) {
			if ( $_site = get_site( $site_id ) ) {
				$_sites[] = $_site;
			}
		}

/**
		 * Filters the site query results.
		 *
		 * @since 4.6.0
		 *
		 * @param WP_Site[]     $_sites An array of WP_Site objects.
		 * @param WP_Site_Query $this   Current instance of WP_Site_Query (passed by reference).
		 */
		$_sites = apply_filters_ref_array( 'the_sites', array( $_sites, &$this ) );

// Convert to WP_Site instances.
		$this->sites = array_map( 'get_site', $_sites );

return $this->sites;
	}

/**
	 * Used internally to get a list of site IDs matching the query vars.
	 *
	 * @since 4.6.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @return int|array A single count of site IDs if a count query. An array of site IDs if a full query.
	 */
	protected function get_site_ids() {
		global $wpdb;

$order = $this->parse_order( $this->query_vars['order'] );

// Disable ORDER BY with 'none', an empty array, or boolean false.
		if ( in_array( $this->query_vars['orderby'], array( 'none', array(), false ), true ) ) {
			$orderby = '';
		} elseif ( ! empty( $this->query_vars['orderby'] ) ) {
			$ordersby = is_array( $this->query_vars['orderby'] ) ?
				$this->query_vars['orderby'] :
				preg_split( '/[,\s]/', $this->query_vars['orderby'] );

$orderby_array = array();
			foreach ( $ordersby as $_key => $_value ) {
				if ( ! $_value ) {
					continue;
				}

if ( is_int( $_key ) ) {
					$_orderby = $_value;
					$_order   = $order;
				} else {
					$_orderby = $_key;
					$_order   = $_value;
				}

$parsed = $this->parse_orderby( $_orderby );

if ( ! $parsed ) {
					continue;
				}

if ( 'site__in' === $_orderby || 'network__in' === $_orderby ) {
					$orderby_array[] = $parsed;
					continue;
				}

$orderby_array[] = $parsed . ' ' . $this->parse_order( $_order );
			}

$orderby = implode( ', ', $orderby_array );
		} else {
			$orderby = "{$wpdb->blogs}.blog_id $order";
		}

$number = absint( $this->query_vars['number'] );
		$offset = absint( $this->query_vars['offset'] );
		$limits = '';

if ( ! empty( $number ) ) {
			if ( $offset ) {
				$limits = 'LIMIT ' . $offset . ',' . $number;
			} else {
				$limits = 'LIMIT ' . $number;
			}
		}

if ( $this->query_vars['count'] ) {
			$fields = 'COUNT(*)';
		} else {
			$fields = "{$wpdb->blogs}.blog_id";
		}

// Parse site IDs for an IN clause.
		$site_id = absint( $this->query_vars['ID'] );
		if ( ! empty( $site_id ) ) {
			$this->sql_clauses['where']['ID'] = $wpdb->prepare( "{$wpdb->blogs}.blog_id = %d", $site_id );
		}

// Parse site IDs for an IN clause.
		if ( ! empty( $this->query_vars['site__in'] ) ) {
			$this->sql_clauses['where']['site__in'] = "{$wpdb->blogs}.blog_id IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['site__in'] ) ) . ' )';
		}

// Parse site IDs for a NOT IN clause.
		if ( ! empty( $this->query_vars['site__not_in'] ) ) {
			$this->sql_clauses['where']['site__not_in'] = "{$wpdb->blogs}.blog_id NOT IN ( " . implode( ',', wp_parse_id_list( $this->query_vars['site__not_in'] ) ) . ' )';
		}

$network_id = absint( $this->query_vars['network_id'] );

if ( ! empty( $network_id ) ) {
			$this->sql_clauses['where']['network_id'] = $wpdb->prepare( 'site_id = %d', $network_id );
		}

// Parse site network IDs for an IN clause.
		if ( ! empty( $this->query_vars['network__in'] ) ) {
			$this->sql_clauses['where']['network__in'] = 'site_id IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['network__in'] ) ) . ' )';
		}

// Parse site network IDs for a NOT IN clause.
		if ( ! empty( $this->query_vars['network__not_in'] ) ) {
			$this->sql_clauses['where']['network__not_in'] = 'site_id NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['network__not_in'] ) ) . ' )';
		}

if ( ! empty( $this->query_vars['domain'] ) ) {
			$this->sql_clauses['where']['domain'] = $wpdb->prepare( 'domain = %s', $this->query_vars['domain'] );
		}

// Parse site domain for an IN clause.
		if ( is_array( $this->query_vars['domain__in'] ) ) {
			$this->sql_clauses['where']['domain__in'] = "domain IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['domain__in'] ) ) . "' )";
		}

// Parse site domain for a NOT IN clause.
		if ( is_array( $this->query_vars['domain__not_in'] ) ) {
			$this->sql_clauses['where']['domain__not_in'] = "domain NOT IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['domain__not_in'] ) ) . "' )";
		}

if ( ! empty( $this->query_vars['path'] ) ) {
			$this->sql_clauses['where']['path'] = $wpdb->prepare( 'path = %s', $this->query_vars['path'] );
		}

// Parse site path for an IN clause.
		if ( is_array( $this->query_vars['path__in'] ) ) {
			$this->sql_clauses['where']['path__in'] = "path IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['path__in'] ) ) . "' )";
		}

// Parse site path for a NOT IN clause.
		if ( is_array( $this->query_vars['path__not_in'] ) ) {
			$this->sql_clauses['where']['path__not_in'] = "path NOT IN ( '" . implode( "', '", $wpdb->_escape( $this->query_vars['path__not_in'] ) ) . "' )";
		}

if ( is_numeric( $this->query_vars['archived'] ) ) {
			$archived                               = absint( $this->query_vars['archived'] );
			$this->sql_clauses['where']['archived'] = $wpdb->prepare( 'archived = %s ', absint( $archived ) );
		}

if ( is_numeric( $this->query_vars['mature'] ) ) {
			$mature                               = absint( $this->query_vars['mature'] );
			$this->sql_clauses['where']['mature'] = $wpdb->prepare( 'mature = %d ', $mature );
		}

if ( is_numeric( $this->query_vars['spam'] ) ) {
			$spam                               = absint( $this->query_vars['spam'] );
			$this->sql_clauses['where']['spam'] = $wpdb->prepare( 'spam = %d ', $spam );
		}

if ( is_numeric( $this->query_vars['deleted'] ) ) {
			$deleted                               = absint( $this->query_vars['deleted'] );
			$this->sql_clauses['where']['deleted'] = $wpdb->prepare( 'deleted = %d ', $deleted );
		}

if ( is_numeric( $this->query_vars['public'] ) ) {
			$public                               = absint( $this->query_vars['public'] );
			$this->sql_clauses['where']['public'] = $wpdb->prepare( 'public = %d ', $public );
		}

if ( is_numeric( $this->query_vars['lang_id'] ) ) {
			$lang_id                               = absint( $this->query_vars['lang_id'] );
			$this->sql_clauses['where']['lang_id'] = $wpdb->prepare( 'lang_id = %d ', $lang_id );
		}

// Parse site language IDs for an IN clause.
		if ( ! empty( $this->query_vars['lang__in'] ) ) {
			$this->sql_clauses['where']['lang__in'] = 'lang_id IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['lang__in'] ) ) . ' )';
		}

// Parse site language IDs for a NOT IN clause.
		if ( ! empty( $this->query_vars['lang__not_in'] ) ) {
			$this->sql_clauses['where']['lang__not_in'] = 'lang_id NOT IN ( ' . implode( ',', wp_parse_id_list( $this->query_vars['lang__not_in'] ) ) . ' )';
		}

// Falsey search strings are ignored.
		if ( strlen( $this->query_vars['search'] ) ) {
			$search_columns = array();

if ( $this->query_vars['search_columns'] ) {
				$search_columns = array_intersect( $this->query_vars['search_columns'], array( 'domain', 'path' ) );
			}

if ( ! $search_columns ) {
				$search_columns = array( 'domain', 'path' );
			}

/**
			 * Filters the columns to search in a WP_Site_Query search.
			 *
			 * The default columns include 'domain' and 'path.
			 *
			 * @since 4.6.0
			 *
			 * @param string[]      $search_columns Array of column names to be searched.
			 * @param string        $search         Text being searched.
			 * @param WP_Site_Query $this           The current WP_Site_Query instance.
			 */
			$search_columns = apply_filters( 'site_search_columns', $search_columns, $this->query_vars['search'], $this );

$this->sql_clauses['where']['search'] = $this->get_search_sql( $this->query_vars['search'], $search_columns );
		}

$date_query = $this->query_vars['date_query'];
		if ( ! empty( $date_query ) && is_array( $date_query ) ) {
			$this->date_query                         = new WP_Date_Query( $date_query, 'registered' );
			$this->sql_clauses['where']['date_query'] = preg_replace( '/^\s*AND\s*/', '', $this->date_query->get_sql() );
		}

$join    = '';
		$groupby = '';

if ( ! empty( $this->meta_query_clauses ) ) {
			$join .= $this->meta_query_clauses['join'];

// Strip leading 'AND'.
			$this->sql_clauses['where']['meta_query'] = preg_replace( '/^\s*AND\s*/', '', $this->meta_query_clauses['where'] );

if ( ! $this->query_vars['count'] ) {
				$groupby = "{$wpdb->blogs}.blog_id";
			}
		}

$where = implode( ' AND ', $this->sql_clauses['where'] );

$pieces = array( 'fields', 'join', 'where', 'orderby', 'limits', 'groupby' );

/**
		 * Filters the site query clauses.
		 *
		 * @since 4.6.0
		 *
		 * @param string[]      $pieces An associative array of site query clauses.
		 * @param WP_Site_Query $this   Current instance of WP_Site_Query (passed by reference).
		 */
		$clauses = apply_filters_ref_array( 'sites_clauses', array( compact( $pieces ), &$this ) );

$fields  = isset( $clauses['fields'] ) ? $clauses['fields'] : '';
		$join    = isset( $clauses['join'] ) ? $clauses['join'] : '';
		$where   = isset( $clauses['where'] ) ? $clauses['where'] : '';
		$orderby = isset( $clauses['orderby'] ) ? $clauses['orderby'] : '';
		$limits  = isset( $clauses['limits'] ) ? $clauses['limits'] : '';
		$groupby = isset( $clauses['groupby'] ) ? $clauses['groupby'] : '';

if ( $where ) {
			$where = 'WHERE ' . $where;
		}

if ( $groupby ) {
			$groupby = 'GROUP BY ' . $groupby;
		}

if ( $orderby ) {
			$orderby = "ORDER BY $orderby";
		}

$found_rows = '';
		if ( ! $this->query_vars['no_found_rows'] ) {
			$found_rows = 'SQL_CALC_FOUND_ROWS';
		}

$this->sql_clauses['select']  = "SELECT $found_rows $fields";
		$this->sql_clauses['from']    = "FROM $wpdb->blogs $join";
		$this->sql_clauses['groupby'] = $groupby;
		$this->sql_clauses['orderby'] = $orderby;
		$this->sql_clauses['limits']  = $limits;

$this->request = "{$this->sql_clauses['select']} {$this->sql_clauses['from']} {$where} {$this->sql_clauses['groupby']} {$this->sql_clauses['orderby']} {$this->sql_clauses['limits']}";

if ( $this->query_vars['count'] ) {
			return intval( $wpdb->get_var( $this->request ) );
		}

$site_ids = $wpdb->get_col( $this->request );

return array_map( 'intval', $site_ids );
	}

/**
	 * Populates found_sites and max_num_pages properties for the current query
	 * if the limit clause was used.
	 *
	 * @since 4.6.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 */
	private function set_found_sites() {
		global $wpdb;

if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) {
			/**
			 * Filters the query used to retrieve found site count.
			 *
			 * @since 4.6.0
			 *
			 * @param string        $found_sites_query SQL query. Default 'SELECT FOUND_ROWS()'.
			 * @param WP_Site_Query $site_query        The `WP_Site_Query` instance.
			 */
			$found_sites_query = apply_filters( 'found_sites_query', 'SELECT FOUND_ROWS()', $this );

$this->found_sites = (int) $wpdb->get_var( $found_sites_query );
		}
	}

/**
	 * Used internally to generate an SQL string for searching across multiple columns.
	 *
	 * @since 4.6.0
	 *
	 * @global wpdb  $wpdb WordPress database abstraction object.
	 *
	 * @param string   $string  Search string.
	 * @param string[] $columns Array of columns to search.
	 * @return string Search SQL.
	 */
	protected function get_search_sql( $string, $columns ) {
		global $wpdb;

if ( false !== strpos( $string, '*' ) ) {
			$like = '%' . implode( '%', array_map( array( $wpdb, 'esc_like' ), explode( '*', $string ) ) ) . '%';
		} else {
			$like = '%' . $wpdb->esc_like( $string ) . '%';
		}

$searches = array();
		foreach ( $columns as $column ) {
			$searches[] = $wpdb->prepare( "$column LIKE %s", $like );
		}

return '(' . implode( ' OR ', $searches ) . ')';
	}

/**
	 * Parses and sanitizes 'orderby' keys passed to the site query.
	 *
	 * @since 4.6.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @param string $orderby Alias for the field to order by.
	 * @return string|false Value to used in the ORDER clause. False otherwise.
	 */
	protected function parse_orderby( $orderby ) {
		global $wpdb;

$parsed = false;

switch ( $orderby ) {
			case 'site__in':
				$site__in = implode( ',', array_map( 'absint', $this->query_vars['site__in'] ) );
				$parsed   = "FIELD( {$wpdb->blogs}.blog_id, $site__in )";
				break;
			case 'network__in':
				$network__in = implode( ',', array_map( 'absint', $this->query_vars['network__in'] ) );
				$parsed      = "FIELD( {$wpdb->blogs}.site_id, $network__in )";
				break;
			case 'domain':
			case 'last_updated':
			case 'path':
			case 'registered':
				$parsed = $orderby;
				break;
			case 'network_id':
				$parsed = 'site_id';
				break;
			case 'domain_length':
				$parsed = 'CHAR_LENGTH(domain)';
				break;
			case 'path_length':
				$parsed = 'CHAR_LENGTH(path)';
				break;
			case 'id':
				$parsed = "{$wpdb->blogs}.blog_id";
				break;
		}

if ( ! empty( $parsed ) || empty( $this->meta_query_clauses ) ) {
			return $parsed;
		}

$meta_clauses = $this->meta_query->get_clauses();
		if ( empty( $meta_clauses ) ) {
			return $parsed;
		}

$primary_meta_query = reset( $meta_clauses );
		if ( ! empty( $primary_meta_query['key'] ) && $primary_meta_query['key'] === $orderby ) {
			$orderby = 'meta_value';
		}

switch ( $orderby ) {
			case 'meta_value':
				if ( ! empty( $primary_meta_query['type'] ) ) {
					$parsed = "CAST({$primary_meta_query['alias']}.meta_value AS {$primary_meta_query['cast']})";
				} else {
					$parsed = "{$primary_meta_query['alias']}.meta_value";
				}
				break;
			case 'meta_value_num':
				$parsed = "{$primary_meta_query['alias']}.meta_value+0";
				break;
			default:
				if ( isset( $meta_clauses[ $orderby ] ) ) {
					$meta_clause = $meta_clauses[ $orderby ];
					$parsed      = "CAST({$meta_clause['alias']}.meta_value AS {$meta_clause['cast']})";
				}
		}

return $parsed;
	}

/**
	 * Parses an 'order' query variable and cast it to 'ASC' or 'DESC' as necessary.
	 *
	 * @since 4.6.0
	 *
	 * @param string $order The 'order' query variable.
	 * @return string The sanitized 'order' query variable.
	 */
	protected function parse_order( $order ) {
		if ( ! is_string( $order ) || empty( $order ) ) {
			return 'ASC';
		}

if ( 'ASC' === strtoupper( $order ) ) {
			return 'ASC';
		} else {
			return 'DESC';
		}
	}
}

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