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Array or query string of term query parameters. Default empty. * * @type string|array $taxonomy Taxonomy name, or array of taxonomies, to which results should * be limited. * @type int|array $object_ids Optional. Object ID, or array of object IDs. Results will be * limited to terms associated with these objects. * @type string $orderby Field(s) to order terms by. Accepts term fields ('name', * 'slug', 'term_group', 'term_id', 'id', 'description', 'parent'), * 'count' for term taxonomy count, 'include' to match the * 'order' of the $include param, 'slug__in' to match the * 'order' of the $slug param, 'meta_value', 'meta_value_num', * the value of `$meta_key`, the array keys of `$meta_query`, or * 'none' to omit the ORDER BY clause. Defaults to 'name'. * @type string $order Whether to order terms in ascending or descending order. * Accepts 'ASC' (ascending) or 'DESC' (descending). * Default 'ASC'. * @type bool|int $hide_empty Whether to hide terms not assigned to any posts. Accepts * 1|true or 0|false. Default 1|true. * @type array|string $include Array or comma/space-separated string of term ids to include. * Default empty array. * @type array|string $exclude Array or comma/space-separated string of term ids to exclude. * If $include is non-empty, $exclude is ignored. * Default empty array. * @type array|string $exclude_tree Array or comma/space-separated string of term ids to exclude * along with all of their descendant terms. If $include is * non-empty, $exclude_tree is ignored. Default empty array. * @type int|string $number Maximum number of terms to return. Accepts ''|0 (all) or any * positive number. Default ''|0 (all). Note that $number may * not return accurate results when coupled with $object_ids. * See #41796 for details. * @type int $offset The number by which to offset the terms query. Default empty. * @type string $fields Term fields to query for. Accepts 'all' (returns an array of * complete term objects), 'all_with_object_id' (returns an * array of term objects with the 'object_id' param; only works * when the `$fields` parameter is 'object_ids' ), 'ids' * (returns an array of ids), 'tt_ids' (returns an array of * term taxonomy ids), 'id=>parent' (returns an associative * array with ids as keys, parent term IDs as values), 'names' * (returns an array of term names), 'count' (returns the number * of matching terms), 'id=>name' (returns an associative array * with ids as keys, term names as values), or 'id=>slug' * (returns an associative array with ids as keys, term slugs * as values). Default 'all'. * @type bool $count Whether to return a term count (true) or array of term objects * (false). Will take precedence over `$fields` if true. * Default false. * @type string|array $name Optional. Name or array of names to return term(s) for. * Default empty. * @type string|array $slug Optional. Slug or array of slugs to return term(s) for. * Default empty. * @type int|array $term_taxonomy_id Optional. Term taxonomy ID, or array of term taxonomy IDs, * to match when querying terms. * @type bool $hierarchical Whether to include terms that have non-empty descendants (even * if $hide_empty is set to true). Default true. * @type string $search Search criteria to match terms. Will be SQL-formatted with * wildcards before and after. Default empty. * @type string $name__like Retrieve terms with criteria by which a term is LIKE * `$name__like`. Default empty. * @type string $description__like Retrieve terms where the description is LIKE * `$description__like`. Default empty. * @type bool $pad_counts Whether to pad the quantity of a term's children in the * quantity of each term's "count" object variable. * Default false. * @type string $get Whether to return terms regardless of ancestry or whether the * terms are empty. Accepts 'all' or empty (disabled). * Default empty. * @type int $child_of Term ID to retrieve child terms of. If multiple taxonomies * are passed, $child_of is ignored. Default 0. * @type int|string $parent Parent term ID to retrieve direct-child terms of. * Default empty. * @type bool $childless True to limit results to terms that have no children. * This parameter has no effect on non-hierarchical taxonomies. * Default false. * @type string $cache_domain Unique cache key to be produced when this query is stored in * an object cache. Default is 'core'. * @type bool $update_term_meta_cache Whether to prime meta caches for matched terms. Default true. * @type array $meta_query Optional. Meta query clauses to limit retrieved terms by. * See `WP_Meta_Query`. Default empty. * @type string $meta_key Limit terms to those matching a specific metadata key. * Can be used in conjunction with `$meta_value`. Default empty. * @type string $meta_value Limit terms to those matching a specific metadata value. * Usually used in conjunction with `$meta_key`. Default empty. * @type string $meta_type MySQL data type that the `$meta_value` 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( 'taxonomy' => null, 'object_ids' => null, 'orderby' => 'name', 'order' => 'ASC', 'hide_empty' => true, 'include' => array(), 'exclude' => array(), 'exclude_tree' => array(), 'number' => '', 'offset' => '', 'fields' => 'all', 'count' => false, 'name' => '', 'slug' => '', 'term_taxonomy_id' => '', 'hierarchical' => true, 'search' => '', 'name__like' => '', 'description__like' => '', 'pad_counts' => false, 'get' => '', 'child_of' => 0, 'parent' => '', 'childless' => false, 'cache_domain' => 'core', 'update_term_meta_cache' => true, 'meta_query' => '', 'meta_key' => '', 'meta_value' => '', 'meta_type' => '', 'meta_compare' => '', ); if ( ! empty( $query ) ) { $this->query( $query ); } } /** * Parse arguments passed to the term query with default query parameters. * * @since 4.6.0 * * @param string|array $query WP_Term_Query arguments. See WP_Term_Query::__construct() */ public function parse_query( $query = '' ) { if ( empty( $query ) ) { $query = $this->query_vars; } $taxonomies = isset( $query['taxonomy'] ) ? (array) $query['taxonomy'] : null; /** * Filters the terms query default arguments. * * Use {@see 'get_terms_args'} to filter the passed arguments. * * @since 4.4.0 * * @param array $defaults An array of default get_terms() arguments. * @param array $taxonomies An array of taxonomies. */ $this->query_var_defaults = apply_filters( 'get_terms_defaults', $this->query_var_defaults, $taxonomies ); $query = wp_parse_args( $query, $this->query_var_defaults ); $query['number'] = absint( $query['number'] ); $query['offset'] = absint( $query['offset'] ); // 'parent' overrides 'child_of'. if ( 0 < intval( $query['parent'] ) ) { $query['child_of'] = false; } if ( 'all' == $query['get'] ) { $query['childless'] = false; $query['child_of'] = 0; $query['hide_empty'] = 0; $query['hierarchical'] = false; $query['pad_counts'] = false; } $query['taxonomy'] = $taxonomies; $this->query_vars = $query; /** * Fires after term query vars have been parsed. * * @since 4.6.0 * * @param WP_Term_Query $this Current instance of WP_Term_Query. */ do_action( 'parse_term_query', $this ); } /** * Sets up the query for retrieving terms. * * @since 4.6.0 * * @param string|array $query Array or URL query string of parameters. * @return array|int List of terms, or number of terms when 'count' is passed as a query var. */ public function query( $query ) { $this->query_vars = wp_parse_args( $query ); return $this->get_terms(); } /** * Get terms, based on query_vars. * * @since 4.6.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @return array List of terms. */ public function get_terms() { global $wpdb; $this->parse_query( $this->query_vars ); $args = &$this->query_vars; // Set up meta_query so it's available to 'pre_get_terms'. $this->meta_query = new WP_Meta_Query(); $this->meta_query->parse_query_vars( $args ); /** * Fires before terms are retrieved. * * @since 4.6.0 * * @param WP_Term_Query $this Current instance of WP_Term_Query. */ do_action( 'pre_get_terms', $this ); $taxonomies = (array) $args['taxonomy']; // Save queries by not crawling the tree in the case of multiple taxes or a flat tax. $has_hierarchical_tax = false; if ( $taxonomies ) { foreach ( $taxonomies as $_tax ) { if ( is_taxonomy_hierarchical( $_tax ) ) { $has_hierarchical_tax = true; } } } if ( ! $has_hierarchical_tax ) { $args['hierarchical'] = false; $args['pad_counts'] = false; } // 'parent' overrides 'child_of'. if ( 0 < intval( $args['parent'] ) ) { $args['child_of'] = false; } if ( 'all' == $args['get'] ) { $args['childless'] = false; $args['child_of'] = 0; $args['hide_empty'] = 0; $args['hierarchical'] = false; $args['pad_counts'] = false; } /** * Filters the terms query arguments. * * @since 3.1.0 * * @param array $args An array of get_terms() arguments. * @param array $taxonomies An array of taxonomies. */ $args = apply_filters( 'get_terms_args', $args, $taxonomies ); // Avoid the query if the queried parent/child_of term has no descendants. $child_of = $args['child_of']; $parent = $args['parent']; if ( $child_of ) { $_parent = $child_of; } elseif ( $parent ) { $_parent = $parent; } else { $_parent = false; } if ( $_parent ) { $in_hierarchy = false; foreach ( $taxonomies as $_tax ) { $hierarchy = _get_term_hierarchy( $_tax ); if ( isset( $hierarchy[ $_parent ] ) ) { $in_hierarchy = true; } } if ( ! $in_hierarchy ) { return array(); } } // 'term_order' is a legal sort order only when joining the relationship table. $_orderby = $this->query_vars['orderby']; if ( 'term_order' === $_orderby && empty( $this->query_vars['object_ids'] ) ) { $_orderby = 'term_id'; } $orderby = $this->parse_orderby( $_orderby ); if ( $orderby ) { $orderby = "ORDER BY $orderby"; } $order = $this->parse_order( $this->query_vars['order'] ); if ( $taxonomies ) { $this->sql_clauses['where']['taxonomy'] = "tt.taxonomy IN ('" . implode( "', '", array_map( 'esc_sql', $taxonomies ) ) . "')"; } $exclude = $args['exclude']; $exclude_tree = $args['exclude_tree']; $include = $args['include']; $inclusions = ''; if ( ! empty( $include ) ) { $exclude = ''; $exclude_tree = ''; $inclusions = implode( ',', wp_parse_id_list( $include ) ); } if ( ! empty( $inclusions ) ) { $this->sql_clauses['where']['inclusions'] = 't.term_id IN ( ' . $inclusions . ' )'; } $exclusions = array(); if ( ! empty( $exclude_tree ) ) { $exclude_tree = wp_parse_id_list( $exclude_tree ); $excluded_children = $exclude_tree; foreach ( $exclude_tree as $extrunk ) { $excluded_children = array_merge( $excluded_children, (array) get_terms( reset( $taxonomies ), array( 'child_of' => intval( $extrunk ), 'fields' => 'ids', 'hide_empty' => 0 ) ) ); } $exclusions = array_merge( $excluded_children, $exclusions ); } if ( ! empty( $exclude ) ) { $exclusions = array_merge( wp_parse_id_list( $exclude ), $exclusions ); } // 'childless' terms are those without an entry in the flattened term hierarchy. $childless = (bool) $args['childless']; if ( $childless ) { foreach ( $taxonomies as $_tax ) { $term_hierarchy = _get_term_hierarchy( $_tax ); $exclusions = array_merge( array_keys( $term_hierarchy ), $exclusions ); } } if ( ! empty( $exclusions ) ) { $exclusions = 't.term_id NOT IN (' . implode( ',', array_map( 'intval', $exclusions ) ) . ')'; } else { $exclusions = ''; } /** * Filters the terms to exclude from the terms query. * * @since 2.3.0 * * @param string $exclusions `NOT IN` clause of the terms query. * @param array $args An array of terms query arguments. * @param array $taxonomies An array of taxonomies. */ $exclusions = apply_filters( 'list_terms_exclusions', $exclusions, $args, $taxonomies ); if ( ! empty( $exclusions ) ) { // Must do string manipulation here for backward compatibility with filter. $this->sql_clauses['where']['exclusions'] = preg_replace( '/^\s*AND\s*/', '', $exclusions ); } if ( ( ! empty( $args['name'] ) ) || ( is_string( $args['name'] ) && 0 !== strlen( $args['name'] ) ) ) { $names = (array) $args['name']; foreach ( $names as &$_name ) { // `sanitize_term_field()` returns slashed data. $_name = stripslashes( sanitize_term_field( 'name', $_name, 0, reset( $taxonomies ), 'db' ) ); } $this->sql_clauses['where']['name'] = "t.name IN ('" . implode( "', '", array_map( 'esc_sql', $names ) ) . "')"; } if ( ( ! empty( $args['slug'] ) ) || ( is_string( $args['slug'] ) && 0 !== strlen( $args['slug'] ) ) ) { if ( is_array( $args['slug'] ) ) { $slug = array_map( 'sanitize_title', $args['slug'] ); $this->sql_clauses['where']['slug'] = "t.slug IN ('" . implode( "', '", $slug ) . "')"; } else { $slug = sanitize_title( $args['slug'] ); $this->sql_clauses['where']['slug'] = "t.slug = '$slug'"; } } if ( ! empty( $args['term_taxonomy_id'] ) ) { if ( is_array( $args['term_taxonomy_id'] ) ) { $tt_ids = implode( ',', array_map( 'intval', $args['term_taxonomy_id'] ) ); $this->sql_clauses['where']['term_taxonomy_id'] = "tt.term_taxonomy_id IN ({$tt_ids})"; } else { $this->sql_clauses['where']['term_taxonomy_id'] = $wpdb->prepare( "tt.term_taxonomy_id = %d", $args['term_taxonomy_id'] ); } } if ( ! empty( $args['name__like'] ) ) { $this->sql_clauses['where']['name__like'] = $wpdb->prepare( "t.name LIKE %s", '%' . $wpdb->esc_like( $args['name__like'] ) . '%' ); } if ( ! empty( $args['description__like'] ) ) { $this->sql_clauses['where']['description__like'] = $wpdb->prepare( "tt.description LIKE %s", '%' . $wpdb->esc_like( $args['description__like'] ) . '%' ); } if ( ! empty( $args['object_ids'] ) ) { $object_ids = $args['object_ids']; if ( ! is_array( $object_ids ) ) { $object_ids = array( $object_ids ); } $object_ids = implode( ', ', array_map( 'intval', $object_ids ) ); $this->sql_clauses['where']['object_ids'] = "tr.object_id IN ($object_ids)"; } /* * When querying for object relationships, the 'count > 0' check * added by 'hide_empty' is superfluous. */ if ( ! empty( $args['object_ids'] ) ) { $args['hide_empty'] = false; } if ( '' !== $parent ) { $parent = (int) $parent; $this->sql_clauses['where']['parent'] = "tt.parent = '$parent'"; } $hierarchical = $args['hierarchical']; if ( 'count' == $args['fields'] ) { $hierarchical = false; } if ( $args['hide_empty'] && !$hierarchical ) { $this->sql_clauses['where']['count'] = 'tt.count > 0'; } $number = $args['number']; $offset = $args['offset']; // Don't limit the query results when we have to descend the family tree. if ( $number && ! $hierarchical && ! $child_of && '' === $parent ) { if ( $offset ) { $limits = 'LIMIT ' . $offset . ',' . $number; } else { $limits = 'LIMIT ' . $number; } } else { $limits = ''; } if ( ! empty( $args['search'] ) ) { $this->sql_clauses['where']['search'] = $this->get_search_sql( $args['search'] ); } // Meta query support. $join = ''; $distinct = ''; // Reparse meta_query query_vars, in case they were modified in a 'pre_get_terms' callback. $this->meta_query->parse_query_vars( $this->query_vars ); $mq_sql = $this->meta_query->get_sql( 'term', 't', 'term_id' ); $meta_clauses = $this->meta_query->get_clauses(); if ( ! empty( $meta_clauses ) ) { $join .= $mq_sql['join']; $this->sql_clauses['where']['meta_query'] = preg_replace( '/^\s*AND\s*/', '', $mq_sql['where'] ); $distinct .= "DISTINCT"; } $selects = array(); switch ( $args['fields'] ) { case 'all': case 'all_with_object_id' : case 'tt_ids' : case 'slugs' : $selects = array( 't.*', 'tt.*' ); if ( 'all_with_object_id' === $args['fields'] && ! empty( $args['object_ids'] ) ) { $selects[] = 'tr.object_id'; } break; case 'ids': case 'id=>parent': $selects = array( 't.term_id', 'tt.parent', 'tt.count', 'tt.taxonomy' ); break; case 'names': $selects = array( 't.term_id', 'tt.parent', 'tt.count', 't.name', 'tt.taxonomy' ); break; case 'count': $orderby = ''; $order = ''; $selects = array( 'COUNT(*)' ); break; case 'id=>name': $selects = array( 't.term_id', 't.name', 'tt.count', 'tt.taxonomy' ); break; case 'id=>slug': $selects = array( 't.term_id', 't.slug', 'tt.count', 'tt.taxonomy' ); break; } $_fields = $args['fields']; /** * Filters the fields to select in the terms query. * * Field lists modified using this filter will only modify the term fields returned * by the function when the `$fields` parameter set to 'count' or 'all'. In all other * cases, the term fields in the results array will be determined by the `$fields` * parameter alone. * * Use of this filter can result in unpredictable behavior, and is not recommended. * * @since 2.8.0 * * @param array $selects An array of fields to select for the terms query. * @param array $args An array of term query arguments. * @param array $taxonomies An array of taxonomies. */ $fields = implode( ', ', apply_filters( 'get_terms_fields', $selects, $args, $taxonomies ) ); $join .= " INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id"; if ( ! empty( $this->query_vars['object_ids'] ) ) { $join .= " INNER JOIN {$wpdb->term_relationships} AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id"; } $where = implode( ' AND ', $this->sql_clauses['where'] ); /** * Filters the terms query SQL clauses. * * @since 3.1.0 * * @param array $pieces Terms query SQL clauses. * @param array $taxonomies An array of taxonomies. * @param array $args An array of terms query arguments. */ $clauses = apply_filters( 'terms_clauses', compact( 'fields', 'join', 'where', 'distinct', 'orderby', 'order', 'limits' ), $taxonomies, $args ); $fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : ''; $join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : ''; $where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : ''; $distinct = isset( $clauses[ 'distinct' ] ) ? $clauses[ 'distinct' ] : ''; $orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : ''; $order = isset( $clauses[ 'order' ] ) ? $clauses[ 'order' ] : ''; $limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : ''; if ( $where ) { $where = "WHERE $where"; } $this->sql_clauses['select'] = "SELECT $distinct $fields"; $this->sql_clauses['from'] = "FROM $wpdb->terms AS t $join"; $this->sql_clauses['orderby'] = $orderby ? "$orderby $order" : ''; $this->sql_clauses['limits'] = $limits; $this->request = "{$this->sql_clauses['select']} {$this->sql_clauses['from']} {$where} {$this->sql_clauses['orderby']} {$this->sql_clauses['limits']}"; // $args can be anything. Only use the args defined in defaults to compute the key. $key = md5( serialize( wp_array_slice_assoc( $args, array_keys( $this->query_var_defaults ) ) ) . serialize( $taxonomies ) . $this->request ); $last_changed = wp_cache_get_last_changed( 'terms' ); $cache_key = "get_terms:$key:$last_changed"; $cache = wp_cache_get( $cache_key, 'terms' ); if ( false !== $cache ) { if ( 'all' === $_fields || 'all_with_object_id' === $_fields ) { $cache = $this->populate_terms( $cache ); } $this->terms = $cache; return $this->terms; } if ( 'count' == $_fields ) { $count = $wpdb->get_var( $this->request ); wp_cache_set( $cache_key, $count, 'terms' ); return $count; } $terms = $wpdb->get_results( $this->request ); if ( 'all' == $_fields || 'all_with_object_id' === $_fields ) { update_term_cache( $terms ); } // Prime termmeta cache. if ( $args['update_term_meta_cache'] ) { $term_ids = wp_list_pluck( $terms, 'term_id' ); update_termmeta_cache( $term_ids ); } if ( empty( $terms ) ) { wp_cache_add( $cache_key, array(), 'terms', DAY_IN_SECONDS ); return array(); } if ( $child_of ) { foreach ( $taxonomies as $_tax ) { $children = _get_term_hierarchy( $_tax ); if ( ! empty( $children ) ) { $terms = _get_term_children( $child_of, $terms, $_tax ); } } } // Update term counts to include children. if ( $args['pad_counts'] && 'all' == $_fields ) { foreach ( $taxonomies as $_tax ) { _pad_term_counts( $terms, $_tax ); } } // Make sure we show empty categories that have children. if ( $hierarchical && $args['hide_empty'] && is_array( $terms ) ) { foreach ( $terms as $k => $term ) { if ( ! $term->count ) { $children = get_term_children( $term->term_id, $term->taxonomy ); if ( is_array( $children ) ) { foreach ( $children as $child_id ) { $child = get_term( $child_id, $term->taxonomy ); if ( $child->count ) { continue 2; } } } // It really is empty. unset( $terms[ $k ] ); } } } /* * When querying for terms connected to objects, we may get * duplicate results. The duplicates should be preserved if * `$fields` is 'all_with_object_id', but should otherwise be * removed. */ if ( ! empty( $args['object_ids'] ) && 'all_with_object_id' != $_fields ) { $_tt_ids = $_terms = array(); foreach ( $terms as $term ) { if ( isset( $_tt_ids[ $term->term_id ] ) ) { continue; } $_tt_ids[ $term->term_id ] = 1; $_terms[] = $term; } $terms = $_terms; } $_terms = array(); if ( 'id=>parent' == $_fields ) { foreach ( $terms as $term ) { $_terms[ $term->term_id ] = $term->parent; } } elseif ( 'ids' == $_fields ) { foreach ( $terms as $term ) { $_terms[] = (int) $term->term_id; } } elseif ( 'tt_ids' == $_fields ) { foreach ( $terms as $term ) { $_terms[] = (int) $term->term_taxonomy_id; } } elseif ( 'names' == $_fields ) { foreach ( $terms as $term ) { $_terms[] = $term->name; } } elseif ( 'slugs' == $_fields ) { foreach ( $terms as $term ) { $_terms[] = $term->slug; } } elseif ( 'id=>name' == $_fields ) { foreach ( $terms as $term ) { $_terms[ $term->term_id ] = $term->name; } } elseif ( 'id=>slug' == $_fields ) { foreach ( $terms as $term ) { $_terms[ $term->term_id ] = $term->slug; } } if ( ! empty( $_terms ) ) { $terms = $_terms; } // Hierarchical queries are not limited, so 'offset' and 'number' must be handled now. if ( $hierarchical && $number && is_array( $terms ) ) { if ( $offset >= count( $terms ) ) { $terms = array(); } else { $terms = array_slice( $terms, $offset, $number, true ); } } wp_cache_add( $cache_key, $terms, 'terms', DAY_IN_SECONDS ); if ( 'all' === $_fields || 'all_with_object_id' === $_fields ) { $terms = $this->populate_terms( $terms ); } $this->terms = $terms; return $this->terms; } /** * Parse and sanitize 'orderby' keys passed to the term query. * * @since 4.6.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $orderby_raw Alias for the field to order by. * @return string|false Value to used in the ORDER clause. False otherwise. */ protected function parse_orderby( $orderby_raw ) { $_orderby = strtolower( $orderby_raw ); $maybe_orderby_meta = false; if ( in_array( $_orderby, array( 'term_id', 'name', 'slug', 'term_group' ), true ) ) { $orderby = "t.$_orderby"; } elseif ( in_array( $_orderby, array( 'count', 'parent', 'taxonomy', 'term_taxonomy_id', 'description' ), true ) ) { $orderby = "tt.$_orderby"; } elseif ( 'term_order' === $_orderby ) { $orderby = 'tr.term_order'; } elseif ( 'include' == $_orderby && ! empty( $this->query_vars['include'] ) ) { $include = implode( ',', wp_parse_id_list( $this->query_vars['include'] ) ); $orderby = "FIELD( t.term_id, $include )"; } elseif ( 'slug__in' == $_orderby && ! empty( $this->query_vars['slug'] ) && is_array( $this->query_vars['slug'] ) ) { $slugs = implode( "', '", array_map( 'sanitize_title_for_query', $this->query_vars['slug'] ) ); $orderby = "FIELD( t.slug, '" . $slugs . "')"; } elseif ( 'none' == $_orderby ) { $orderby = ''; } elseif ( empty( $_orderby ) || 'id' == $_orderby || 'term_id' === $_orderby ) { $orderby = 't.term_id'; } else { $orderby = 't.name'; // This may be a value of orderby related to meta. $maybe_orderby_meta = true; } /** * Filters the ORDERBY clause of the terms query. * * @since 2.8.0 * * @param string $orderby `ORDERBY` clause of the terms query. * @param array $args An array of terms query arguments. * @param array $taxonomies An array of taxonomies. */ $orderby = apply_filters( 'get_terms_orderby', $orderby, $this->query_vars, $this->query_vars['taxonomy'] ); // Run after the 'get_terms_orderby' filter for backward compatibility. if ( $maybe_orderby_meta ) { $maybe_orderby_meta = $this->parse_orderby_meta( $_orderby ); if ( $maybe_orderby_meta ) { $orderby = $maybe_orderby_meta; } } return $orderby; } /** * Generate the ORDER BY clause for an 'orderby' param that is potentially related to a meta query. * * @since 4.6.0 * * @param string $orderby_raw Raw 'orderby' value passed to WP_Term_Query. * @return string ORDER BY clause. */ protected function parse_orderby_meta( $orderby_raw ) { $orderby = ''; // Tell the meta query to generate its SQL, so we have access to table aliases. $this->meta_query->get_sql( 'term', 't', 'term_id' ); $meta_clauses = $this->meta_query->get_clauses(); if ( ! $meta_clauses || ! $orderby_raw ) { return $orderby; } $allowed_keys = array(); $primary_meta_key = null; $primary_meta_query = reset( $meta_clauses ); if ( ! empty( $primary_meta_query['key'] ) ) { $primary_meta_key = $primary_meta_query['key']; $allowed_keys[] = $primary_meta_key; } $allowed_keys[] = 'meta_value'; $allowed_keys[] = 'meta_value_num'; $allowed_keys = array_merge( $allowed_keys, array_keys( $meta_clauses ) ); if ( ! in_array( $orderby_raw, $allowed_keys, true ) ) { return $orderby; } switch( $orderby_raw ) { case $primary_meta_key: case 'meta_value': if ( ! empty( $primary_meta_query['type'] ) ) { $orderby = "CAST({$primary_meta_query['alias']}.meta_value AS {$primary_meta_query['cast']})"; } else { $orderby = "{$primary_meta_query['alias']}.meta_value"; } break; case 'meta_value_num': $orderby = "{$primary_meta_query['alias']}.meta_value+0"; break; default: if ( array_key_exists( $orderby_raw, $meta_clauses ) ) { // $orderby corresponds to a meta_query clause. $meta_clause = $meta_clauses[ $orderby_raw ]; $orderby = "CAST({$meta_clause['alias']}.meta_value AS {$meta_clause['cast']})"; } break; } return $orderby; } /** * Parse 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 'DESC'; } if ( 'ASC' === strtoupper( $order ) ) { return 'ASC'; } else { return 'DESC'; } } /** * Used internally to generate a SQL string related to the 'search' parameter. * * @since 4.6.0 * * @global wpdb $wpdb WordPress database abstraction object. * * @param string $string * @return string */ protected function get_search_sql( $string ) { global $wpdb; $like = '%' . $wpdb->esc_like( $string ) . '%'; return $wpdb->prepare( '((t.name LIKE %s) OR (t.slug LIKE %s))', $like, $like ); } /** * Creates an array of term objects from an array of term IDs. * * Also discards invalid term objects. * * @since 4.9.8 * * @param array $term_ids Term IDs. * @return array */ protected function populate_terms( $term_ids ) { $terms = array(); if ( ! is_array( $term_ids ) ) { return $terms; } foreach ( $term_ids as $key => $term_id ) { $term = get_term( $term_id ); if ( $term instanceof WP_Term ) { $terms[ $key ] = $term; } } return $terms; } }