array(); switch ( $args['fields'] ) { case 'count': $orderby = ''; $order = ''; $selects = array( 'COUNT(*)' ); break; default: $selects = array( 't.term_id' ); if ( 'all_with_object_id' === $args['fields'] && ! empty( $args['object_ids'] ) ) { $selects[] = 'tr.object_id'; } 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 string[] $selects An array of fields to select for the terms query. * @param array $args An array of term query arguments. * @param string[] $taxonomies An array of taxonomy names. */ $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"; $distinct = 'DISTINCT'; } $where = implode( ' AND ', $this->sql_clauses['where'] ); $clauses = array( 'fields', 'join', 'where', 'distinct', 'orderby', 'order', 'limits' ); /** * Filters the terms query SQL clauses. * * @since 3.1.0 * * @param string[] $clauses { * Associative array of the clauses for the query. * * @type string $fields The SELECT clause of the query. * @type string $join The JOIN clause of the query. * @type string $where The WHERE clause of the query. * @type string $distinct The DISTINCT clause of the query. * @type string $orderby The ORDER BY clause of the query. * @type string $order The ORDER clause of the query. * @type string $limits The LIMIT clause of the query. * } * @param string[] $taxonomies An array of taxonomy names. * @param array $args An array of term query arguments. */ $clauses = apply_filters( 'terms_clauses', compact( $clauses ), $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']} "; $this->terms = null; /** * Filters the terms array before the query takes place. * * Return a non-null value to bypass WordPress' default term queries. * * @since 5.3.0 * * @param array|null $terms Return an array of term data to short-circuit WP's term query, * or null to allow WP queries to run normally. * @param WP_Term_Query $query The WP_Term_Query instance, passed by reference. */ $this->terms = apply_filters_ref_array( 'terms_pre_query', array( $this->terms, &$this ) ); if ( null !== $this->terms ) { return $this->terms; } // $args can be anything. Only use the args defined in defaults to compute the key. $cache_args = wp_array_slice_assoc( $args, array_keys( $this->query_var_defaults ) ); unset( $cache_args['pad_counts'], $cache_args['update_term_meta_cache'] ); if ( 'count' !== $_fields && 'all_with_object_id' !== $_fields ) { $cache_args['fields'] = 'all'; } $key = md5( serialize( $cache_args ) . 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 ( 'ids' === $_fields ) { $term_ids = wp_list_pluck( $cache, 'term_id' ); $cache = array_map( 'intval', $term_ids ); } elseif ( 'count' !== $_fields ) { $term_ids = wp_list_pluck( $cache, 'term_id' ); _prime_term_caches( $term_ids, $args['update_term_meta_cache'] ); $term_objects = $this->populate_terms( $cache ); $cache = $this->format_terms( $term_objects, $_fields ); } $this->terms = $cache; return $this->terms; } if ( 'count' === $_fields ) { $count = $wpdb->get_var( $this->request ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared wp_cache_set( $cache_key, $count, 'terms' ); return $count; } $terms = $wpdb->get_results( $this->request ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared if ( empty( $terms ) ) { wp_cache_add( $cache_key, array(), 'terms' ); return array(); } $term_ids = wp_list_pluck( $terms, 'term_id' ); _prime_term_caches( $term_ids, false ); $term_objects = $this->populate_terms( $terms ); if ( $child_of ) { foreach ( $taxonomies as $_tax ) { $children = _get_term_hierarchy( $_tax ); if ( ! empty( $children ) ) { $term_objects = _get_term_children( $child_of, $term_objects, $_tax ); } } } // Update term counts to include children. if ( $args['pad_counts'] && 'all' === $_fields ) { foreach ( $taxonomies as $_tax ) { _pad_term_counts( $term_objects, $_tax ); } } // Make sure we show empty categories that have children. if ( $hierarchical && $args['hide_empty'] && is_array( $term_objects ) ) { foreach ( $term_objects 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( $term_objects[ $k ] ); } } } /* * When querying for terms connected to objects, we may get * duplicate results. The duplicates should be preserved if * `$fields` is 'all_with_object_id', but should otherwise be * removed. */ if ( ! empty( $args['object_ids'] ) && 'all_with_object_id' !== $_fields ) { $_tt_ids = array(); $_terms = array(); foreach ( $terms as $term ) { if ( isset( $_tt_ids[ $term->term_id ] ) ) { continue; } $_tt_ids[ $term->term_id ] = 1; $_terms[] = $term; } $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(); $term_objects = array(); } else { $terms = array_slice( $terms, $offset, $number, true ); $term_objects = array_slice( $term_objects, $offset, $number, true ); } } // Prime termmeta cache. if ( $args['update_term_meta_cache'] ) { $term_ids = wp_list_pluck( $term_objects, 'term_id' ); update_termmeta_cache( $term_ids ); } wp_cache_add( $cache_key, $terms, 'terms' ); $terms = $this->format_terms( $term_objects, $_fields ); $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 term query arguments. * @param string[] $taxonomies An array of taxonomy names. */ $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; } /** * Format response depending on field requested. * * @since 6.0.0 * * @param WP_Term[] $term_objects Array of term objects. * @param string $_fields Field to format. * * @return WP_Term[]|int[]|string[] Array of terms / strings / ints depending on field requested. */ protected function format_terms( $term_objects, $_fields ) { $_terms = array(); if ( 'id=>parent' === $_fields ) { foreach ( $term_objects as $term ) { $_terms[ $term->term_id ] = $term->parent; } } elseif ( 'ids' === $_fields ) { foreach ( $term_objects as $term ) { $_terms[] = (int) $term->term_id; } } elseif ( 'tt_ids' === $_fields ) { foreach ( $term_objects as $term ) { $_terms[] = (int) $term->term_taxonomy_id; } } elseif ( 'names' === $_fields ) { foreach ( $term_objects as $term ) { $_terms[] = $term->name; } } elseif ( 'slugs' === $_fields ) { foreach ( $term_objects as $term ) { $_terms[] = $term->slug; } } elseif ( 'id=>name' === $_fields ) { foreach ( $term_objects as $term ) { $_terms[ $term->term_id ] = $term->name; } } elseif ( 'id=>slug' === $_fields ) { foreach ( $term_objects as $term ) { $_terms[ $term->term_id ] = $term->slug; } } elseif ( 'all' === $_fields || 'all_with_object_id' === $_fields ) { $_terms = $term_objects; } return $_terms; } /** * 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 $search Search string. * @return string Search SQL. */ protected function get_search_sql( $search ) { global $wpdb; $like = '%' . $wpdb->esc_like( $search ) . '%'; 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 Object[]|int[] $terms List of objects or term ids. * @return WP_Term[] Array of `WP_Term` objects. */ protected function populate_terms( $terms ) { $term_objects = array(); if ( ! is_array( $terms ) ) { return $term_objects; } foreach ( $terms as $key => $term_data ) { if ( is_object( $term_data ) && property_exists( $term_data, 'term_id' ) ) { $term = get_term( $term_data->term_id ); if ( property_exists( $term_data, 'object_id' ) ) { $term->object_id = (int) $term_data->object_id; } } else { $term = get_term( $term_data ); } if ( $term instanceof WP_Term ) { $term_objects[ $key ] = $term; } } return $term_objects; } }