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Source View: rest_query_var-{$key}

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Line Code
858                /**
859                 * Filters the query_vars used in get_items() for the constructed query.
860                 *
861                 * The dynamic portion of the hook name, `$key`, refers to the query_var key.
862                 *
863                 * @since 4.7.0
864                 *
865                 * @param string $value The query_var value.
866                 */
867                $query_args[ $key ] = apply_filters( "rest_query_var-{$key}", $value );
868           }
869
870           if ( 'post' !== $this->post_type || ! isset( $query_args['ignore_sticky_posts'] ) ) {
871                $query_args['ignore_sticky_posts'] = true;
872           }
873
874           // Map to proper WP_Query orderby param.
875           if ( isset( $query_args['orderby'] ) && isset( $request['orderby'] ) ) {
876                $orderby_mappings = array(