Automattic / jetpack

							$slug_count = count( $existing_term_slugs );

							if ( $slug_count > 1 ) {

								$remove_url = add_query_arg( $tax_query_var, urlencode( implode( '+', array_diff( $existing_term_slugs, array( $item['key'] ) ) ) ) );

							} else {

								$remove_url = remove_query_arg( $tax_query_var );

							}

						}

						break;

							$post_type_count = count( $post_types );

							// For the right 'remove filter' url, we need to remove the post type from the array, or remove the param entirely if it's the only one

							if ( $post_type_count > 1 ) {

								$remove_url = add_query_arg( 'post_type', urlencode_deep( array_diff( $post_types, array( $item['key'] ) ) ) );

							} else {

								$remove_url = remove_query_arg( 'post_type' );

							}

						}

						break;