WP_Customize_Manager::_sanitize_background_setting( string $value, WP_Customize_Setting $setting ): string|WP_Error

6026	public function _sanitize_background_setting( $value, $setting ) {6027		if ( 'background_repeat' === $setting->id ) {6028			if ( ! in_array( $value, array( 'repeat-x', 'repeat-y', 'repeat', 'no-repeat' ), true ) ) {6029				return new WP_Error( 'invalid_value', __( 'Invalid value for background repeat.' ) );6030			}6031		} elseif ( 'background_attachment' === $setting->id ) {6032			if ( ! in_array( $value, array( 'fixed', 'scroll' ), true ) ) {6033				return new WP_Error( 'invalid_value', __( 'Invalid value for background attachment.' ) );6034			}6035		} elseif ( 'background_position_x' === $setting->id ) {6036			if ( ! in_array( $value, array( 'left', 'center', 'right' ), true ) ) {6037				return new WP_Error( 'invalid_value', __( 'Invalid value for background position X.' ) );6038			}6039		} elseif ( 'background_position_y' === $setting->id ) {6040			if ( ! in_array( $value, array( 'top', 'center', 'bottom' ), true ) ) {6041				return new WP_Error( 'invalid_value', __( 'Invalid value for background position Y.' ) );6042			}6043		} elseif ( 'background_size' === $setting->id ) {6044			if ( ! in_array( $value, array( 'auto', 'contain', 'cover' ), true ) ) {6045				return new WP_Error( 'invalid_value', __( 'Invalid value for background size.' ) );6046			}6047		} elseif ( 'background_preset' === $setting->id ) {6048			if ( ! in_array( $value, array( 'default', 'fill', 'fit', 'repeat', 'custom' ), true ) ) {6049				return new WP_Error( 'invalid_value', __( 'Invalid value for background size.' ) );6050			}6051		} elseif ( 'background_image' === $setting->id || 'background_image_thumb' === $setting->id ) {6052			$value = empty( $value ) ? '' : sanitize_url( $value );6053		} else {6054			return new WP_Error( 'unrecognized_setting', __( 'Unrecognized background setting.' ) );6055		}6056		return $value;6057	}