wp_get_state_declarations_with_fallback_border_styles( array $declarations ): array

69function wp_get_state_declarations_with_fallback_border_styles( $declarations ) {70	if ( ! is_array( $declarations ) ) {71		return $declarations;72	}73 74	$has_border_style = isset( $declarations['border-style'] ) && '' !== $declarations['border-style'];75	$has_border_color = isset( $declarations['border-color'] ) && '' !== $declarations['border-color'];76	$has_border_width = isset( $declarations['border-width'] ) && '' !== $declarations['border-width'];77 78	if ( ! $has_border_style && ( $has_border_color || $has_border_width ) ) {79		$declarations['border-style'] = 'solid';80	}81 82	$sides = array( 'top', 'right', 'bottom', 'left' );83	foreach ( $sides as $side ) {84		$side_style_property = "border-$side-style";85		$side_color_property = "border-$side-color";86		$side_width_property = "border-$side-width";87 88		$has_side_style = isset( $declarations[ $side_style_property ] ) && '' !== $declarations[ $side_style_property ];89		$has_side_color = isset( $declarations[ $side_color_property ] ) && '' !== $declarations[ $side_color_property ];90		$has_side_width = isset( $declarations[ $side_width_property ] ) && '' !== $declarations[ $side_width_property ];91 92		if ( ! $has_border_style && ! $has_side_style && ( $has_side_color || $has_side_width ) ) {93			$declarations[ $side_style_property ] = 'solid';94		}95	}96 97	return $declarations;98}