Title: 5.9.1 | Developer.WordPress.org

---

# New and updated in 5.9.1

Functions

Hooks

Classes

Methods

 * function[wp_get_duotone_filter_id()](https://developer.wordpress.org/reference/functions/wp_get_duotone_filter_id/)
 * Returns the prefixed id for the duotone filter for use as a CSS id.
 * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_get_duotone_filter_id/#used-by)
   | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_get_duotone_filter_id/#uses)
   | Source: [wp-includes/deprecated.php:5166](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/deprecated.php#L5166-L5169)
 * function[wp_get_duotone_filter_svg()](https://developer.wordpress.org/reference/functions/wp_get_duotone_filter_svg/)
 * Returns the duotone filter SVG string for the preset.
 * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_get_duotone_filter_svg/#used-by)
   | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_get_duotone_filter_svg/#uses)
   | Source: [wp-includes/deprecated.php:5199](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/deprecated.php#L5199-L5202)
 * function[wp_get_global_styles_svg_filters()](https://developer.wordpress.org/reference/functions/wp_get_global_styles_svg_filters/)
 * Returns a string containing the SVGs to be referenced as filters (duotone).
 * Used by [1 function](https://developer.wordpress.org/reference/functions/wp_get_global_styles_svg_filters/#used-by)
   | Uses [6 functions](https://developer.wordpress.org/reference/functions/wp_get_global_styles_svg_filters/#uses)
   | Source: [wp-includes/deprecated.php:5246](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/deprecated.php#L5246-L5278)
 * function[wp_enqueue_block_support_styles()](https://developer.wordpress.org/reference/functions/wp_enqueue_block_support_styles/)
 * Hooks inline styles in the proper place, depending on the active theme.
 * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_enqueue_block_support_styles/#used-by)
   | Uses [3 functions](https://developer.wordpress.org/reference/functions/wp_enqueue_block_support_styles/#uses)
   | Source: [wp-includes/script-loader.php:3267](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/script-loader.php#L3267-L3282)
 * function[wp_global_styles_render_svg_filters()](https://developer.wordpress.org/reference/functions/wp_global_styles_render_svg_filters/)
 * Renders the SVG filters supplied by theme.json.
 * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_global_styles_render_svg_filters/#used-by)
   | Uses [4 functions](https://developer.wordpress.org/reference/functions/wp_global_styles_render_svg_filters/#uses)
   | Source: [wp-includes/deprecated.php:5291](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/deprecated.php#L5291-L5309)
 * method[WP_Theme_JSON::get_svg_filters()](https://developer.wordpress.org/reference/classes/wp_theme_json/get_svg_filters/)
 * Converts all filter (duotone) presets into SVGs.
 * Used by [0 functions](https://developer.wordpress.org/reference/classes/wp_theme_json/get_svg_filters/#used-by)
   | Uses [2 functions](https://developer.wordpress.org/reference/classes/wp_theme_json/get_svg_filters/#uses)
   | Source: [wp-includes/class-wp-theme-json.php:3510](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/class-wp-theme-json.php#L3510-L3534)