Title: WP_Style_Engine::is_valid_style_value
Published: November 2, 2022
Last modified: May 20, 2026

---

# WP_Style_Engine::is_valid_style_value( string $style_value ): bool

## In this article

 * [Parameters](https://developer.wordpress.org/reference/classes/wp_style_engine/is_valid_style_value/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/classes/wp_style_engine/is_valid_style_value/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wp_style_engine/is_valid_style_value/?output_format=md#source)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_style_engine/is_valid_style_value/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wp_style_engine/is_valid_style_value/?output_format=md#wp--skip-link--target)

Util: Checks whether an incoming block style value is valid.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wp_style_engine/is_valid_style_value/?output_format=md#parameters)󠁿

 `$style_value`stringrequired

A single CSS preset value.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wp_style_engine/is_valid_style_value/?output_format=md#return)󠁿

 bool

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wp_style_engine/is_valid_style_value/?output_format=md#source)󠁿

    ```php
    protected static function is_valid_style_value( $style_value ) {
    	return '0' === $style_value || ! empty( $style_value );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/style-engine/class-wp-style-engine.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/style-engine/class-wp-style-engine.php#L400)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/style-engine/class-wp-style-engine.php#L400-L402)

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wp_style_engine/is_valid_style_value/?output_format=md#changelog)󠁿

| Version | Description | 
| [6.1.0](https://developer.wordpress.org/reference/since/6.1.0/) | Introduced. |

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