Title: wp_get_chromium_major_version
Published: August 20, 2026

---

# wp_get_chromium_major_version(): int|null

## In this article

 * [Description](https://developer.wordpress.org/reference/functions/wp_get_chromium_major_version/?output_format=md#description)
 * [Return](https://developer.wordpress.org/reference/functions/wp_get_chromium_major_version/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/functions/wp_get_chromium_major_version/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/functions/wp_get_chromium_major_version/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/functions/wp_get_chromium_major_version/?output_format=md#changelog)

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

Returns the major Chrome/Chromium version from the current request’s User-Agent.

## 󠀁[Description](https://developer.wordpress.org/reference/functions/wp_get_chromium_major_version/?output_format=md#description)󠁿

Matches all Chromium-based browsers (Chrome, Edge, Opera, Brave).

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

 int|null The major Chrome version, or null if not a Chromium browser.

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

    ```php
    function wp_get_chromium_major_version(): ?int {
    	if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) {
    		return null;
    	}
    	if ( preg_match( '#Chrome/(\d+)#', $_SERVER['HTTP_USER_AGENT'], $matches ) ) {
    		return (int) $matches[1];
    	}
    	return null;
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/media.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.1/src/wp-includes/media.php#L6623)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/media.php#L6623-L6631)

## 󠀁[Related](https://developer.wordpress.org/reference/functions/wp_get_chromium_major_version/?output_format=md#related)󠁿

| Used by | Description | 
| [wp_start_cross_origin_isolation_output_buffer()](https://developer.wordpress.org/reference/functions/wp_start_cross_origin_isolation_output_buffer/)`wp-includes/media.php` |

Sends the Document-Isolation-Policy header for cross-origin isolation.

  | 
| [wp_set_client_side_media_processing_flag()](https://developer.wordpress.org/reference/functions/wp_set_client_side_media_processing_flag/)`wp-includes/media.php` |

Sets a global JS variable to indicate that client-side media processing is enabled.

  |

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

| Version | Description | 
| [7.1.0](https://developer.wordpress.org/reference/since/7.1.0/) | Introduced. |

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