Title: WP_Translation_Controller::normalize_header
Published: April 3, 2024
Last modified: February 24, 2026

---

# WP_Translation_Controller::normalize_header( string $header ): string

## In this article

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

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

Normalizes header names to be capitalized.

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

 `$header`stringrequired

Header name.

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

 string Normalized header name.

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

    ```php
    protected function normalize_header( string $header ): string {
    	$parts = explode( '-', $header );
    	$parts = array_map( 'ucfirst', $parts );
    	return implode( '-', $parts );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/l10n/class-wp-translation-controller.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/l10n/class-wp-translation-controller.php#L354)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/l10n/class-wp-translation-controller.php#L354-L358)

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

| Used by | Description | 
| [WP_Translation_Controller::get_headers()](https://developer.wordpress.org/reference/classes/wp_translation_controller/get_headers/)`wp-includes/l10n/class-wp-translation-controller.php` |

Returns all existing headers for a given text domain.

  |

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

| Version | Description | 
| [6.5.0](https://developer.wordpress.org/reference/since/6.5.0/) | Introduced. |

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