Title: WP_AI_Client_HTTP_Client::prepare_headers
Published: May 20, 2026

---

# WP_AI_Client_HTTP_Client::prepare_headers( WordPressAiClientDependenciesPsrHttpMessageRequestInterface $request ): array<string,

## In this article

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

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

This function’s access is marked private. This means it is not intended for use 
by plugin or theme developers, only by core. It is listed here for completeness.

Prepares headers for WordPress HTTP API.

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

 `$request`WordPressAiClientDependenciesPsrHttpMessageRequestInterfacerequired

The PSR-7 request.

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

 array<string, string> Headers array for WordPress HTTP API.

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

    ```php
    private function prepare_headers( RequestInterface $request ): array {
    	$headers = array();

    	foreach ( $request->getHeaders() as $name => $values ) {
    		$headers[ (string) $name ] = implode( ', ', $values );
    	}

    	return $headers;
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/ai-client/adapters/class-wp-ai-client-http-client.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/ai-client/adapters/class-wp-ai-client-http-client.php#L161)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/ai-client/adapters/class-wp-ai-client-http-client.php#L161-L169)

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

| Used by | Description | 
| [WP_AI_Client_HTTP_Client::prepare_wp_args()](https://developer.wordpress.org/reference/classes/wp_ai_client_http_client/prepare_wp_args/)`wp-includes/ai-client/adapters/class-wp-ai-client-http-client.php` |

Prepares WordPress HTTP API arguments from a PSR-7 request.

  |

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

| Version | Description | 
| [7.0.0](https://developer.wordpress.org/reference/since/7.0.0/) | Introduced. |

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