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

---

# WP_AI_Client_HTTP_Client::prepare_body( WordPressAiClientDependenciesPsrHttpMessageRequestInterface $request ): string|null

## In this article

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

[ Back to top](https://developer.wordpress.org/reference/classes/wp_ai_client_http_client/prepare_body/?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 request body for WordPress HTTP API.

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

 `$request`WordPressAiClientDependenciesPsrHttpMessageRequestInterfacerequired

The PSR-7 request.

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

 string|null The request body.

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

    ```php
    private function prepare_body( RequestInterface $request ): ?string {
    	$body = $request->getBody();

    	if ( $body->getSize() === 0 ) {
    		return null;
    	}

    	if ( $body->isSeekable() ) {
    		$body->rewind();
    	}

    	return (string) $body;
    }
    ```

[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#L179)
[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#L179-L191)

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

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

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