Title: ResponseException::fromMissingData
Published: May 20, 2026

---

# ResponseException::fromMissingData( string $apiName, string $fieldName ): self

## In this article

 * [Parameters](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-responseexception/frommissingdata/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-responseexception/frommissingdata/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-responseexception/frommissingdata/?output_format=md#source)
 * [Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-responseexception/frommissingdata/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-responseexception/frommissingdata/?output_format=md#wp--skip-link--target)

Creates a ResponseException for missing expected data.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-responseexception/frommissingdata/?output_format=md#parameters)󠁿

 `$apiName`stringrequired

The name of the API/provider.

`$fieldName`stringrequired

The field that was expected but missing.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-responseexception/frommissingdata/?output_format=md#return)󠁿

 self

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-responseexception/frommissingdata/?output_format=md#source)󠁿

    ```php
    public static function fromMissingData(string $apiName, string $fieldName): self
    {
        $message = sprintf('Unexpected %s API response: Missing the "%s" key.', $apiName, $fieldName);
        return new self($message);
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/php-ai-client/src/providers/http/exception/responseexception.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/php-ai-client/src/Providers/Http/Exception/ResponseException.php#L27)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/php-ai-client/src/Providers/Http/Exception/ResponseException.php#L27-L31)

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-responseexception/frommissingdata/?output_format=md#changelog)󠁿

| Version | Description | 
| [0.2.0](https://developer.wordpress.org/reference/since/0.2.0/) | Introduced. |

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