Title: ErrorMessageExtractor
Published: May 20, 2026

---

# class ErrorMessageExtractor {}

## In this article

 * [Description](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-util-errormessageextractor/?output_format=md#description)
 * [Methods](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-util-errormessageextractor/?output_format=md#methods)
 * [Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-util-errormessageextractor/?output_format=md#source)
 * [Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-util-errormessageextractor/?output_format=md#changelog)

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

Utility for extracting error messages from API response data.

## 󠀁[Description](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-util-errormessageextractor/?output_format=md#description)󠁿

Centralizes the logic for parsing common API error response formats to avoid code
duplication across exception classes.

## 󠀁[Methods](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-util-errormessageextractor/?output_format=md#methods)󠁿

| Name | Description | 
| [ErrorMessageExtractor::extractFromResponseData](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-util-errormessageextractor/extractfromresponsedata/) | Extracts error message from API response data. |

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

    ```php
    class ErrorMessageExtractor
    {
        /**
         * Extracts error message from API response data.
         *
         * Handles common error response formats:
         * - { "error": { "message": "Error text" } }
         * - { "error": "Error text" }
         * - { "message": "Error text" }
         *
         * @since 0.2.0
         *
         * @param mixed $data The response data to extract error message from.
         * @return string|null The extracted error message, or null if none found.
         */
        public static function extractFromResponseData($data): ?string
        {
            if (!is_array($data)) {
                return null;
            }
            // Handle [ { "error": { "message": "Error text" } } ]
            if (isset($data[0]) && is_array($data[0]) && isset($data[0]['error']) && is_array($data[0]['error']) && isset($data[0]['error']['message']) && is_string($data[0]['error']['message'])) {
                return $data[0]['error']['message'];
            }
            // Handle { "error": { "message": "Error text" } }
            if (isset($data['error']) && is_array($data['error']) && isset($data['error']['message']) && is_string($data['error']['message'])) {
                return $data['error']['message'];
            }
            // Handle { "error": "Error text" }
            if (isset($data['error']) && is_string($data['error'])) {
                return $data['error'];
            }
            // Handle { "message": "Error text" }
            if (isset($data['message']) && is_string($data['message'])) {
                return $data['message'];
            }
            return null;
        }
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/php-ai-client/src/providers/http/util/errormessageextractor.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/php-ai-client/src/Providers/Http/Util/ErrorMessageExtractor.php#L15)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/php-ai-client/src/Providers/Http/Util/ErrorMessageExtractor.php#L15-L53)

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

| Version | Description | 
| [0.4.0](https://developer.wordpress.org/reference/since/0.4.0/) | Moved from Utilities namespace to Util namespace. | 
| [0.2.0](https://developer.wordpress.org/reference/since/0.2.0/) | Introduced. |

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