Title: MessagePartTypeEnum
Published: May 20, 2026

---

# class MessagePartTypeEnum {}

## In this article

 * [Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-messages-enums-messageparttypeenum/?output_format=md#source)
 * [Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-messages-enums-messageparttypeenum/?output_format=md#changelog)

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Enum for message part types.

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-messages-enums-messageparttypeenum/?output_format=md#source)󠁿

    ```php
    class MessagePartTypeEnum extends AbstractEnum
    {
        /**
         * Text content.
         */
        public const TEXT = 'text';
        /**
         * File content (inline or remote).
         */
        public const FILE = 'file';
        /**
         * Function call request.
         */
        public const FUNCTION_CALL = 'function_call';
        /**
         * Function response.
         */
        public const FUNCTION_RESPONSE = 'function_response';
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/php-ai-client/src/messages/enums/messageparttypeenum.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/php-ai-client/src/Messages/Enums/MessagePartTypeEnum.php#L21)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/php-ai-client/src/Messages/Enums/MessagePartTypeEnum.php#L21-L39)

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-messages-enums-messageparttypeenum/?output_format=md#changelog)󠁿

| Version | Description | 
| [0.1.0](https://developer.wordpress.org/reference/since/0.1.0/) | Introduced. |

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