Title: PromptBuilder::__clone
Published: May 20, 2026

---

# PromptBuilder::__clone()

## In this article

 * [Description](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/__clone/?output_format=md#description)
 * [Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/__clone/?output_format=md#source)
 * [Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/__clone/?output_format=md#changelog)

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

Creates a deep clone of this builder.

## 󠀁[Description](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/__clone/?output_format=md#description)󠁿

Clones all mutable state including messages, model configuration, and request options.

Service objects (registry, model, event dispatcher) are intentionally NOT cloned
as they are shared dependencies.

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

    ```php
    public function __clone()
    {
        // Deep clone messages array (Message has __clone)
        $clonedMessages = [];
        foreach ($this->messages as $message) {
            $clonedMessages[] = clone $message;
        }
        $this->messages = $clonedMessages;
        // Clone model config (ModelConfig has __clone)
        $this->modelConfig = clone $this->modelConfig;
        // Clone request options if set (contains only primitives)
        if ($this->requestOptions !== null) {
            $this->requestOptions = clone $this->requestOptions;
        }
        // Note: $registry, $model, and $eventDispatcher are service objects
        // and are intentionally NOT cloned - they should be shared references.
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/php-ai-client/src/builders/promptbuilder.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/php-ai-client/src/Builders/PromptBuilder.php#L121)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/php-ai-client/src/Builders/PromptBuilder.php#L121-L137)

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

| Version | Description | 
| [0.4.2](https://developer.wordpress.org/reference/since/0.4.2/) | Introduced. |

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