Title: File::__construct
Published: May 20, 2026

---

# File::__construct( string $file, string|null $mimeType = null )

## In this article

 * [Parameters](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/__construct/?output_format=md#parameters)
 * [Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/__construct/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/__construct/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/__construct/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/__construct/?output_format=md#wp--skip-link--target)

Constructor.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/__construct/?output_format=md#parameters)󠁿

 `$file`stringrequired

The file string (URL, base64 data, or local path).

`$mimeType`string|nulloptional

The MIME type of the file (optional).

Default:`null`

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/__construct/?output_format=md#source)󠁿

    ```php
    public function __construct(string $file, ?string $mimeType = null)
    {
        // Detect and process the file type (will set MIME type if possible)
        $this->detectAndProcessFile($file, $mimeType);
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/php-ai-client/src/files/dto/file.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/php-ai-client/src/Files/DTO/File.php#L59)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/php-ai-client/src/Files/DTO/File.php#L59-L63)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/__construct/?output_format=md#related)󠁿

| Uses | Description | 
| [File::detectAndProcessFile()](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/detectandprocessfile/)`wp-includes/php-ai-client/src/Files/DTO/File.php` |

Detects the file type and processes it accordingly.

  |

| Used by | Description | 
| [File::fromArray()](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/fromarray/)`wp-includes/php-ai-client/src/Files/DTO/File.php` |

{@inheritDoc}

  | 
| [PromptBuilder::withFile()](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-promptbuilder/withfile/)`wp-includes/php-ai-client/src/Builders/PromptBuilder.php` |

Adds a file to the current message.

  | 
| [MessageBuilder::withFile()](https://developer.wordpress.org/reference/classes/wordpress-aiclient-builders-messagebuilder/withfile/)`wp-includes/php-ai-client/src/Builders/MessageBuilder.php` |

Adds a file to the message.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-files-dto-file/__construct/?output_format=md#changelog)󠁿

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

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