Title: WP_Upgrader::__construct
Published: April 25, 2014
Last modified: April 28, 2025

---

# WP_Upgrader::__construct( WP_Upgrader_Skin $skin = null )

## In this article

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

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

Construct the upgrader with a skin.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wp_upgrader/__construct/?output_format=md#parameters)󠁿

 `$skin`[WP_Upgrader_Skin](https://developer.wordpress.org/reference/classes/wp_upgrader_skin/)
optional

The upgrader skin to use. Default is a [WP_Upgrader_Skin](https://developer.wordpress.org/reference/classes/wp_upgrader_skin/)
instance.

Default:`null`

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wp_upgrader/__construct/?output_format=md#source)󠁿

    ```php
    public function __construct( $skin = null ) {
    	if ( null === $skin ) {
    		$this->skin = new WP_Upgrader_Skin();
    	} else {
    		$this->skin = $skin;
    	}
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-admin/includes/class-wp-upgrader.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-admin/includes/class-wp-upgrader.php#L143)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/class-wp-upgrader.php#L143-L149)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/wp_upgrader/__construct/?output_format=md#related)󠁿

| Uses | Description | 
| [WP_Upgrader_Skin::__construct()](https://developer.wordpress.org/reference/classes/wp_upgrader_skin/__construct/)`wp-admin/includes/class-wp-upgrader-skin.php` |

Constructor.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wp_upgrader/__construct/?output_format=md#changelog)󠁿

| Version | Description | 
| [2.8.0](https://developer.wordpress.org/reference/since/2.8.0/) | Introduced. |

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