Title: WP_User::for_site
Published: November 20, 2017
Last modified: August 20, 2026

---

# WP_User::for_site( int $site_id )

## In this article

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

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

Sets the site to operate on. Defaults to the current site.

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

 `$site_id`intrequired

Site ID to initialize user capabilities for. Default is the current site.

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

    ```php
    public function for_site( $site_id = 0 ) {
    	global $wpdb;

    	if ( ! empty( $site_id ) ) {
    		$this->site_id = absint( $site_id );
    	} else {
    		$this->site_id = get_current_blog_id();
    	}

    	$this->cap_key = $wpdb->get_blog_prefix( $this->site_id ) . 'capabilities';

    	$this->caps = $this->get_caps_data();

    	$this->get_role_caps();
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/class-wp-user.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.1/src/wp-includes/class-wp-user.php#L873)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-user.php#L873-L887)

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

| Uses | Description | 
| [WP_User::get_caps_data()](https://developer.wordpress.org/reference/classes/wp_user/get_caps_data/)`wp-includes/class-wp-user.php` |

Gets the available user capabilities data.

  | 
| [WP_User::get_role_caps()](https://developer.wordpress.org/reference/classes/wp_user/get_role_caps/)`wp-includes/class-wp-user.php` |

Retrieves all of the capabilities of the user’s roles, and merges them with individual user capabilities.

  | 
| [wpdb::get_blog_prefix()](https://developer.wordpress.org/reference/classes/wpdb/get_blog_prefix/)`wp-includes/class-wpdb.php` |

Gets blog prefix.

  | 
| [get_current_blog_id()](https://developer.wordpress.org/reference/functions/get_current_blog_id/)`wp-includes/load.php` |

Retrieves the current site ID.

  | 
| [absint()](https://developer.wordpress.org/reference/functions/absint/)`wp-includes/load.php` |

Converts a value to non-negative integer.

  |

[Show 2 more](https://developer.wordpress.org/reference/classes/wp_user/for_site/?output_format=md#)
[Show less](https://developer.wordpress.org/reference/classes/wp_user/for_site/?output_format=md#)

| Used by | Description | 
| [WP_User::for_blog()](https://developer.wordpress.org/reference/classes/wp_user/for_blog/)`wp-includes/class-wp-user.php` |

Sets the site to operate on. Defaults to the current site.

  | 
| [WP_User::init()](https://developer.wordpress.org/reference/classes/wp_user/init/)`wp-includes/class-wp-user.php` |

Sets up object properties, including capabilities.

  |

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

| Version | Description | 
| [4.9.0](https://developer.wordpress.org/reference/since/4.9.0/) | Introduced. |

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