Title: wp_ajax_closed_postboxes
Published: April 25, 2014
Last modified: May 20, 2026

---

# wp_ajax_closed_postboxes()

## In this article

 * [Source](https://developer.wordpress.org/reference/functions/wp_ajax_closed_postboxes/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/functions/wp_ajax_closed_postboxes/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/functions/wp_ajax_closed_postboxes/?output_format=md#changelog)

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

Handles closed post boxes via AJAX.

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

    ```php
    function wp_ajax_closed_postboxes() {
    	check_ajax_referer( 'closedpostboxes', 'closedpostboxesnonce' );
    	$closed = isset( $_POST['closed'] ) ? explode( ',', $_POST['closed'] ) : array();
    	$closed = array_filter( $closed );

    	$hidden = isset( $_POST['hidden'] ) ? explode( ',', $_POST['hidden'] ) : array();
    	$hidden = array_filter( $hidden );

    	$page = $_POST['page'] ?? '';

    	if ( sanitize_key( $page ) !== $page ) {
    		wp_die( 0 );
    	}

    	$user = wp_get_current_user();
    	if ( ! $user ) {
    		wp_die( -1 );
    	}

    	if ( is_array( $closed ) ) {
    		update_user_meta( $user->ID, "closedpostboxes_$page", $closed );
    	}

    	if ( is_array( $hidden ) ) {
    		// Postboxes that are always shown.
    		$hidden = array_diff( $hidden, array( 'submitdiv', 'linksubmitdiv', 'manage-menu', 'create-menu' ) );
    		update_user_meta( $user->ID, "metaboxhidden_$page", $hidden );
    	}

    	wp_die( 1 );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-admin/includes/ajax-actions.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-admin/includes/ajax-actions.php#L1803)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/ajax-actions.php#L1803-L1833)

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

| Uses | Description | 
| [wp_get_current_user()](https://developer.wordpress.org/reference/functions/wp_get_current_user/)`wp-includes/pluggable.php` |

Retrieves the current user object.

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

Updates user meta field based on user ID.

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

Sanitizes a string key.

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

Verifies the Ajax request to prevent processing requests external of the blog.

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

Kills WordPress execution and displays HTML page with an error message.

  |

[Show 3 more](https://developer.wordpress.org/reference/functions/wp_ajax_closed_postboxes/?output_format=md#)
[Show less](https://developer.wordpress.org/reference/functions/wp_ajax_closed_postboxes/?output_format=md#)

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

| Version | Description | 
| [3.1.0](https://developer.wordpress.org/reference/since/3.1.0/) | Introduced. |

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