Title: WP_Customize_Nav_Menus::ajax_load_available_items
Published: August 18, 2015
Last modified: August 20, 2026

---

# WP_Customize_Nav_Menus::ajax_load_available_items(): never

## In this article

 * [Return](https://developer.wordpress.org/reference/classes/wp_customize_nav_menus/ajax_load_available_items/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wp_customize_nav_menus/ajax_load_available_items/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wp_customize_nav_menus/ajax_load_available_items/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_customize_nav_menus/ajax_load_available_items/?output_format=md#changelog)

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

Ajax handler for loading available menu items.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wp_customize_nav_menus/ajax_load_available_items/?output_format=md#return)󠁿

 never

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

    ```php
    public function ajax_load_available_items() {
    	check_ajax_referer( 'customize-menus', 'customize-menus-nonce' );

    	if ( ! current_user_can( 'edit_theme_options' ) ) {
    		wp_die( -1 );
    	}

    	$all_items  = array();
    	$item_types = array();
    	if ( isset( $_POST['item_types'] ) && is_array( $_POST['item_types'] ) ) {
    		$item_types = wp_unslash( $_POST['item_types'] );
    	} elseif ( isset( $_POST['type'] ) && isset( $_POST['object'] ) ) { // Back compat.
    		$item_types[] = array(
    			'type'   => wp_unslash( $_POST['type'] ),
    			'object' => wp_unslash( $_POST['object'] ),
    			'page'   => empty( $_POST['page'] ) ? 0 : absint( $_POST['page'] ),
    		);
    	} else {
    		wp_send_json_error( 'nav_menus_missing_type_or_object_parameter' );
    	}

    	foreach ( $item_types as $item_type ) {
    		if ( empty( $item_type['type'] ) || empty( $item_type['object'] ) ) {
    			wp_send_json_error( 'nav_menus_missing_type_or_object_parameter' );
    		}
    		$type   = sanitize_key( $item_type['type'] );
    		$object = sanitize_key( $item_type['object'] );
    		$page   = empty( $item_type['page'] ) ? 0 : absint( $item_type['page'] );
    		$items  = $this->load_available_items_query( $type, $object, $page );
    		if ( is_wp_error( $items ) ) {
    			wp_send_json_error( $items->get_error_code() );
    		}
    		$all_items[ $item_type['type'] . ':' . $item_type['object'] ] = $items;
    	}

    	wp_send_json_success( array( 'items' => $all_items ) );
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/class-wp-customize-nav-menus.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.1/src/wp-includes/class-wp-customize-nav-menus.php#L94)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.1/src/wp-includes/class-wp-customize-nav-menus.php#L94-L130)

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

| Uses | Description | 
| [WP_Customize_Nav_Menus::load_available_items_query()](https://developer.wordpress.org/reference/classes/wp_customize_nav_menus/load_available_items_query/)`wp-includes/class-wp-customize-nav-menus.php` |

Performs the post_type and taxonomy queries for loading available menu items.

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

Returns whether the current user has the specified capability.

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

Removes slashes from a string or recursively removes slashes from strings within an array.

  | 
| [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.

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

Converts a value to non-negative integer.

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

Sends a JSON response back to an Ajax request, indicating failure.

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

Sends a JSON response back to an Ajax request, indicating success.

  | 
| [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.

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

Checks whether the given variable is a WordPress Error.

  |

[Show 8 more](https://developer.wordpress.org/reference/classes/wp_customize_nav_menus/ajax_load_available_items/?output_format=md#)
[Show less](https://developer.wordpress.org/reference/classes/wp_customize_nav_menus/ajax_load_available_items/?output_format=md#)

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

| Version | Description | 
| [4.3.0](https://developer.wordpress.org/reference/since/4.3.0/) | Introduced. |

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