Title: WP_Widget_Factory::_register_widgets
Published: April 25, 2014
Last modified: April 28, 2025

---

# WP_Widget_Factory::_register_widgets()

## In this article

 * [Source](https://developer.wordpress.org/reference/classes/wp_widget_factory/_register_widgets/?output_format=md#source)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_widget_factory/_register_widgets/?output_format=md#changelog)

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

Serves as a utility method for adding widgets to the registered widgets global.

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

    ```php
    public function _register_widgets() {
    	global $wp_registered_widgets;
    	$keys       = array_keys( $this->widgets );
    	$registered = array_keys( $wp_registered_widgets );
    	$registered = array_map( '_get_widget_id_base', $registered );

    	foreach ( $keys as $key ) {
    		// Don't register new widget if old widget with the same id is already registered.
    		if ( in_array( $this->widgets[ $key ]->id_base, $registered, true ) ) {
    			unset( $this->widgets[ $key ] );
    			continue;
    		}

    		$this->widgets[ $key ]->_register();
    	}
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/class-wp-widget-factory.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/class-wp-widget-factory.php#L90)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/class-wp-widget-factory.php#L90-L105)

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

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

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