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Edit File: class-wp-widget-factory.php
<?php /** * Widget API: WP_Widget_Factory class * * @package WordPress * @subpackage Widgets * @since 4.4.0 */ /** * Singleton that registers and instantiates WP_Widget classes. * * @since 2.8.0 * @since 4.4.0 Moved to its own file from wp-includes/widgets.php */ #[AllowDynamicProperties] class WP_Widget_Factory { /** * Widgets array. * * @since 2.8.0 * @var array */ public $widgets = array(); /** * PHP5 constructor. * * @since 4.3.0 */ public function __construct() { add_action( 'widgets_init', array( $this, '_register_widgets' ), 100 ); } /** * PHP4 constructor. * * @since 2.8.0 * @deprecated 4.3.0 Use __construct() instead. * * @see WP_Widget_Factory::__construct() */ public function WP_Widget_Factory() { _deprecated_constructor( 'WP_Widget_Factory', '4.3.0' ); self::__construct(); } /** * Registers a widget subclass. * * @since 2.8.0 * @since 4.6.0 Updated the `$widget` parameter to also accept a WP_Widget instance object * instead of simply a `WP_Widget` subclass name. * * @param string|WP_Widget $widget Either the name of a `WP_Widget` subclass or an instance of a `WP_Widget` subclass. */ public function register( $widget ) { if ( $widget instanceof WP_Widget ) { $this->widgets[ spl_object_id( $widget ) ] = $widget; } else { $this->widgets[ $widget ] = new $widget(); } } /** * Un-registers a widget subclass. * * @since 2.8.0 * @since 4.6.0 Updated the `$widget` parameter to also accept a WP_Widget instance object * instead of simply a `WP_Widget` subclass name. * * @param string|WP_Widget $widget Either the name of a `WP_Widget` subclass or an instance of a `WP_Widget` subclass. */ public function unregister( $widget ) { if ( $widget instanceof WP_Widget ) { unset( $this->widgets[ spl_object_id( $widget ) ] ); } else { unset( $this->widgets[ $widget ] ); } } /** * Serves as a utility method for adding widgets to the registered widgets global. * * @since 2.8.0 * * @global array $wp_registered_widgets */ 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(); } } /** * Returns the registered WP_Widget object for the given widget type. * * @since 5.8.0 * * @param string $id_base Widget type ID. * @return WP_Widget|null */ public function get_widget_object( $id_base ) { $key = $this->get_widget_key( $id_base ); if ( '' === $key ) { return null; } return $this->widgets[ $key ]; } /** * Returns the registered key for the given widget type. * * @since 5.8.0 * * @param string $id_base Widget type ID. * @return string */ public function get_widget_key( $id_base ) { foreach ( $this->widgets as $key => $widget_object ) { if ( $widget_object->id_base === $id_base ) { return $key; } } return ''; } }