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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 2 times in this file.
| Line | Code | 
|---|---|
| 337 |       * | 
| 338 |       * @since 3.9.0 | 
| 339 |       * @access public | 
| 340 |       */ | 
| 341 |      public function customize_controls_init() { | 
| 342 |           /** This action is documented in wp-admin/includes/ajax-actions.php */ | 
| 343 |           do_action( 'load-widgets.php' ); | 
| 344 |  | 
| 345 |           /** This action is documented in wp-admin/includes/ajax-actions.php */ | 
| 346 |           do_action( 'widgets.php' ); | 
| 347 |  | 
| 348 |           /** This action is documented in wp-admin/widgets.php */ | 
| 349 |           do_action( 'sidebar_admin_setup' ); | 
| 350 |      } | 
| 351 |  | 
| 352 |      /** | 
| 353 |       * Ensures widgets are available for all types of previews. | 
| 354 |       * | 
| 355 |       * When in preview, hook to {@see 'customize_register'} for settings after WordPress is loaded | 
| Line | Code | 
| 1490 |  | 
| 1491 |           if ( empty( $_POST['widget-id'] ) ) { | 
| 1492 |                wp_send_json_error( 'missing_widget-id' ); | 
| 1493 |           } | 
| 1494 |  | 
| 1495 |           /** This action is documented in wp-admin/includes/ajax-actions.php */ | 
| 1496 |           do_action( 'load-widgets.php' ); | 
| 1497 |  | 
| 1498 |           /** This action is documented in wp-admin/includes/ajax-actions.php */ | 
| 1499 |           do_action( 'widgets.php' ); | 
| 1500 |  | 
| 1501 |           /** This action is documented in wp-admin/widgets.php */ | 
| 1502 |           do_action( 'sidebar_admin_setup' ); | 
| 1503 |  | 
| 1504 |           $widget_id = $this->get_post_value( 'widget-id' ); | 
| 1505 |           $parsed_id = $this->parse_widget_id( $widget_id ); | 
| 1506 |           $id_base = $parsed_id['id_base']; | 
| 1507 |  | 
| 1508 |           $is_updating_widget_template = ( |