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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 | 
|---|---|
| 357 |       * | 
| 358 |       * @since 3.9.0 | 
| 359 |       * @access public | 
| 360 |       */ | 
| 361 |      public function customize_controls_init() { | 
| 362 |           /** This action is documented in wp-admin/includes/ajax-actions.php */ | 
| 363 |           do_action( 'load-widgets.php' ); | 
| 364 |  | 
| 365 |           /** This action is documented in wp-admin/includes/ajax-actions.php */ | 
| 366 |           do_action( 'widgets.php' ); | 
| 367 |  | 
| 368 |           /** This action is documented in wp-admin/widgets.php */ | 
| 369 |           do_action( 'sidebar_admin_setup' ); | 
| 370 |      } | 
| 371 |  | 
| 372 |      /** | 
| 373 |       * Ensure widgets are available for all types of previews. | 
| 374 |       * | 
| 375 |       * When in preview, hook to 'customize_register' for settings | 
| Line | Code | 
| 1385 |  | 
| 1386 |           if ( ! isset( $_POST['widget-id'] ) ) { | 
| 1387 |                wp_send_json_error(); | 
| 1388 |           } | 
| 1389 |  | 
| 1390 |           /** This action is documented in wp-admin/includes/ajax-actions.php */ | 
| 1391 |           do_action( 'load-widgets.php' ); | 
| 1392 |  | 
| 1393 |           /** This action is documented in wp-admin/includes/ajax-actions.php */ | 
| 1394 |           do_action( 'widgets.php' ); | 
| 1395 |  | 
| 1396 |           /** This action is documented in wp-admin/widgets.php */ | 
| 1397 |           do_action( 'sidebar_admin_setup' ); | 
| 1398 |  | 
| 1399 |           $widget_id = $this->get_post_value( 'widget-id' ); | 
| 1400 |           $parsed_id = $this->parse_widget_id( $widget_id ); | 
| 1401 |           $id_base   = $parsed_id['id_base']; | 
| 1402 |  | 
| 1403 |           if ( isset( $_POST['widget-' . $id_base] ) && is_array( $_POST['widget-' . $id_base] ) && preg_match( '/__i__|%i%/', key( $_POST['widget-' . $id_base] ) ) ) { |