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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.
| Line | Code |
|---|---|
| 366 | if ( is_callable($output_callback) && ( !isset($wp_registered_widgets[$id]) || did_action( 'widgets_init' ) ) ) { |
| 367 | |
| 368 | /** |
| 369 | * Fires once for each registered widget. |
| 370 | * |
| 371 | * @since 3.0.0 |
| 372 | * |
| 373 | * @param array $widget An array of default widget arguments. |
| 374 | */ |
| 375 | do_action( 'wp_register_sidebar_widget', $widget ); |
| 376 | $wp_registered_widgets[$id] = $widget; |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | /** |
| 381 | * Retrieve description for widget. |
| 382 | * |
| 383 | * When registering widgets, the options can also include 'description' that |
| 384 | * describes the widget for display on the widget administration panel or |