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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 |
|---|---|
| 406 | if ( is_callable( $output_callback ) && ( ! isset( $wp_registered_widgets[ $id ] ) || did_action( 'widgets_init' ) ) ) { |
| 407 | |
| 408 | /** |
| 409 | * Fires once for each registered widget. |
| 410 | * |
| 411 | * @since 3.0.0 |
| 412 | * |
| 413 | * @param array $widget An array of default widget arguments. |
| 414 | */ |
| 415 | do_action( 'wp_register_sidebar_widget', $widget ); |
| 416 | $wp_registered_widgets[ $id ] = $widget; |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | /** |
| 421 | * Retrieve description for widget. |
| 422 | * |
| 423 | * When registering widgets, the options can also include 'description' that |
| 424 | * describes the widget for display on the widget administration panel or |