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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 |
|---|---|
| 495 | function wp_unregister_sidebar_widget( $id ) { |
| 496 | |
| 497 | /** |
| 498 | * Fires just before a widget is removed from a sidebar. |
| 499 | * |
| 500 | * @since 3.0.0 |
| 501 | * |
| 502 | * @param int|string $id The widget ID. |
| 503 | */ |
| 504 | do_action( 'wp_unregister_sidebar_widget', $id ); |
| 505 | |
| 506 | wp_register_sidebar_widget( $id, '', '' ); |
| 507 | wp_unregister_widget_control( $id ); |
| 508 | } |
| 509 | |
| 510 | /** |
| 511 | * Registers widget control callback for customizing options. |
| 512 | * |
| 513 | * @since 2.2.0 |