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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 |
|---|---|
| 804 | function wp_unregister_sidebar_widget($id) { |
| 805 | |
| 806 | /** |
| 807 | * Fires just before a widget is removed from a sidebar. |
| 808 | * |
| 809 | * @since 3.0.0 |
| 810 | * |
| 811 | * @param int $id The widget ID. |
| 812 | */ |
| 813 | do_action( 'wp_unregister_sidebar_widget', $id ); |
| 814 | |
| 815 | wp_register_sidebar_widget($id, '', ''); |
| 816 | wp_unregister_widget_control($id); |
| 817 | } |
| 818 | |
| 819 | /** |
| 820 | * Registers widget control callback for customizing options. |
| 821 | * |
| 822 | * The options contains the 'height', 'width', and 'id_base' keys. The 'height' |