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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.
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67 | * An array of arguments passed to wp_nav_menu() to retrieve a custom menu. |
68 | * |
69 | * @type callable|bool $fallback_cb Callback to fire if the menu doesn't exist. Default empty. |
70 | * @type mixed $menu Menu ID, slug, or name. |
71 | * } |
72 | * @param stdClass $nav_menu Nav menu object for the current menu. |
73 | * @param array $args Display arguments for the current widget. |
74 | * @param array $instance Array of settings for the current widget. |
75 | */ |
76 | wp_nav_menu( apply_filters( 'widget_nav_menu_args', $nav_menu_args, $nav_menu, $args, $instance ) ); |
77 |
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78 | echo $args['after_widget']; |
79 | } |
80 |
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81 | /** |
82 | * Handles updating settings for the current Custom Menu widget instance. |
83 | * |
84 | * @since 3.0.0 |
85 | * @access public |