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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 |
|---|---|
| 2743 | * Determines if Widgets library should be loaded. |
| 2744 | * |
| 2745 | * Checks to make sure that the widgets library hasn't already been loaded. If |
| 2746 | * it hasn't, then it will load the widgets library and run an action hook. |
| 2747 | * |
| 2748 | * @since 2.2.0 |
| 2749 | * @uses add_action() Calls '_admin_menu' hook with 'wp_widgets_add_menu' value. |
| 2750 | */ |
| 2751 | function wp_maybe_load_widgets() { |
| 2752 | if ( ! apply_filters('load_default_widgets', true) ) |
| 2753 | return; |
| 2754 | require_once( ABSPATH . WPINC . '/default-widgets.php' ); |
| 2755 | add_action( '_admin_menu', 'wp_widgets_add_menu' ); |
| 2756 | } |
| 2757 | |
| 2758 | /** |
| 2759 | * Append the Widgets menu to the themes main menu. |
| 2760 | * |
| 2761 | * @since 2.2.0 |