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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 |
|---|---|
| 3118 | * Determines if Widgets library should be loaded. |
| 3119 | * |
| 3120 | * Checks to make sure that the widgets library hasn't already been loaded. If |
| 3121 | * it hasn't, then it will load the widgets library and run an action hook. |
| 3122 | * |
| 3123 | * @since 2.2.0 |
| 3124 | * @uses add_action() Calls '_admin_menu' hook with 'wp_widgets_add_menu' value. |
| 3125 | */ |
| 3126 | function wp_maybe_load_widgets() { |
| 3127 | if ( ! apply_filters('load_default_widgets', true) ) |
| 3128 | return; |
| 3129 | require_once( ABSPATH . WPINC . '/default-widgets.php' ); |
| 3130 | add_action( '_admin_menu', 'wp_widgets_add_menu' ); |
| 3131 | } |
| 3132 | |
| 3133 | /** |
| 3134 | * Append the Widgets menu to the themes main menu. |
| 3135 | * |
| 3136 | * @since 2.2.0 |