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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 |
|---|---|
| 232 | * in a theme. |
| 233 | * |
| 234 | * @since 4.4.0 |
| 235 | * |
| 236 | * @see WP_Customize_Manager::__construct() |
| 237 | * |
| 238 | * @param array $components List of core components to load. |
| 239 | * @param WP_Customize_Manager $this WP_Customize_Manager instance. |
| 240 | */ |
| 241 | $components = apply_filters( 'customize_loaded_components', array( 'widgets', 'nav_menus' ), $this ); |
| 242 | |
| 243 | if ( in_array( 'widgets', $components ) ) { |
| 244 | require_once( ABSPATH . WPINC . '/class-wp-customize-widgets.php' ); |
| 245 | $this->widgets = new WP_Customize_Widgets( $this ); |
| 246 | } |
| 247 | if ( in_array( 'nav_menus', $components ) ) { |
| 248 | require_once( ABSPATH . WPINC . '/class-wp-customize-nav-menus.php' ); |
| 249 | $this->nav_menus = new WP_Customize_Nav_Menus( $this ); |
| 250 | } |