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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 |
|---|---|
| 12 | /** WordPress Administration Widgets API */ |
| 13 | require_once(ABSPATH . 'wp-admin/includes/widgets.php'); |
| 14 | |
| 15 | if ( ! current_user_can('switch_themes') ) |
| 16 | wp_die( __( 'Cheatin’ uh?' )); |
| 17 | |
| 18 | wp_enqueue_script('admin-widgets'); |
| 19 | wp_admin_css( 'widgets' ); |
| 20 | |
| 21 | do_action( 'sidebar_admin_setup' ); |
| 22 | |
| 23 | $title = __( 'Widgets' ); |
| 24 | $parent_file = 'themes.php'; |
| 25 | |
| 26 | // register the inactive_widgets area as sidebar |
| 27 | register_sidebar(array( |
| 28 | 'name' => __('Inactive Widgets'), |
| 29 | 'id' => 'wp_inactive_widgets', |
| 30 | 'before_widget' => '', |