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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 |
|---|---|
| 22 | $widgets_access = 'on' == $_GET['widgets-access'] ? 'on' : 'off'; |
| 23 | set_user_setting( 'widgets_access', $widgets_access ); |
| 24 | } |
| 25 | |
| 26 | if ( 'on' == $widgets_access ) |
| 27 | add_filter( 'admin_body_class', create_function('', '{return " widgets_access ";}') ); |
| 28 | else |
| 29 | wp_enqueue_script('admin-widgets'); |
| 30 | |
| 31 | do_action( 'sidebar_admin_setup' ); |
| 32 | |
| 33 | $title = __( 'Widgets' ); |
| 34 | $parent_file = 'themes.php'; |
| 35 | |
| 36 | // register the inactive_widgets area as sidebar |
| 37 | register_sidebar(array( |
| 38 | 'name' => __('Inactive Widgets'), |
| 39 | 'id' => 'wp_inactive_widgets', |
| 40 | 'description' => '', |