This hook is fired by the header.php script, which is loaded by a call to head() while it is populating the <head> tag for the admin theme. Functions attaching to this hook can directly output HTML into the <head>, or use functions like queue_css() and queue_js().
Plugins will likely not need to add content to the admin-side `<head>` for every page, but the passed request object can be used to include content on particular pages only.
Arguments
- Zend_Controller_Request_Http
$request
Example(s)
The following example adds an external javascript file to only the items/edit page.
add_plugin_hook('admin_theme_header', 'my_plugin_admin_theme_header'); function my_plugin_admin_theme_header($request) { if ($request->getController() == 'items' && $request->getAction() == 'edit') { queue_js('my-script'); } }

