A simple helper class that enables cross-page wordpress admin notices. This is especially useful if you want to show a notice after saving some information, like when using the save_post hook.
The notices are stored using transients that expire as soon as they have been displayed.
Firstly, include or autoload the class file. Once that's done, you can trigger a notice like so:
$notices = new Iconic_Transient_Notices();
$notices->add_notice('error', __('Oops, some error message', 'textdomain');
The next time an admin page loads, your error will be displayed.
add_notice( $type, $message )
$typeThe error message type. Can be error, warning, or info.$messageYour error message.