Message system

The message system allows users to register notices and errors to be displayed when a page is rendered.

To register an error or message, call one of the following functions:

error_register('This is an error message');
message_register('This is an informational notice');

To clear all errors (or messages) and display them as an html string, call the following functions:

$error_html = theme('errors');
$message_html = theme('messages');