<?php
class MyEventHandler
{
	static function handleMissingTranslation($event)
	{
		// event class for this event is CMissingTranslationEvent
		// so we can get some info about the message
		$text = implode("\n", array(
			'Language: '.$event->language,
			'Category:'.$event->category,
			'Message:'.$event->message
		));
		// sending email
		mail('admin@example.com', 'Missing translation', $text);
	}
}