This page calls the hashtag_process Framework Core PHP function to process a PHP String value as Hashtag Markup.   Hashtag Variable injection is not done until processing time.   The Hashtag Framework can be configured to disable PHP processing in Hashtag Markup.  

<?php

$hashtag = '<# print "This was printed by Hashtag at <#[system.time]#>"; #>';
hashtag_process($hashtag);

?>