Alias for fetch($filename, true); - sends the parsed content to the browser.
Example 3.9. parse()
<?php
// Initialize OPT here
$tpl -> assign('title', 'Page title');
$tpl -> assign('style', 'yellow.css');
$tpl -> assign('current_date', date('d.m.Y, H:i'));
$tpl -> parse('overall_header.tpl');
?>