Stuff

	$topic['body'] = str_replace(array('[php]', '[/php]','[pre]', '[/pre]'), '', un_htmlspecialchars($topic['body']));
	$topic['body'] = str_replace(array('<br />', '?&gt;'), array("\n", '?>'), $topic['body']);
	$topic['body'] = str_replace(array('&lt;php', '<php', '<&#063;php', '&lt;?php'), '<?php', $topic['body']);
	$topic['body'] = str_replace(array('&#91;'), array ('['), $topic['body']);