// Which forums should not be searched? Author searches are also carried out in unindexed forums
	if (empty($keywords) && sizeof($author_id_ary))
	{
		$ex_fid_ary = array_keys($auth->acl_getf('!f_read', true));
	}
	else
	{
		$ex_fid_ary = array_unique(array_merge(array_keys($auth->acl_getf('!f_read', true)), array_keys($auth->acl_getf('!f_search', true))));
	}

	// find out in which forums the user is allowed to view approved posts
	if ($auth->acl_get('m_approve'))
	{
		$m_approve_fid_ary = array(-1);
		$m_approve_fid_sql = '';
	}
	else if ($auth->acl_getf_global('m_approve'))
	{
		$m_approve_fid_ary = array_diff(array_keys($auth->acl_getf('!m_approve', true)), $ex_fid_ary);
		$m_approve_fid_sql = ' AND (p.post_approved = 1' . ((sizeof($m_approve_fid_ary)) ? ' OR ' . $db->sql_in_set('p.forum_id', $m_approve_fid_ary, true) : '') . ')';
	}
	else
	{
		$m_approve_fid_ary = array();
		$m_approve_fid_sql = ' AND p.post_approved = 1';
	}