MyBB Community Forums

how to add the {$attachbox} to our new custom page?

i already add this to my new custom page

	if($mybb->settings['enableattachments'] != 0 && $forumpermissions['canpostattachments'] != 0)
	//{ // Get a listing of the current attachments, if there are any
		$attachcount = 0;
		if($mybb->input['action'] == "editdraft" || ($mybb->input['tid'] && $mybb->input['pid']))
		{
			$attachwhere = "pid='$pid'";
		}
		else
		{
			$attachwhere = "posthash='".$db->escape_string($posthash)."'";
		}
		$query = $db->simple_select("attachments", "*", $attachwhere);
		$attachments = '';
		while($attachment = $db->fetch_array($query))
		{
			$attachment['size'] = get_friendly_size($attachment['filesize']);
			$attachment['icon'] = get_attachment_icon(get_extension($attachment['filename']));
			$attachment['filename'] = htmlspecialchars_uni($attachment['filename']);

			if($mybb->settings['bbcodeinserter'] != 0 && $forum['allowmycode'] != 0 && (!$mybb->user['uid'] || $mybb->user['showcodebuttons'] != 0))
			{
				eval("\$postinsert = \"".$templates->get("post_attachments_attachment_postinsert")."\";");
			}

			eval("\$attach_rem_options = \"".$templates->get("post_attachments_attachment_remove")."\";");

			$attach_mod_options = '';
			if($attachment['visible'] != 1)
			{
				eval("\$attachments .= \"".$templates->get("post_attachments_attachment_unapproved")."\";");
			}
			else
			{
				eval("\$attachments .= \"".$templates->get("post_attachments_attachment")."\";");
			}
			$attachcount++;
		}
		$query = $db->simple_select("attachments", "SUM(filesize) AS ausage", "uid='".$mybb->user['uid']."'");
		$usage = $db->fetch_array($query);
		if($usage['ausage'] > ($mybb->usergroup['attachquota']*1024) && $mybb->usergroup['attachquota'] != 0)
		{
			$noshowattach = 1;
		}
		if($mybb->usergroup['attachquota'] == 0)
		{
			$friendlyquota = $lang->unlimited;
		}
		else
		{
			$friendlyquota = get_friendly_size($mybb->usergroup['attachquota']*1024);
		}
		$friendlyusage = get_friendly_size($usage['ausage']);
		$lang->attach_quota = $lang->sprintf($lang->attach_quota, $friendlyusage, $friendlyquota);
		if($mybb->settings['maxattachments'] == 0 || ($mybb->settings['maxattachments'] != 0 && $attachcount < $mybb->settings['maxattachments']) && !isset($noshowattach))
		{
			eval("\$attach_add_options = \"".$templates->get("post_attachments_add")."\";");
		}

		if(($mybb->usergroup['caneditattachments'] || $forumpermissions['caneditattachments']) && $attachcount > 0)
		{
			eval("\$attach_update_options = \"".$templates->get("post_attachments_update")."\";");
		}

		if($attach_add_options || $attach_update_options)
		{
			eval("\$newattach = \"".$templates->get("post_attachments_new")."\";");
		}
		eval("\$attachbox = \"".$templates->get("post_attachments")."\";");

		$bgcolor = alt_trow();
	}

but when i add an attachment to my new thread, it directly failed? can anyone help me?