IPB -> SMF old links handling

[octopus22]

old IPB has links like this:
index.php?showtopic=6971

and after convert SMF create links:
index.php/topic,6971.0.html
or
index.php?topic=9148.0

how can i handle old links?
if i want just to redirect from "showtopic=" to "topic="

thanks for advise

[Oldiesmann]

index.php

Find

Code Select Expand

elseif (empty($_REQUEST['action']))
{

Add after that

Code Select Expand

if(isset($_REQUEST['showtopic']))
{
$location = (!empty($modSettings['queryless_urls'])) ? '/topic,', $_REQUEST['showtopic'], '.0.html' : '?topic=', $_REQUEST['showtopic'], '.0';

header('HTTP/1.1 301 Moved Permanently');
header('Location: ', $scripturl . $location);
}

The 301 Moved Permanently header is to tell search engines that the old URL should be updated with the new URL.

[octopus22]

code works with '.' instead of ','

and no any result... http://osravers.com/index.php?showtopic=6471

[tempster]

anyone have any new tips on how to preserve (or redirect) old ipb urls after converting to smf to avoid disruption to search engine listings and rankings?