first, in addons/seo/func.php
search for:
if (preg_match_all('/(\{\$index_script\}\?\{\$target_name\}=products(&|&)product_id=\{\$product.product_id\})([&|&]?)/i', $tpl_source, $matches)) {
foreach ($matches[0] as $key => $match) {
$tpl_source = str_replace($match, '{"p"|fn_seo_link:$product.product_id:$product.product}' . (empty($matches[3][$key]) ? '' : '?'), $tpl_source);
}
}
insert after:
if (preg_match_all('/(\{\$index_script\}\?\{\$target_name\}=products(&|&)product_id=\{\$previous.product_id\})([&|&]?)/i', $tpl_source, $matches)) {
foreach ($matches[0] as $key => $match) {
$tpl_source = str_replace($match, '{"p"|fn_seo_link:$previous.product_id:$previous.product}' . (empty($matches[3][$key]) ? '' : '?'), $tpl_source);
}
}
if (preg_match_all('/(\{\$index_script\}\?\{\$target_name\}=products(&|&)product_id=\{\$next.product_id\})([&|&]?)/i', $tpl_source, $matches)) {
foreach ($matches[0] as $key => $match) {
$tpl_source = str_replace($match, '{"p"|fn_seo_link:$next.product_id:$next.product}' . (empty($matches[3][$key]) ? '' : '?'), $tpl_source);
}
}
save and exit
next in includes/customer/products.php
search for:
if (!empty($product['meta_description']) || !empty($product['meta_keywords'])) {
insert before:
$next_id=0;
$prev_id=0;
$q = "select product_id from $db_tables[products_categories] where category_id=$product[main_category] and link_type='M'";
$test = db_get_hash_array($q,'product_id');
sort($test);
for ($i=0;$i
if ($test[$i]['product_id'] == $product_id) {
if ($i==0) $prev_id = $test[$last]['product_id'];
else $prev_id = $test[$i-1]['product_id'];
if ($i == $last) $next_id = $test[0]['product_id'];
else $next_id = $test[$i+1]['product_id'];
$i = $last;
}
}
$next = fn_get_product_data($next_id, $auth, $cart_language);
$previous = fn_get_product_data($prev_id, $auth, $cart_language);
$smarty->assign('next', $next);
$smarty->assign('previous', $previous);
save and exit
lastly, in skins//customer/products_pages/product_details.tpl
enter something like:
```php
|
{if ($previous.product_id!=0 && $previous.product_id!='')} « Previous {/if} |
{if ($next.product_id!=0 && $next.product_id!='')} Next » {/if} |
```
wherever you would like the prev/next links to appear (top, bottom, top and bottom, etc...)
save, exit and enjoy
note: if you used the version of the mod I posted in another thread, this is an updated version of that, and some code has changed so that it works with the SEO functionality of cscart's seo addon
It is springtime so they went on a picnic:D 
