ZenCart的伪静态插件将产品名也一起放在了url里，当你改变产品名称的时候就会导致重复页面的出现，因此就需要做301跳转。将多个指向同一个产品的url定向到标准的地址上。代码如下：
//产品页入口判断跳转by caic
$pos = strrpos($_SERVER['REQUEST_URI'],'-p-');
if($pos!==false){
$products_id = intval(substr($_SERVER['REQUEST_URI'],$pos+3));
$sql = "select p.products_id, pd.products_name,p.master_categories_id
from " . TABLE_PRODUCTS . " p, " .
TABLE_PRODUCTS_DESCRIPTION . " pd
where p.products_status = '1'
and p.products_id = '" . $products_id . "'
and pd.products_id = p.products_id
and pd.language_id = '" . (int)$_SESSION['languages_id'] . "'";
$res = $db->Execute($sql);
$prourl = zen_href_link(zen_get_info_page($res->fields["products_id"]), 'cPath=' . zen_get_generated_category_path_rev($res->fields["master_categories_id"]) . '&products_id=' . $res->fields["products_id"]);
$thisurl = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
if($thisurl!=$prourl){
Header("HTTP/1.1 301 Moved Permanently");
Header("Location: $prourl");
exit;
}
}