ecshop怎么做SEO优化，ecshop修改符合SEO优化

$sql = "INSERT INTO ".$ecs->table('brand')."(brand_name, site_url, brand_desc, brand_logo, is_show, sort_order) "."VALUES ('$_POST[brand_name]', '$site_url', '$_POST[brand_desc]', '$img_name', '$is_show', '$_POST[sort_order]')";
$db->query($sql);

$sql = "INSERT INTO ".$ecs->table('brand')."(brand_name, site_url, brand_desc, brand_title, brand_keywords, brand_description,brand_logo, is_show, sort_order) "."VALUES ('$_POST[brand_name]', '$site_url', '$_POST[brand_desc]', '$_POST[brand_title]', '$_POST[brand_keywords]', '$_POST[brand_description]', '$img_name', '$is_show', '$_POST[sort_order]')";
$db->query($sql);

admin_priv('brand_manage');
$sql = "SELECT brand_id, brand_name, site_url, brand_logo, brand_desc, brand_logo, is_show, sort_order "."FROM " .$ecs->table('brand'). " WHERE brand_id='$_REQUEST[id]'";
$brand = $db->GetRow($sql);

admin_priv('brand_manage');
$sql = "SELECT brand_id, brand_name, site_url, brand_logo, brand_desc,brand_title, brand_keywords, brand_description,brand_logo, is_show, sort_order "."FROM " .$ecs->table('brand'). " WHERE brand_id='$_REQUEST[id]'";
$brand = $db->GetRow($sql);

$img_name = basename($image->upload_image($_FILES['brand_logo'],'brandlogo'));
$param = "brand_name = '$_POST[brand_name]', site_url='$site_url', brand_desc='$_POST[brand_desc]', is_show='$is_show', sort_order='$_POST[sort_order]' ";

$img_name = basename($image->upload_image($_FILES['brand_logo'],'brandlogo'));
$param = "brand_name = '$_POST[brand_name]', site_url='$site_url', brand_desc='$_POST[brand_desc]',brand_title='$_POST[brand_title]', brand_keywords='$_POST[brand_keywords]', brand_description='$_POST[brand_description]',is_show='$is_show', sort_order='$_POST[sort_order]' ";

<tr>
<td class="label">页面标题</td>
<td><input type="text" name="brand_title" maxlength="120" value="{$brand.brand_title|escape}" /></td>
</tr>
<tr>
<td class="label">页面关键词</td>
<td><input type="text" name="brand_keywords" maxlength="120" value="{$brand.brand_keywords|escape}" /></td>
</tr>
<tr>
<td class="label">页面描述</td>
<td><textarea name="brand_description" cols="60" rows="4" >{$brand.brand_description}</textarea></td>
</tr>

$smarty->assign('keywords', htmlspecialchars($brand_info['brand_desc']));
$smarty->assign('description', htmlspecialchars($brand_info['brand_desc']));

$smarty->assign('page_title', htmlspecialchars($brand_info['brand_title']));
$smarty->assign('keywords', htmlspecialchars($brand_info['brand_keywords']));
$smarty->assign('description', htmlspecialchars($brand_info['brand_description']));

$page_title = $GLOBALS['_CFG']['shop_title'] . ' - ' . 'Powered by ECShop';

$page_title = $GLOBALS['_CFG']['shop_name'];

if ($filename == 'index')
$page_title=$GLOBALS['_CFG']['shop_title'] . '_' . $page_title;

ecs_header("HTTP/1.0 404 Not Found"); $smarty->display('404_error.html');