' . "\n";
}
/**
* 输出 sitemapindex 子项
*/
function emit_sitemap_entry($loc, $lastmod = '')
{
echo "\n";
echo ' ' . xml_escape($loc) . "\n";
if ($lastmod !== '') {
echo ' ' . xml_escape($lastmod) . "\n";
}
echo "\n";
}
/**
* 输出 urlset 子项
*/
function emit_url_entry($loc, $lastmod = '')
{
echo "\n";
echo ' ' . xml_escape($loc) . "\n";
if ($lastmod !== '') {
echo ' ' . xml_escape($lastmod) . "\n";
}
echo "\n";
}
/**
* 获取所有语言（默认至少 en）
*/
function get_languages($langDir)
{
$langs = array();
if (is_dir($langDir)) {
$files = @scandir($langDir);
if (is_array($files)) {
foreach ($files as $fileName) {
if (substr(strtolower($fileName), -4) !== '.php') {
continue;
}
$langs[] = strtolower(substr($fileName, 0, -4));
}
}
}
$langs = array_values(array_unique($langs));
sort($langs);
if (empty($langs)) {
$langs[] = 'en';
}
return $langs;
}
/**
* 获取发行商目录列表
*/
function get_publishers($cateDir)
{
$publishers = array();
if (!is_dir($cateDir)) {
return $publishers;
}
$it = new DirectoryIterator($cateDir);
foreach ($it as $item) {
if ($item->isDot() || !$item->isDir()) {
continue;
}
$publishers[] = strtolower($item->getFilename());
}
$publishers = array_values(array_unique($publishers));
sort($publishers);
return $publishers;
}
/**
* 统计每个发行商下的 json 数量（带缓存）
*/
function get_publisher_json_counts($cateDir, array $publishers, $ttl = 21600)
{
$cacheFile = __DIR__ . '/img_cache/sitemap_product_counts.json';
$now = time();
if (is_file($cacheFile)) {
$raw = @file_get_contents($cacheFile);
$obj = $raw ? json_decode($raw, true) : null;
if (is_array($obj) && isset($obj['time']) && isset($obj['counts']) && is_array($obj['counts'])) {
$age = $now - (int)$obj['time'];
if ($age >= 0 && $age <= $ttl) {
return $obj['counts'];
}
}
}
$counts = array();
foreach ($publishers as $publisher) {
$count = 0;
$dir = $cateDir . '/' . $publisher;
if (is_dir($dir)) {
$files = @scandir($dir);
if (is_array($files)) {
foreach ($files as $fileName) {
if (substr(strtolower($fileName), -5) === '.json') {
$count++;
}
}
}
}
$counts[$publisher] = $count;
}
$payload = array('time' => $now, 'counts' => $counts);
@file_put_contents($cacheFile, json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES));
return $counts;
}
/**
* 输出根 sitemap（分层）
* 顺序：先分类 sitemap，再产品 sitemap 索引
*/
function output_root_sitemap($base)
{
emit_xml_header();
echo '' . "\n";
emit_sitemap_entry(full_url($base, '/sitemap-categories.xml'), gmdate('c'));
emit_sitemap_entry(full_url($base, '/sitemap-products.xml'), gmdate('c'));
echo "\n";
}
/**
* 输出分类 sitemap
* 分类 URL 采用 /{lang}/cate/{publisher}
*/
function output_categories_sitemap($base, array $langs, array $publishers, $cateDir)
{
$lang = in_array('en', $langs, true) ? 'en' : $langs[0];
emit_xml_header();
echo '' . "\n";
foreach ($publishers as $publisher) {
$dir = $cateDir . '/' . $publisher;
$mtime = @filemtime($dir);
$lastmod = $mtime ? gmdate('c', $mtime) : gmdate('c');
$loc = full_url($base, '/' . $lang . '/cate/' . rawurlencode($publisher));
emit_url_entry($loc, $lastmod);
}
echo "\n";
}
/**
* 输出产品 sitemap 索引（仅负责列出分页文件）
* 例如 /sitemap-products-1.xml、/sitemap-products-2.xml
*/
function output_products_index_sitemap($base, array $counts)
{
$totalProducts = 0;
foreach ($counts as $c) {
$totalProducts += (int)$c;
}
$pages = (int)ceil($totalProducts / SITEMAP_PRODUCT_PAGE_SIZE);
if ($pages < 1) {
$pages = 1;
}
emit_xml_header();
echo '' . "\n";
for ($i = 1; $i <= $pages; $i++) {
emit_sitemap_entry(full_url($base, '/sitemap-products-' . $i . '.xml'), gmdate('c'));
}
echo "\n";
}
/**
* 输出产品分页 sitemap（5000 条/页）
* URL 采用 /{lang}/{publisher}/{slug}.html
*/
function output_products_page_sitemap($base, array $langs, array $publishers, $cateDir, $page)
{
$lang = in_array('en', $langs, true) ? 'en' : $langs[0];
$offset = ($page - 1) * SITEMAP_PRODUCT_PAGE_SIZE;
$remain = SITEMAP_PRODUCT_PAGE_SIZE;
emit_xml_header();
echo '' . "\n";
foreach ($publishers as $publisher) {
if ($remain <= 0) {
break;
}
$dir = $cateDir . '/' . $publisher;
if (!is_dir($dir)) {
continue;
}
$files = @scandir($dir);
if (!is_array($files)) {
continue;
}
$jsonFiles = array();
foreach ($files as $fileName) {
if (substr(strtolower($fileName), -5) === '.json') {
$jsonFiles[] = $fileName;
}
}
$count = count($jsonFiles);
if ($count <= 0) {
continue;
}
if ($offset >= $count) {
$offset -= $count;
continue;
}
$slice = array_slice($jsonFiles, $offset, $remain);
foreach ($slice as $fileName) {
$slug = substr($fileName, 0, -5);
$loc = full_url(
$base,
'/' . $lang . '/' . rawurlencode($publisher) . '/' . rawurlencode($slug) . '.html'
);
$mtime = @filemtime($dir . '/' . $fileName);
$lastmod = $mtime ? gmdate('c', $mtime) : gmdate('c');
emit_url_entry($loc, $lastmod);
}
$remain -= count($slice);
$offset = 0;
}
echo "\n";
}
$base = get_base_url();
$path = get_request_path();
$cateDir = __DIR__ . '/cate';
$langDir = __DIR__ . '/lang';
$langs = get_languages($langDir);
$publishers = get_publishers($cateDir);
$counts = get_publisher_json_counts($cateDir, $publishers);
if ($path === '/sitemap.xml' || $path === '/sitemap.php') {
output_root_sitemap($base);
exit;
}
if ($path === '/sitemap-categories.xml') {
output_categories_sitemap($base, $langs, $publishers, $cateDir);
exit;
}
if ($path === '/sitemap-products.xml') {
output_products_index_sitemap($base, $counts);
exit;
}
if (preg_match('#^/sitemap-products-([0-9]+)\.xml$#', $path, $m)) {
$page = max(1, (int)$m[1]);
output_products_page_sitemap($base, $langs, $publishers, $cateDir, $page);
exit;
}
http_response_code(404);
header('Content-Type: text/plain; charset=UTF-8');
echo "sitemap route not found";