index (cats + N shards)
* - /en/sitemap.xml?p=cats -> 17 EN category pages + EN homepage
* - /en/sitemap.xml?p=N -> Nth shard of EN listing detail URLs (50,000 / shard)
*
* Mirror of /var/www/tg4g/public/sitemap.php, points to /en/ URLs only.
*
* Deploy to: /var/www/tg4g/public/en/sitemap.php
*
* REMEMBER: also reference this from the root sitemap index so search engines
* pick it up. See nginx_en.txt / DEPLOY_en.txt for the patch.
*/
declare(strict_types=1);
$cfg = require '/var/www/tg4g/config.php';
$db = $cfg['database'];
$dsn = 'mysql:host=' . $db['host'] . ';port=' . ($db['port'] ?? 3306) . ';dbname=' . $db['database'] . ';charset=utf8mb4';
$pdo = new PDO($dsn, $db['username'], $db['password'], [
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
]);
const SITE = 'https://tg4g.com';
const PER = 50000;
const CATS = ['vps','dedicated','cdn','payment','proxy','domain','saas','ai','edu','dev','crypto','marketing','design','security','biz','comm','ec'];
header('Content-Type: application/xml; charset=utf-8');
header('Cache-Control: public, max-age=3600');
$part = $_GET['p'] ?? '';
function xe($s) { return htmlspecialchars((string)$s, ENT_QUOTES|ENT_XML1, 'UTF-8'); }
// hreflang block builder (always en + zh-CN pair)
function alt_block(string $zh_url, string $en_url): string {
return ''
. ''
. '';
}
// ============ 1. Index ============
if ($part === '') {
$total = (int)$pdo->query("SELECT COUNT(*) FROM listings WHERE is_active=1")->fetchColumn();
$shards = max(1, (int)ceil($total / PER));
$latest = $pdo->query("SELECT MAX(updated_at) FROM listings WHERE is_active=1")->fetchColumn() ?: date('c');
$lastmod = date('Y-m-d', strtotime($latest));
echo '' . "\n";
echo '' . "\n";
echo " " . SITE . "/en/sitemap.xml?p=cats$lastmod\n";
for ($i = 1; $i <= $shards; $i++) {
echo " " . SITE . "/en/sitemap.xml?p=$i$lastmod\n";
}
echo '';
exit;
}
// ============ 2. Cats + EN homepage ============
if ($part === 'cats') {
echo '' . "\n";
echo '' . "\n";
$today = date('Y-m-d');
// Homepage
echo " " . SITE . "/en/"
. alt_block(SITE . '/', SITE . '/en/')
. "$todaydaily1.0\n";
// Directory landing
echo " " . SITE . "/en/listings"
. alt_block(SITE . '/listings', SITE . '/en/listings')
. "$todaydaily0.9\n";
// 17 categories
foreach (CATS as $c) {
$en = SITE . "/en/listings?cat=$c";
$zh = SITE . "/listings?cat=$c";
echo " " . xe($en) . "" . alt_block($zh, $en) . "$todaydaily0.8\n";
}
// Hot sub_category pages (>= 5)
$sub_st = $pdo->query("SELECT category, sub_category, COUNT(*) AS n FROM listings WHERE is_active=1 AND sub_category IS NOT NULL AND sub_category<>'' GROUP BY category, sub_category HAVING n >= 5 ORDER BY category, n DESC");
foreach ($sub_st->fetchAll() as $row) {
$qs = http_build_query(['cat' => $row['category'], 'sub' => $row['sub_category']]);
$en = SITE . '/en/listings?' . $qs;
$zh = SITE . '/listings?' . $qs;
echo " " . xe($en) . "" . alt_block($zh, $en) . "$todayweekly0.6\n";
}
echo '';
exit;
}
// ============ 3. Detail shards ============
$shard = max(1, (int)$part);
$offset = ($shard - 1) * PER;
$st = $pdo->prepare("SELECT id, updated_at FROM listings WHERE is_active=1 ORDER BY id ASC LIMIT " . PER . " OFFSET $offset");
$st->execute();
$rows = $st->fetchAll();
if (!$rows) {
http_response_code(404);
echo '' . "\n";
exit;
}
echo '' . "\n";
echo '' . "\n";
foreach ($rows as $r) {
$lastmod = $r['updated_at'] ? date('Y-m-d', strtotime($r['updated_at'])) : date('Y-m-d');
$id = (int)$r['id'];
$en = SITE . "/en/listing/$id";
$zh = SITE . "/listing/$id";
echo " " . $en . ""
. alt_block($zh, $en)
. "$lastmodweekly0.5\n";
}
echo '';