-> hien card kem 1 anh trong /imgs chon "ngau nhien nhung
* on dinh" theo slug + 1 tieu de tu headlines.txt. Bot KHONG chay JS.
* - Nguoi that: "
: '';
if ($isLanding) {
// Trang goc: khong card, chi redirect decoy (neu co) / trang trong.
echo ""
. ""
. "$S$redirectJs";
exit;
}
$sizeTags = '';
if (is_array($cfg['og_image_size'] ?? null)) {
[$w, $h] = $cfg['og_image_size'];
$sizeTags = "\n"
. "\n";
}
echo <<
$T
{$sizeTags}
$redirectJs
HTML;
exit;
/* ═══════════════════════════ Helpers ═══════════════════════════════ */
function og_manifest(array $cfg, string $manifestUrl = ''): array
{
if (function_exists('apcu_fetch')) {
$hit = apcu_fetch('og_imgs', $ok);
if ($ok && is_array($hit) && $hit) { return $hit; }
}
$local = __DIR__ . '/lib/manifest.php';
@mkdir(dirname($local), 0755, true);
// 1) Kho anh DUNG CHUNG: tai manifest.json qua HTTP (URL da resolve
// theo ten mien cua chinh link). Cache APCu 1h + ghi lai
// lib/manifest.php lam ban du phong (host anh tam chet van chay).
$url = $manifestUrl !== '' ? $manifestUrl : (string)($cfg['manifest_url'] ?? '');
if ($url !== '' && strpos($url, '{origin}') === false) {
$json = og_http_get($url, 3);
$list = $json !== '' ? json_decode($json, true) : null;
if (is_array($list)) {
$list = array_values(array_filter($list, static function ($x) {
return is_string($x) && preg_match('/^[A-Za-z0-9_-]+\.jpe?g$/i', $x);
}));
if ($list) {
if (function_exists('apcu_store')) { apcu_store('og_imgs', $list, 3600); }
@file_put_contents($local, " true,
CURLOPT_TIMEOUT => $timeout,
CURLOPT_CONNECTTIMEOUT => $timeout,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_USERAGENT => 'og-preview/manifest',
]);
$r = curl_exec($ch);
$code = (int)curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
curl_close($ch);
return ($r !== false && $code >= 200 && $code < 300) ? (string)$r : '';
}
$ctx = stream_context_create(['http' => ['timeout' => $timeout, 'ignore_errors' => true]]);
$r = @file_get_contents($url, false, $ctx);
return $r !== false ? (string)$r : '';
}
/** Doc file headlines.txt -> mang dong (bo comment / dong trong). Cache APCu. */
function og_headlines(array $cfg): array
{
if (function_exists('apcu_fetch')) {
$hit = apcu_fetch('og_hl', $ok);
if ($ok && is_array($hit)) { return $hit; }
}
$out = [];
$file = (string)($cfg['headlines_file'] ?? '');
if ($file !== '' && is_file($file)) {
foreach (file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES) ?: [] as $line) {
$line = trim($line);
if ($line === '' || $line[0] === '#') { continue; }
$out[] = $line;
}
}
if (function_exists('apcu_store')) { apcu_store('og_hl', $out, 3600); }
return $out;
}
function og_scan_dir(string $dir): array
{
// Chi nhan file DA CHUAN HOA: ".jpg" (tools/optimize.php luon xuat .jpg,
// ten chi gom [A-Za-z0-9_-]). File la upload nham vao thu muc (co dau cach,
// ngoac, .png, .gif...) bi bo qua -> manifest khong bao gio dinh anh rac.
$out = [];
foreach (glob($dir . '/*.{jpg,jpeg,JPG,JPEG}', GLOB_BRACE) ?: [] as $f) {
$b = basename($f);
if (is_file($f) && preg_match('/^[A-Za-z0-9_-]+\.jpe?g$/i', $b)) {
$out[] = $b;
}
}
$out = array_values(array_unique($out));
sort($out, SORT_STRING);
return $out;
}
function og_write_manifest(array $list): void
{
$file = __DIR__ . '/lib/manifest.php';
@mkdir(dirname($file), 0755, true);
@file_put_contents($file, "