setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// Ensure tables exist
$db->exec("CREATE TABLE IF NOT EXISTS names (id INT AUTO_INCREMENT PRIMARY KEY, CardID VARCHAR(12) NOT NULL UNIQUE, name VARCHAR(100) DEFAULT NULL)");
$db->exec("CREATE TABLE IF NOT EXISTS times (UID VARCHAR(12) NOT NULL, temp FLOAT, timestamp DATETIME)");
// --- BACKUP FUNCTION ---
if (isset($_POST['backup'])) {
header('Content-Type: text/csv');
header('Content-Disposition: attachment; filename="backup_' . date('Y-m-d') . '.csv"');
$out = fopen('php://output', 'w');
// Example: Exporting names
$res = $db->query("SELECT * FROM names");
while ($row = $res->fetch(PDO::FETCH_ASSOC)) { fputcsv($out, $row); }
fclose($out);
exit;
}
// --- IMPORT FUNCTION ---
if (isset($_POST['import']) && isset($_FILES['csv_file'])) {
$handle = fopen($_FILES['csv_file']['tmp_name'], 'r');
while (($data = fgetcsv($handle)) !== false) {
if (count($data) >= 2) {
// Using INSERT IGNORE to prevent duplicate errors
$stmt = $db->prepare("INSERT IGNORE INTO names (CardID, name) VALUES (?, ?)");
$stmt->execute([$data[0], $data[1]]);
}
}
fclose($handle);
echo "Import completed successfully.
";
}
?>