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<?php
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/**
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* Backup-Hilfsfunktion – wird von update.php, backup.php und den Cron-Jobs genutzt.
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*
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* Ein Backup ist eine ZIP-Datei mit
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* - allen Programm- und Datendateien (ohne Backups, Entwickler-Artefakte),
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* - einem konsistenten Datenbank-Abzug: database_backup.sqlite (SQLite, per VACUUM INTO) oder database_backup.sql (MySQL),
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* - backup_manifest.json (Zeitpunkt, Datenbanktyp, Programmversion, Anzahl Tabellen).
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* Wiederherstellen und Prüfen: includes/backup_restore.php.
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*/
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require_once __DIR__ . '/simple_zip.php';
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/** Pfade, die nie ins Backup gehören (Entwickler-Artefakte und Zwischenspeicher). */
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function backup_excluded_fragments(): array
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{
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return ['/node_modules/', '/.git/', '/desktop/dist/', '/mobile/build/', '/mobile/artifacts/', '/plugin-webseite/storage/', '/plugin-webseite/schluessel/'];
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}
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// ── Backup erstellen ───────────────────────────────────────────────�
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/**
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* @param string|null $rootDir Ordner, dessen Dateien gesichert werden (Standard: DeskHub-Hauptordner)
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* @param string|null $backupDir Zielordner (Standard: backups/ im Hauptordner)
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* @param PDO|null $pdo Datenbankverbindung (Standard: get_db())
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*/
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function create_backup(?string $rootDir = null, ?string $backupDir = null, ?PDO $pdo = null): array
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{
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$rootDir = realpath($rootDir ?? __DIR__ . '/..');
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$backupDir = $backupDir ?? $rootDir . '/backups';
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$pdo = $pdo ?? get_db();
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if (!is_dir($backupDir)) {
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mkdir($backupDir, 0755, true);
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}
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// .htaccess zum Schutz des Backup-Ordners
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$htaccess = $backupDir . '/.htaccess';
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if (!file_exists($htaccess)) {
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file_put_contents($htaccess, "Require all denied
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Order deny,allow
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Deny from all
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");
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}
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$backupName = 'backup_' . date('Y-m-d_H-i-s') . '.zip';
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$backupPath = $backupDir . '/' . $backupName;
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if (file_exists($backupPath)) { // zwei Backups in derselben Sekunde
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$backupName = 'backup_' . date('Y-m-d_H-i-s') . '_' . substr(bin2hex(random_bytes(2)), 0, 3) . '.zip';
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$backupPath = $backupDir . '/' . $backupName;
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}
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// Zeitlimit erhöhen für große Backups
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@set_time_limit(300);
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@ini_set('memory_limit', '256M');
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// php_zip automatisch aktivieren falls nicht geladen
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if (!class_exists('ZipArchive')) {
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$activated = false;
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// 1. Dynamisch laden (funktioniert wenn dl() erlaubt)
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if (function_exists('dl') && ini_get('enable_dl')) {
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$activated = @dl('php_zip.dll') || @dl('zip.so') || @dl('zip');
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}
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// 2. php.ini dauerhaft anpassen (für nächsten Start)
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if (!$activated) {
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$phpIni = php_ini_loaded_file();
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if ($phpIni && is_writable($phpIni)) {
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$ini = file_get_contents($phpIni);
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$patched = preg_replace('/^[ \t]*;[ \t]*(extension[ \t]*=[ \t]*(?:php_)?zip(?:\.dll|\.so)?)/mi', '$1', $ini);
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if ($patched !== $ini) {
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file_put_contents($phpIni, $patched);
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// Hinweis speichern dass Neustart nötig ist
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file_put_contents($backupDir . '/.restart_required', '1');
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}
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}
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}
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}
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// Datenbank-Abzug: SQLite-Datei wird NICHT als laufende Datei kopiert, sondern konsistent per VACUUM INTO gesichert
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$driver = $pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
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$liveDb = null;
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if ($driver === 'sqlite') {
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$row = $pdo->query('PRAGMA database_list')->fetch(PDO::FETCH_ASSOC);
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$liveDb = !empty($row['file']) ? realpath($row['file']) : null;
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}
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// Alle Dateien sammeln
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$exclude = [realpath($backupDir) ?: $backupDir];
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$iter = new RecursiveIteratorIterator(
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new RecursiveDirectoryIterator($rootDir, RecursiveDirectoryIterator::SKIP_DOTS),
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RecursiveIteratorIterator::SELF_FIRST
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);
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$files = [];
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foreach ($iter as $file) {
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if (!$file->isFile()) continue;
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$filePath = $file->getRealPath();
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$norm = str_replace('\\', '/', $filePath);
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$skip = false;
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foreach ($exclude as $ex) {
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if ($ex && strpos($filePath, $ex) === 0) { $skip = true; break; }
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}
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foreach (backup_excluded_fragments() as $frag) {
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if (str_contains($norm, $frag)) { $skip = true; break; }
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}
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if ($liveDb && ($filePath === $liveDb || $filePath === $liveDb . '-wal' || $filePath === $liveDb . '-shm' || $filePath === $liveDb . '-journal')) $skip = true;
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if ($skip) continue;
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$files[$filePath] = str_replace(chr(92), '/', substr($filePath, strlen($rootDir) + 1)); // im ZIP immer mit /
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}
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// Abzug erzeugen
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$sqlDump = null; // MySQL: Text
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$sqlFile = null; // MySQL: Dateiname im ZIP
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$sqliteSnapshot = null;
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$tableCount = 0;
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$dbError = null;
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if ($driver === 'sqlite') {
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$snapshot = tempnam(sys_get_temp_dir(), 'dhbk');
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@unlink($snapshot);
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try {
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$pdo->exec('VACUUM INTO ' . $pdo->quote($snapshot));
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$sqliteSnapshot = $snapshot;
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} catch (Throwable $e) {
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// Ältere SQLite-Version ohne VACUUM INTO: Datei kopieren (weniger sicher, aber besser als nichts)
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if ($liveDb && @copy($liveDb, $snapshot)) $sqliteSnapshot = $snapshot;
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else $dbError = 'SQLite-Abzug fehlgeschlagen: ' . $e->getMessage();
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}
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if ($sqliteSnapshot) {
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$tableCount = (int) $pdo->query("SELECT COUNT(*) FROM sqlite_master WHERE type = 'table' AND name NOT LIKE 'sqlite_%'")->fetchColumn();
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}
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} elseif ($driver === 'mysql') {
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try {
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$dbName = (string) $pdo->query('SELECT DATABASE()')->fetchColumn();
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$dump = "-- DeskHub MySQL Backup\n-- Erstellt: " . date('Y-m-d H:i:s') . "\n-- Datenbank: " . $dbName . "\n\nSET FOREIGN_KEY_CHECKS=0;\n\n";
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// Alle Tabellen auslesen
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$tables = $pdo->query("SHOW TABLES")->fetchAll(PDO::FETCH_COLUMN);
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$tableCount = count($tables);
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foreach ($tables as $table) {
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// CREATE TABLE
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$create = $pdo->query("SHOW CREATE TABLE `$table`")->fetch();
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$dump .= "\n-- Tabelle: $table\n";
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$dump .= "DROP TABLE IF EXISTS `$table`;\n";
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$dump .= $create['Create Table'] . ";\n\n";
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// Daten
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$rows = $pdo->query("SELECT * FROM `$table`")->fetchAll(PDO::FETCH_ASSOC);
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if ($rows) {
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$cols = '`' . implode('`, `', array_keys($rows[0])) . '`';
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$dump .= "INSERT INTO `$table` ($cols) VALUES\n";
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$vals = [];
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foreach ($rows as $row) {
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$escaped = array_map(fn($v) => $v === null ? 'NULL' : $pdo->quote((string)$v), $row);
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$vals[] = '(' . implode(', ', $escaped) . ')';
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}
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$dump .= implode(",\n", $vals) . ";\n\n";
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}
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}
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$dump .= "SET FOREIGN_KEY_CHECKS=1;\n";
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$sqlFile = 'database_backup.sql';
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$sqlDump = $dump;
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} catch (Throwable $e) {
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$dbError = 'MySQL-Abzug fehlgeschlagen: ' . $e->getMessage();
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}
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}
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// Ohne Datenbank-Abzug ist es kein brauchbares Backup: lieber Fehler melden als ein Backup vortäuschen
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if ($dbError !== null) {
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if ($sqliteSnapshot) @unlink($sqliteSnapshot);
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return ['ok' => false, 'error' => $dbError];
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}
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$manifest = json_encode([
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'created' => date('Y-m-d H:i:s'), 'driver' => $driver, 'version' => defined('DESKHUB_VERSION') ? DESKHUB_VERSION : null,
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'database' => $sqliteSnapshot ? 'database_backup.sqlite' : $sqlFile, 'tables' => $tableCount, 'files' => count($files),
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], JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
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// ZIP erstellen – ZipArchive wenn verfügbar, sonst eigene Implementierung
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try {
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if (class_exists('ZipArchive')) {
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$zip = new ZipArchive();
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if ($zip->open($backupPath, ZipArchive::CREATE | ZipArchive::OVERWRITE) !== true) {
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return ['ok' => false, 'error' => 'Backup-ZIP konnte nicht erstellt werden.'];
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}
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foreach ($files as $filePath => $relativePath) {
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$zip->addFile($filePath, $relativePath);
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}
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if ($sqlDump && $sqlFile) $zip->addFromString($sqlFile, $sqlDump);
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if ($sqliteSnapshot) $zip->addFile($sqliteSnapshot, 'database_backup.sqlite');
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$zip->addFromString('backup_manifest.json', $manifest);
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$zip->close();
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} else {
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// Eigene ZIP-Implementierung (kein php_zip nötig)
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$zip = new SimpleZip($backupPath);
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foreach ($files as $filePath => $relativePath) {
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$zip->addFile($filePath, $relativePath);
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}
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if ($sqlDump && $sqlFile) $zip->addFromString($sqlFile, $sqlDump);
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if ($sqliteSnapshot) $zip->addFromString('database_backup.sqlite', (string) file_get_contents($sqliteSnapshot));
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$zip->addFromString('backup_manifest.json', $manifest);
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$zip->close();
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}
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} catch (Exception $e) {
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if ($sqliteSnapshot) @unlink($sqliteSnapshot);
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return ['ok' => false, 'error' => 'Backup fehlgeschlagen: ' . $e->getMessage()];
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}
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if ($sqliteSnapshot) @unlink($sqliteSnapshot);
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if (!file_exists($backupPath)) {
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return ['ok' => false, 'error' => 'Backup-Datei wurde nicht erstellt.'];
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}
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return [
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'ok' => true,
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'filename' => $backupName,
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'path' => $backupPath,
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'files' => count($files),
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'size' => round(filesize($backupPath) / 1024 / 1024, 2),
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];
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}
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