PHP命令怎么实现文件备份_PHP文件备份与压缩归档操作

$source = 'data.txt';          // 要备份的文件
$backupDir = 'backup/';        // 备份目录
$backupFile = $backupDir . date('Ymd_His') . '_' . basename($source);
// 创建备份目录（如果不存在）
if (!is_dir($backupDir)) {
mkdir($backupDir, 0755, true);
}
// 执行备份（复制文件）
if (copy($source, $backupFile)) {
echo "备份成功：$backupFile";
} else {
echo "备份失败";
}

function createZipArchive($files, $zipName) {
    $zip = new ZipArchive();
    if ($zip->open($zipName, ZipArchive::CREATE | ZipArchive::OVERWRITE) !== TRUE) {
        return false;
    }
foreach ($files as $file) {
    if (file_exists($file)) {
        $zip->addFile($file, basename($file)); // 第二个参数是压缩包内的路径名
    }
}

$zip->close();
return file_exists($zipName);
}
// 示例：备份三个配置文件
$filesToBackup = ['config.php', 'data.json', 'readme.md'];
$archiveName = 'backup_' . date('Ymd') . '.zip';
if (createZipArchive($filesToBackup, $archiveName)) {
echo "压缩包创建成功：$archiveName";
} else {
echo "压缩失败";
}

function addFolderToZip($dir, $zip) {
    $files = new RecursiveIteratorIterator(
        new RecursiveDirectoryIterator($dir),
        RecursiveIteratorIterator::LEAVES_ONLY
    );
foreach ($files as $file) {
    if (!$file->isDir()) {
        $filePath = $file->getRealPath();
        $relativePath = substr($filePath, strlen($dir) + 1);
        $zip->addFile($filePath, $relativePath);
    }
}
}
// 使用示例
$zip = new ZipArchive();
$zipFile = 'project_backup.zip';
if ($zip->open($zipFile, ZipArchive::CREATE) === TRUE) {
addFolderToZip('project/', $zip);
$zip->close();
echo "目录已打包：$zipFile";
}

function cleanupOldBackups($backupDir, $days = 7) {
    if (!is_dir($backupDir)) return;
$files = glob($backupDir . '*');
$now = time();

foreach ($files as $file) {
    if (is_file($file)) {
        if (($now - filemtime($file)) > ($days * 86400)) {
            unlink($file); // 删除超过7天的备份
        }
    }
}
}
// 调用清理函数
cleanupOldBackups('backup/', 7);