如何使用PHP与又拍云API实现实时数据同步和备份的功能

<?php
// 设置授权信息
$bucket = "your_bucket_name";  // 设置空间名称
$operator = "your_operator_name";  // 设置操作员名称
$password = "your_password";  // 设置操作员密码
$api_key = "your_api_key";  // 设置API密钥

// 设置本地和远程文件夹路径
$local_path = "/path/to/local/folder";  // 设置本地文件夹路径
$remote_path = "/path/to/remote/folder";  // 设置远程文件夹路径

// 上传文件
function upload_file($local_file, $remote_file) {
    global $bucket, $operator, $password, $api_key;
    
    // 设置请求URL
    $url = "http://v0.api.upyun.com/{$bucket}{$remote_file}";
    
    // 设置请求头部
    $headers = array(
        "Authorization: Basic " . base64_encode("{$operator}:{$password}"),
    );
    
    // 执行上传操作
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_PUT, true);
    curl_setopt($ch, CURLOPT_INFILE, fopen($local_file, 'r'));
    curl_setopt($ch, CURLOPT_INFILESIZE, filesize($local_file));
    curl_exec($ch);
    curl_close($ch);
}

// 下载文件
function download_file($remote_file, $local_file) {
    global $bucket, $operator, $password, $api_key;
    
    // 设置请求URL
    $url = "http://v0.api.upyun.com/{$bucket}{$remote_file}";
    
    // 设置请求头部
    $headers = array(
        "Authorization: Basic " . base64_encode("{$operator}:{$password}"),
    );
    
    // 执行下载操作
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $data = curl_exec($ch);
    curl_close($ch);
    
    // 写入本地文件
    file_put_contents($local_file, $data);
}

// 遍历本地文件夹，上传文件到又拍云
$handle = opendir($local_path);
while ($file = readdir($handle)) {
    if ($file != "." && $file != "..") {
        $local_file = $local_path . '/' . $file;
        $remote_file = $remote_path . '/' . $file;
        upload_file($local_file, $remote_file);
    }
}
closedir($handle);

// 遍历远程文件夹，下载文件到本地
$handle = opendir($remote_path);
while ($file = readdir($handle)) {
    if ($file != "." && $file != "..") {
        $remote_file = $remote_path . '/' . $file;
        $local_file = $local_path . '/' . $file;
        download_file($remote_file, $local_file);
    }
}
closedir($handle);