PHP遍历文件并同步上传到服务器

<?php
function traverse($dir) {
    $files = scandir($dir);    
    $destinationDirectory = str_replace("/原网站路径/", '/新网站路径/',$dir.'/');
    //输出目标路径，方便排错
    echo "$destinationDirectory\n";
    foreach ($files as $file) {
        if ($file == '.' || $file == '..') {
            continue;
        }
        $path = $dir . '/' . $file;
        if (is_dir($path)) {
            traverse($path);
        } else {
          if (strpos($file, ".webp")) {
            echo "$path\n";//原文件路径
            echo "$destinationDirectory"."$file \n";//新文件路径
            echo "\n";
            fileUpload($path,$destinationDirectory.$file);
          }
        }
    }
}
/**
*@$local_file 本地文件路径
*@$remote_file 远程文件路径
*/
function fileUpload($local_file,$remote_file){
  
  $ftp_server = "example.com"; // FTP服务器地址
  $ftp_username = "username"; // FTP登录用户名
  $ftp_password = "password"; // FTP登录密码
   
  // 建立基础连接
  $conn_id = ftp_connect($ftp_server) or die("Couldn't connect to $ftp_server\n");
   
  // 使用提供的用户名和密码登录
  if (@ftp_login($conn_id, $ftp_username, $ftp_password)) {
      ftp_pasv($conn_id, true);//如果不加此句，会导致ftp_put出现错误
      // 上传文件
      if (ftp_put($conn_id, $remote_file, $local_file, FTP_ASCII)) {
          echo "Successfully uploaded $local_file to $remote_file\n";
      } else {
          echo "There was a problem while uploading $local_file\n";
      }
  } else {
      echo "Couldn't connect as $ftp_username\n";
  }
   
  // 关闭连接
  ftp_close($conn_id);

}

$dir = "/www/mysite/images";//在traverse方法中的路径替换可以将 /www/mysite/ 替换为目标路径，比如替换为：/www/newsite/
traverse($dir);