PHP FTP -下载特定目录中的文件，而不是根目录

$ftp_server = "ftp.example.com";
$ftp_username = "username";
$ftp_password = "password";

$conn = ftp_connect($ftp_server);
ftp_login($conn, $ftp_username, $ftp_password);

$target_directory = "/path/to/directory";
ftp_chdir($conn, $target_directory);

$file_list = ftp_nlist($conn, ".");

$local_file = "local/path/example.txt";
$remote_file = "example.txt";
ftp_get($conn, $local_file, $remote_file, FTP_BINARY);

$ftp_server = "ftp.example.com";
$ftp_username = "username";
$ftp_password = "password";
$target_directory = "/path/to/directory";
$local_file = "local/path/example.txt";
$remote_file = "example.txt";

$conn = ftp_connect($ftp_server);
ftp_login($conn, $ftp_username, $ftp_password);
ftp_chdir($conn, $target_directory);
$file_list = ftp_nlist($conn, ".");
ftp_get($conn, $local_file, $remote_file, FTP_BINARY);

ftp_close($conn);