file_put_contents 是最简单的解决方案:

The file_put_contents is the easiest solution:

file_put_contents('ftp://username:pa‌​ssword@hostname/path/to/file', $contents);

如果它不起作用，可能是因为您没有启用 URL 包装器PHP.

If it does not work, it's probably because you do not have URL wrappers enabled in PHP.

如果您需要更好地控制写入(传输模式、被动模式、偏移量、读取限制等)，请使用 ftp_fput 带有 php://temp(或 php://memory)流:

If you need greater control over the writing (transfer mode, passive mode, offset, reading limit, etc), use the ftp_fput with a handle to the php://temp (or the php://memory) stream:

$conn_id = ftp_connect('hostname');

ftp_login($conn_id, 'username', 'password');
ftp_pasv($conn_id, true);

$h = fopen('php://temp', 'r+');
fwrite($h, $contents);
rewind($h);

ftp_fput($conn_id, '/path/to/file', $h, FTP_BINARY, 0);

fclose($h);
ftp_close($conn_id);

(添加错误处理)

或者您可以直接在 FTP 服务器上打开/创建文件.如果文件很大，这特别有用，因为您不会将全部内容保存在内存中.

Or you can open/create the file directly on the FTP server. That's particularly useful, if the file is large, as you won't have keep whole contents in memory.

请参阅使用 PHP 在外部 FTP 服务器上生成 CSV 文件.