PHP ftp_put()上传FTPS文件失败：无法获取SSL会话求助

我用以下代码尝试通过FTPS向服务器上传文件：

$connectionId = ftp_ssl_connect($server, 21, 15);
if ($connectionId === false) {
  throw new Exception("Could not connect to server via FTPs.");
}
echo "Connected".PHP_EOL;
if (!ftp_login($connectionId, $username, $password)) {
  throw new Exception("Unable to authenticate with server.");
}
echo "Login".PHP_EOL;

if (!ftp_pasv($connectionId, true)) {
  throw new Exception("Could not turn on passive mode.");
}
echo "Passive".PHP_EOL;

$path = '.';
if (!ftp_chdir($connectionId, $path)) {
  throw new Exception("Could not change to directory ".$path.". Current directory :".ftp_pwd($connectionId));
}
echo "Chdir".PHP_EOL;

$filename = './test.txt';
if (!ftp_put($connectionId, basename($filename), $filename)) {
  throw new Exception("Could not upload file to server.");
}

执行流程一切正常，但调用ftp_put()时出现以下错误：

PHP Warning: ftp_put(): data_accept: failed to retrieve the existing SSL session in ...
PHP Warning: ftp_put(): Accepted data connection in...
PHP Fatal error: Uncaught Exception: Could not upload file to server.

但用PHP curl或者流包装器（fwrite）上传完全正常，证书没问题，服务器用的是TLS1.3，我试过不同上下文都没用。查看PHP源码发现，这个错误是因为PHP尝试使用的最后一个会话为NULL导致的。

请问这是ftp_put本身的问题吗？比如和隐式FTPS有关？有没有解决办法？

更新：发现服务器上已经创建了文件，但大小是0字节。

更新2：根据提示我试了这段代码：

$filename = './test.txt';
$filenameNew = './test_new.txt';
if (ftp_rename($connectionId, $filename, $filenameNew)) {
 echo "successfully renamed $filename to $filenameNew\n";
} else {
 echo "There was a problem while renaming $filename to $filenameNew\n";
 print_r( error_get_last() ); 
}

结果文件重命名成功，但出现警告：

successfully renamed ./test.txt to ./test_new.txt
PHP Warning: PHP Request Shutdown: SSL_read on shutdown: error:0A000126:SSL routines::unexpected eof while reading in Unknown on line 0

看起来可以通过让openssl忽略此EOF错误来禁用该警告，所以我觉得这个警告可以在我的场景中忽略。

内容的提问来源于stack exchange，提问作者4thfloorstudios