php FTP Wrapper writes empty files (0 Byte), FTP Extension doesn't - php

Question

On a server with PHP 5.2.17 running, using any function which makes use of the built in ftp wrapper to upload a file, creates an empty file on the server:
file_put_contents() returns with the accurate number of bytes
copy() also returns with true
Both create the file, but it's empty.
When trying with ftp_put() from the FTP extension, both in binary and ascii mode, it works well.
On my workstation with PHP 5.3.10 it somehow works also with the wrapper.
In code:
$source = '/tmp/testfile';
$target = 'ftp://user:pass#example.com/testfile';
copy($source, $target);
gives no error or warning, but leaves an empty file on the server.
$source = '/tmp/testfile';
$target = 'testfile';
$ftp = ftp_connect('example.com');
ftp_login($ftp, 'user', 'pass');
ftp_put($ftp, $target, $source, FTP_ASCII);
ftp_close($ftp);
works in every respect.
thanks for any suggestion!

Answer 1

Have you tried SSH2 libs? Some sample implementation below:
public function uploadSFTP($host_name, $port, $user, $publicSshKeyPath, $privateSshKeyPath, $remoteFile, $localFile, $fileOperation = 'w')
{
$ssh_conn = ssh2_connect($host_name, $port);
if (ssh2_auth_pubkey_file($ssh_conn, $user, $publicSshKeyPath, $privateSshKeyPath))
{
$sftp_conn = ssh2_sftp($ssh_conn);
$inputfileStream = #fopen('ssh2.sftp://' . $sftp_conn . $remoteFile, $fileOperation);
try
{
if (!$inputfileStream)
throw new Exception('Could open remote file for writing: ' . $remoteFile);
$localFileContents = #file_get_contents($localFile);
if ($localFileContents === FALSE)
throw new Exception('Could not open local file for reading :' . $localFile);
if (#fwrite($inputfileStream, $localFileContents) === FALSE)
throw new Exception('Could not SFTP file');
}
catch (Exception $e)
{
// Do something...
}
fclose($sftpInfileStream);
}
}