Question

Edit: this describes my problem exactly, but I can’t overcome it with PHP: http://kb.winzip.com/kb/entry/149

I am writing an automated backup script in PHP which makes a backup copy of my website’s files and database, and sends these files to a remote FTP site for disaster recovery. My SQL and ZIP files (no pun intended on the My SQL) are generated perfectly on the server, however, my ZIP archive becomes corrupt when it is uploaded to the FTP site.

I downloaded the ZIP file from the server which generated it, and opened it no problem. But no ZIP extraction program seems to be able to open the same file once it is transferred to the FTP site and downloaded from there. I can open my SQL file no problem.

I’m pretty sure the archive is OK, but rather, the fault lies in the transferring of the file:

$conn_id = ftp_connect("ftp.example.com");
$login_result = ftp_login($conn_id, "johnny1", "Re@l1y $tr0nG P@5swOrd!");
$dbBackup = fopen('database-backup.sql', 'r');
$filesBackup = fopen('files-backup.zip', 'r');

if (ftp_fput($conn_id, 'database/backup.sql', $dbBackup, FTP_BINARY) && 
    ftp_fput($conn_id, 'files/backup.zip', $filesBackup, FTP_BINARY)) {
  echo "Done!<br>";
} else {
   echo "Failed";
   exit;
}

ftp_close($conn_id);
fclose($dbBackup);
fclose($filesBackup);

Is there anything wrong with the transfer of the ZIP file that you can see from here?

Thank you for your time.

Answer 1

I’ve tested your code on my Ubuntu system and it worked without problems.
This is probably an FTP server problem; you should try to upload the file on another FTP server.