php - Getting ftp_put progress

Question

I have a php script on a web server that uploads a file to another remote server via ftp_put.

How can I display the current upload progress to the user?

The only similar system I've seen is for file uploads from the user, with ajax requests to check the local size of the uploaded file on the server.

The equivalent system would be ajax requests to the web server, that then checked file sizes on the remote server and returned that data to the user's clientscript.

This seems horribly inefficient to me. Is there a better way?

Answer 1

It can be implemented easily using FTP URL protocol wrappers:

$url = "ftp://username:password@ftp.example.com/remote/dest/path/file.zip";
$local_path = "/local/source/path/file.zip";

$size = filesize($local_path) or die("Cannot retrieve size file");

$hout = fopen($url, "wb") or die("Cannot open destination file");
$hin = fopen($local_path, "rb") or die("Cannot open source file");

while (!feof($hin))
{
    $buf = fread($hin, 10240);
    fwrite($hout, $buf);
    echo "
".intval(ftell($hin)/$size*100)."%";
}

echo "
";

fclose($hin);
fclose($hout);