FTP copy a file to another place in same FTP

The code below makes the FTP server to upload the file to itself (using loopback connection). It needs the FTP server to allow both passive and active connection mode.

If you want to understand the ftp commands here is a list of them : List of ftp commands

function copyFile($filePath, $newFilePath)
{
    $ftp1 = ftp_connect('192.168.1.1');
    $ftp2 = ftp_connect('192.168.1.1');
    ftp_raw($ftp1, "USER ftpUsername");
    ftp_raw($ftp1, "PASS mypassword");
    ftp_raw($ftp2, "USER ftpUsername");
    ftp_raw($ftp2, "PASS mypassword");

    $res = ftp_raw($ftp2, "PASV");
    $addressAndPort = substr($res[0], strpos($res[0], '(') + 1);
    $addressAndPort = substr($addressAndPort, 0, strpos($addressAndPort, ')'));

    ftp_raw($ftp1, "CWD ." . dirname($newFilePath));
    ftp_raw($ftp2, "CWD ." . dirname($filePath));
    ftp_raw($ftp1, "PORT ".$addressAndPort);

    ftp_raw($ftp1, "STOR " . basename($newFilePath));
    ftp_raw($ftp2, "RETR " . basename($filePath));

    ftp_raw($ftp1, "QUIT");
    ftp_raw($ftp2, "QUIT");
}

Here's another workaround using PHP cUrl to execute a copy request on the server by feeding parameters from the local machine and reporting the outcome:

Local code: In this simple test routine, I want to copy the leaning tower photo to the correct folder, Pisa:

$ch = curl_init();
$data = array ('pic' => 'leaningtower', 'folder' => 'Pisa');
curl_setopt($ch, CURLOPT_URL,"http://travelphotos.com/copypic.php");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch,  CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$result = curl_exec($ch);
curl_close($ch);
echo $result;

Server code (copypic.php): On the remote server, I have simple error checking. On this server I had to mess with the path designation, i.e., I had to use "./" for an acceptable path reference, so you may have to tinker with it a bit.

$pic = $_POST["pic"];
$folder = $_POST["folder"];
if (!$pic || !$folder) exit();

$sourcePath = "./unsortedpics/".$pic.".jpg";
$destPath =   "./sortedpics/".$folder."/".$pic.".jpg";

if (!file_exists($sourcePath )) exit("Source file not found");
if (!is_dir("./sortedpics/".$folder)) exit("Invalid destination folder");
if (!copy($sourcePath , $destPath)) exit("Copy not successful");
echo "File copied";