Download files from remote FTP server via PHP, as found on http://chosencollective.com/technology/download-files-recursively-with-php

recursive_ftp_download.php

<?php
# Linear connection info for connecting to FTP

# set up basic connection
$ftp_server = "ftp.yourserver.com";
$ftp_user    = "Username";
$ftp_pass     = "Password";
 
$ftp_conn   = ftp_connect($ftp_server);
$ftp_login   = ftp_login($ftp_conn, $ftp_user, $ftp_pass);
 
ftp_pasv($ftp_conn, true);
 
# check connection
if ((!$ftp_conn) || (!$ftp_login)) {
	echo "FTP connection has failed!";
	echo "Attempted to connect to $ftp_server for user $ftp_user";
} else {
	echo "Connected to $ftp_server, for user $ftp_user";
}
 
echo "Currently in ".ftp_pwd($ftp_conn);
 
if (ftp_chdir($ftp_conn, "IDX_Version_5")) {
	echo "Current directory is now: " . ftp_pwd($ftp_conn) . "\n";
} else {
    echo "Couldn't change directory\n";
}
 
# Dump the data to the screen
var_dump(ftp_rawlist($ftp_conn, '.'));
 
# For the actual ftp actions, I use a FTP class I wrote which you can grab below
FTP::download(APPPATH.'data/idx', '.', $ftp_conn);
 
ftp_close($ftp_conn);
?>
 
<?php
# FTP Class for performing file downloads
class FTP {
 
   /**
     * Download() performs an automatic syncing of files and folders from a remote location
     * preserving folder and file names and structure
     *
     * @param	$local_dir: The directory to put the files, must be in app path and be writeable
     * @param 	$remote_dir: The directory to start traversing from. Use "." for root dir
     *
     * @return 	null
     */
    public static function download($local_dir, $remote_dir, $ftp_conn)
    {
 
	    if ($remote_dir != ".") {
	        if (ftp_chdir($ftp_conn, $remote_dir) == false) {
	            echo ("Change Dir Failed: $dir<br />\r\n");
	            return;
	        }
	        if (!(is_dir($dir)))
	            mkdir($dir);
	        chdir ($dir);
	    }
 
	    $contents = ftp_nlist($ftp_conn, ".");
	    foreach ($contents as $file) {
 
	        if ($file == '.' || $file == '..')
	            continue;
 
	        if (@ftp_chdir($ftp_conn, $file)) {
	            ftp_chdir ($ftp_conn, "..");
	            FTP::download($local_dir, $file, $ftp_conn);
	        }
	        else
	            ftp_get($ftp_conn, "$local_dir/$file", $file, FTP_BINARY);
	    }
 
	    ftp_chdir ($ftp_conn, "..");
	    chdir ("..");
	}
 
}
?>

"$dir" it is allways undefined