How to generate random number which never repeats itself

You can create a random number which will never repeat itself.
echo $randomNumber =  md5(date('Ymd'));

How to upload files on another FTP in PHP

First of all make the connection with ftp host and then login to ftp with username and password.
then If you are logged in the put the files on the ftp with ftp_put function.

$connection = ftp_connect(FTP_HOST );
$login = ftp_login( $connection, FTP_USERNAME, FTP_PASSWORD);
if ($connection AND $login ) {

ftp_put($connection, "REMOTE_FTP", "LOCAL_FILE_PATH", FTP_BINARY);
ftp_close($connection);
}

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