$name = $submission->get_posted_data(first-name);

$name = $cf7->posted_data["first-name"];

function log_cf7($WPCF7_ContactForm) {
   $submission = WPCF7_Submission::get_instance();
   $data = $submission->get_posted_data();
   $data2 = print_r($data, true);
   $name = $submission->get_posted_data(first-name);

   $myfile = fopen($_SERVER['DOCUMENT_ROOT'] . "/tempFile.txt","wb");

   $remote_file = "/ftp_msa_website/"."newDataFile.txt";
   fwrite($myfile, $data2);
   $ftp_server="x";
   $ftp_username="x";
   $ftp_userpass="x";
   $ftp_conn = ftp_connect($ftp_server) or die("Could not connect to server");
   $login = ftp_login($ftp_conn, $ftp_username, $ftp_userpass);
   if(ftp_put($ftp_conn,$remote_file,$_SERVER['DOCUMENT_ROOT'] . "/tempFile.txt",FTP_ASCII))
    {
        print("yay");
    }
    else
    {
        print("f...");
    }
    fclose($myfile);

    ftp_close($conn_id);
    print($name);
    exit("Thank you for submitting.");
}