PHP

FTP over Implicit TLS (Ssl, AuthSsl, AutoFix)

Demonstrates the SSL/TLS connection-mode properties Ssl, AuthSsl, and AutoFix. Setting Ssl true selects implicit FTPS, in which TLS begins immediately after the TCP connection on port 990.

Background: FTP has two ways to add TLS: implicit (this example) starts encrypted from the first byte on a dedicated port, 990; explicit (via AuthTls) connects in the clear on port 21 and issues AUTH TLS to upgrade. Explicit is the modern standard; implicit persists mainly for legacy servers. AuthSsl is an obsolete AUTH SSL variant to avoid. AutoFix, on by default, infers the mode from the port — disable it when you set these properties explicitly so it does not override your choice.

Chilkat PHP Downloads

Download Chilkat for PHP

Chilkat2 PHP

<?php

use Chilkat2\Ftp2;

$ftp = new Ftp2();

$ftp->Hostname = 'ftp.example.com';
$ftp->Username = 'myFtpLogin';

// Normally you would not hard-code the password in source.  You should instead obtain it
// from an interactive prompt, environment variable, or a secrets vault.
$ftp->Password = 'myPassword';

// Ssl = true selects IMPLICIT FTPS: TLS begins immediately after the TCP connection, before
// the greeting.  Port 990 is conventional for implicit FTPS.  Ssl takes priority over AuthTls
// and AuthSsl.
$ftp->Ssl = true;
$ftp->Port = 990;

// AuthSsl selects the legacy AUTH SSL command and is very uncommon -- use AuthTls (explicit
// FTPS) for modern servers instead.  Left false here.
$ftp->AuthSsl = false;

// AutoFix (default true) automatically adjusts Ssl/AuthTls/AuthSsl based solely on the Port
// (21 or 990).  Disable it when setting these properties explicitly, as here.
$ftp->AutoFix = false;

try {
    $ftp->Connect();
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo "Connected using implicit FTPS.\n";

try {
    $ftp->Disconnect();
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}