(PHP ActiveX) FTP Connect, Examine Server Certificate, and then Authenticate

Demonstrates how to connect to an FTP server, examine the server's SSL/TLS certificate, and then, if it meets the application's security requirements, proceed to authenticate.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// This example assumes Chilkat Ftp2 to have been previously unlocked.
// See Unlock Ftp2 for sample code.

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Ftp2')
$ftp = new COM("Chilkat.Ftp2");

$ftp->Hostname = 'www.authtls-ftps-server.com';
$ftp->Username = 'FTP_LOGIN';
$ftp->Password = 'FTP_PASSWORD';
$ftp->AuthTls = 1;
$ftp->Port = 21;

// Connect to the FTP server using explicit TLS (AUTH TLS).
$success = $ftp->ConnectOnly();
if ($success != 1) {
    print $ftp->LastErrorText . "\n";
    exit;
}

// Get the FTP server's certificate.
// serverCert is a Chilkat.Cert
$serverCert = $ftp->GetSslServerCert();
if ($ftp->LastMethodSuccess != 1) {
    print $ftp->LastErrorText . "\n";
    exit;
}

// Now that we have the certificate, we can check it in any way we desire.
// (See the online reference documentation for the certificate object's methods
// and properties)...

// Assuming the certificate is OK, proceed to authenticate with the FTP server.
$success = $ftp->LoginAfterConnectOnly();
if ($success != 1) {
    print $ftp->LastErrorText . "\n";
    exit;
}

// 
// Proceed with uploading/download files, etc...
// 

$ftp->Disconnect();
print 'Success.' . "\n";

?>