(PHP Extension) HTTP - Verify Server is a Trusted Root CA

Demonstrates how to only allow connections to an HTTP server having a certificate with a root that is in our list of trusted CA root certificates.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
// by calling UnlockBundle.  It requires a Bundle unlock code.
$chilkatGlob = new CkGlobal();
$success = $chilkatGlob->UnlockBundle('Anything for 30-day trial.');
if ($success != true) {
    print $chilkatGlob->lastErrorText() . "\n";
    exit;
}

//  On my particular system, the root CA cert for this URL is not pre-installed.
//  Note: This may be different for you.
//  Also, this example was written on 29-May-2015.  This URL was valid at the time,
//  but may not be valid at a future date.
$url = 'https://animals.nationalgeographic.com/animals/invertebrates/starfish/';

$http = new CkHttp();

//  Require that the SSL/TLS server certificate is not expired,
//  and that the certificate signature is valid.
//  This does not ensure that it has a chain of authentication to
//  a trusted root.  To ensure that, the TrustedRoots object (below) is required.
$http->put_RequireSslCertVerify(true);

//  Do the HTTPS page fetch (through the SSH tunnel)
$html = $http->quickGetStr($url);
if ($http->get_LastMethodSuccess() != true) {
    print $http->lastErrorText() . "\n";
    exit;
}

print 'The HTTP GET was successful.' . "\n";

//  Now let's require that HTTP requests to SSL/TLS servers that don't have trusted CA roots
//  should fail.
$trustedRoots = new CkTrustedRoots();

//  Indicate that we will trust any pre-installed certificates on this system.
//  (The meaning of pre-installed certificates depends on the operating system, and in
//  some environments there is no such thing as pre-installed certificates.  See the reference
//  documentation for the TrustedRoots class.)
$trustedRoots->put_TrustSystemCaRoots(true);

//  Activate the trusted roots globally for all Chilkat objects.
//  This call really shouldn't fail, so we're not checking the return value.
$success = $trustedRoots->Activate();

//  Given that our previous HTTP GET likely kept the connection open,
//  make sure that all HTTP connections are closed before re-trying.
//  Otherwise, we'll simply be re-using the pre-existing connection.
$success = $http->CloseAllConnections();

//  Now let's try fetching the URL again.  It should fail this time because
//  there is a requirement that the SSL/TLS server certificate must have a trusted root,
//  and the trusted root for this URL is not installed on my system (but may be different for you..)
$html = $http->quickGetStr($url);
if ($http->get_LastMethodSuccess() != true) {
    print $http->lastErrorText() . "\n";
    print 'Good, the HTTP request failed as expected.' . "\n";
}
else {
    print $http->lastErrorText() . "\n";
    print 'Hmmm... we did not fail as expected?' . "\n";
}


?>