(PHP Extension) Convert to DER encoded X.509 Certificate (.cer, .crt)

Loads a digital certificate from any format and saves to a binary DER encoded X.509 Certificate (.cer, .crt).

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");

$cert = new CkCert();

//  LoadFromFile will load virtually any certificate format file.
//  It will auto-recognize the format and load appropiately.
//  In this case, load a PEM format certificate and convert to DER.
$success = $cert->LoadFromFile('/Users/chilkat/testData/pem/chilkat.pem');
if ($success != true) {
    print $cert->lastErrorText() . "\n";
    exit;
}

$success = $cert->ExportCertDerFile('chilkat.der');
if ($success != true) {
    print $cert->lastErrorText() . "\n";
    exit;
}

print 'Converted certificate from PEM to DER format.' . "\n";

?>