Convert Certificate from PEM to DER

Convert a PEM formatted certificate file (.cer, .crt, .pem) to DER format (.cer, .der). The Chilkat certificate class/object is a freeware component that is included in many of the Chilkat downloads.

<?php

$cert = new COM("Chilkat.Cert");

//  LoadFromFile will load either PEM and DER formatted files.
//  It automatically recognizes the file format based on the
//  file contents.
$success = $cert->LoadFromFile('chilkat.crt');
if ($success != true) {
    print $cert->lastErrorText() . "\n";
    exit;
}

print $cert->subjectDN() . "\n";

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

print 'success!' . "\n";
?>