(PHP Extension) Access Attached Message (Embedded Email)

How to access an email embedded within another email (i.e. an attached message).

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

<?php

include("chilkat.php");
// Use "chilkat_9_5_0.php" for versions of Chilkat < 10.0.0

$email = new CkEmail();

// Load an email from a .eml
$success = $email->LoadEml('embeddedEmail.eml');
if ($success != true) {
    print $email->lastErrorText() . "\n";
    exit;
}

// Display how many attached emails are embedded within
// this one:
$numAttached = $email->get_NumAttachedMessages();
print 'numAttached = ' . $numAttached . "\n";

// Get the 1st attached message.

// email2 is a CkEmail
$email2 = $email->GetAttachedMessage(0);
if ($email->get_LastMethodSuccess() == true) {

    // Display the subject, From, and a header field...
    print $email2->subject() . "\n";
    print $email2->from() . "\n";
    print $email2->getHeaderField('X-SOMETHING') . "\n";
}


?>