(PHP ActiveX) Send HTML Email with CSS as Related Item using Content-Location

Demonstrates how to compose an HTML email with an external CSS file included as a related item and referenced by Content-Location.

Some email clients display embedded (related) content best using CID's (Content-IDs), whereas other email clients display related content best by Content-Location. The choice you make may depend on the software used by the intended recipient of your email. (Does' the recipient read email on an iPhone? Android? Outlook? GMail? Thunderbird? etc.)

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 requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// The mailman object is used for sending and receiving email.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.MailMan')
$mailman = new COM("Chilkat.MailMan");

// Use your SMTP server hostname.  This example uses office365, but it could be any SMTP server..
$mailman->SmtpHost = 'outlook.office365.com';
$mailman->SmtpPort = 587;
$mailman->StartTLS = 1;

// Set the SMTP login/password
$mailman->SmtpUsername = 'OFFICE365-SMTP-LOGIN';
$mailman->SmtpPassword = 'OFFICE365-SMTP-PASSWORD';

// Create a new email object
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Email')
$email = new COM("Chilkat.Email");
$email->Subject = 'HTML Email with embedded CSS';
$email->From = 'Chilkat Support <my-office365-user@mydomain.com>';
$email->AddTo('Chilkat Support','support@chilkatsoft.com');

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbCss = new COM("Chilkat.StringBuilder");
$bCrlf = 1;
$sbCss->AppendLine('body {',$bCrlf);
$sbCss->AppendLine('    background-color: powderblue;',$bCrlf);
$sbCss->AppendLine('}',$bCrlf);
$sbCss->AppendLine('h1 {',$bCrlf);
$sbCss->AppendLine('    color: blue;',$bCrlf);
$sbCss->AppendLine('}',$bCrlf);
$sbCss->AppendLine('p {',$bCrlf);
$sbCss->AppendLine('    color: red;',$bCrlf);
$sbCss->AppendLine('}',$bCrlf);

// The filenameInHtml is what should exists within the HTML (in the href atribute)
$filenameInHtml = 'styles.css';
// Call AddRelatedString2 to use Content-Location.
$email->AddRelatedString2($filenameInHtml,$sbCss->getAsString(),'utf-8');

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbHtml = new COM("Chilkat.StringBuilder");
$sbHtml->AppendLine('<!DOCTYPE html>',$bCrlf);
$sbHtml->AppendLine('<html>',$bCrlf);
$sbHtml->AppendLine('<head>',$bCrlf);
$sbHtml->AppendLine('  <link rel=\'stylesheet\' href=\'styles.css\'>',$bCrlf);
$sbHtml->AppendLine('</head>',$bCrlf);
$sbHtml->AppendLine('<body>',$bCrlf);
$sbHtml->AppendLine('',$bCrlf);
$sbHtml->AppendLine('<h1>This is a heading</h1>',$bCrlf);
$sbHtml->AppendLine('<p>This is a paragraph.</p>',$bCrlf);
$sbHtml->AppendLine('',$bCrlf);
$sbHtml->AppendLine('</body>',$bCrlf);
$sbHtml->AppendLine('</html>',$bCrlf);

$email->SetHtmlBody($sbHtml->getAsString());

$success = $mailman->SendEmail($email);
if ($success != 1) {
    print $mailman->LastErrorText . "\n";
}
else {
    print 'Mail Sent!' . "\n";
}


?>