<?php
//import the transport from the standard composer directory:
require_once('./vendor/autoload.php');

$transport = new \Postmark\Transport('<SERVER_TOKEN>');
$mailer = new Swift_Mailer($transport);

//Instantiate the message you want to send.
$message = (new Swift_Message('Hello from Postmark!'))
  ->setFrom(['[email protected]' => 'John Doe'])
  ->setTo(['[email protected]'])
  ->setBody('<b>A really important message from our sponsors.</b>', 'text/html')
  ->addPart('Another important message from our sponsors.','text/plain');

//Add some attachment data:
$attachmentData = 'Some attachment data.';
$attachment = new Swift_Attachment($attachmentData, 'my-file.txt', 'application/octet-stream');

$message->attach($attachment);

//Send the message!
$mailer->send($message);
?>

$transport = new \Postmark\Transport('<SERVER_TOKEN>');
$transport->registerPlugin(new \Postmark\ThrowExceptionOnFailurePlugin());

$message = new Swift_Message('Hello from Postmark!');
$mailer->send($message); // Exception is throw when response !== 200

$defaultHeaders = ['X-PM-Tag' => 'my-tag'];

$transport = new \Postmark\Transport('<SERVER_TOKEN>', $defaultHeaders);

$message = new Swift_Message('Hello from Postmark!');

// Overwriting default headers
$message->getHeaders()->addTextHeader('X-PM-Tag', 'custom-tag');

// Change the default stream for every message via Default Headers
$transport = new \Postmark\Transport('<SERVER_TOKEN>', ['X-PM-Message-Stream' => 'your-custom-stream']);

$message = new Swift_Message('Hello from Postmark!');

// Overwrite the default stream for a specific message by setting the header
$message->getHeaders()->addTextHeader('X-PM-Message-Stream', 'another-stream');

$transport = new \Postmark\Transport('<SERVER_TOKEN>', $defaultHeaders);
$mailer = new Swift_Mailer($transport);

$message = new Swift_Message('Hello from Postmark!');

$mailer->send($message);

$postmarkID = $message->getHeaders()->get('X-PM-Message-Id')->getValue();