sparkpost_curl_example.php

<?php
/*

// recipients array example
$recipients = array(
  array('address'=>
    array(
      'email' => 'email@tld.com',
      'name'=>'Carlos Cabral'
    )
  )
)

// images array example
$images = array
  array(
    'type'=>'image/jpeg',
    'name'=>$cid,
    'data'=>base64_encode(file_get_contents($filename))
  )
);
*/

function sendMessage($key,$campaign_id,$from,$replyTo,$recipients,$subject,$text,$html,$images=array(),$attachments=array()) {
$curl = curl_init();

	$array_post_fields = array(
		"campaign_id" => $campaign_id,
		"transactional" => true,
		"content" => array(
			"reply_to" => $replyTo,
			"from" => $from,
			"subject" => $subject,
			"text" => $text,
			"html" => $html
		)
	);

	if (is_array($recipients)) {
		$array_post_fields['recipients'] = $recipients;
	} else {
		$array_post_fields['list_id'] = $recipients;
	}

	if (sizeof($images)>0) {
		$array_post_fields["content"]["inline_images"] = $images;
	}
	if (sizeof($attachments)>0) {
		$array_post_fields["content"]["attachments"] = $attachments;
	}

	curl_setopt_array($curl, array(
	  CURLOPT_URL => "https://api.sparkpost.com/api/v1/transmissions?num_rcpt_errors=3",
	  CURLOPT_RETURNTRANSFER => true,
	  CURLOPT_ENCODING => "",
	  CURLOPT_MAXREDIRS => 10,
	  CURLOPT_TIMEOUT => 30,
	  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
	  CURLOPT_CUSTOMREQUEST => "POST",
	  CURLOPT_POSTFIELDS => json_encode($array_post_fields),
	  CURLOPT_HTTPHEADER => array(
	    "accept: application/json",
	    "authorization: ".$key
	    "cache-control: no-cache",
	    "content-type: application/json"
	  ),
	));

	$response = curl_exec($curl);
	$err = curl_error($curl);

	curl_close($curl);

	if ($err) {
	  $status = 'error';
	  $result = $err;
	} else {
	  $status = 'ok';
	  $result = $response;
	}

	return array('status'=>$status,'result'=>$result);
  }