<?php

include '../setup.php';
$file = EchoSign\Info\FileInfo::createFromFile($filepath);
$recipients = new EchoSign\Info\RecipientInfo();
$recipients->addRecipient($recipient_email);
$document = new EchoSign\Info\DocumentCreationInfo('Test sendDocumentMegaSign', $file);
$document->setSignatureFlow('SENDER_SIGNATURE_NOT_REQUIRED')->setRecipients($recipients)->setMergeFields(new EchoSign\Info\MergeFieldInfo($merge_fields));
try {
    $result = $api->sendDocumentMegaSign($document);
} catch (Exception $e) {
    print '<h3>An exception occurred:</h3>';
    var_dump($e);
}
var_dump($result);