// instantiate the class
$mailer = new PHPMailer();;
$mailer->From = "ex@ample.com";
$mailer->FromName = "Test";
$mailer->AddAttachment($_SERVER['DOCUMENT_ROOT']."/path/example.pdf", 'example.pdf');
$mailer->Subject = "Your PDF";
$mailer->Body = 'Well done';
$mailer->AddAddress('recipient@example.com', '');
$mailer->Send();
$mailer->ClearAddresses();
$mailer->ClearAttachments();