";
$post_xml = htmlentities($post_xml);
$consumer = new OAuthConsumer($consumer_key, $consumer_secret);
//post transaction to pesapal
$iframe_src = OAuthRequest::from_consumer_and_token($consumer, $token, "GET", $iframelink, $params);
$iframe_src->set_parameter("oauth_callback", $callback_url);
$iframe_src->set_parameter("pesapal_request_data", $post_xml);
$iframe_src->sign_request($signature_method, $consumer, $token);
//display pesapal - iframe and pass iframe_src
?>