check email against stopforumsspam DB

spam-test.php

<?php
  $spam = file_get_contents('http://www.stopforumspam.com/api?' . http_build_query(array('email' => pun_trim($_POST['req_email1']), 'f' => 'json')));
  $json = json_decode($spam);

	if ($json->email->appears == 1) {
		header("HTTP/1.1 403 Unauthorized", 403);
		die("We don't like spammers. Clean up your name at http://www.stopforumspam.com/ ");
	}