script to check for spammers

[Jon]

due to the number of spammers constantly trying to get into the forum, etc, i have made a script that checks a given ip, email or both, against a spam database. good to use when someone tries to register a new account.

require_once('socket.php');
function is_spam_bot($spam_ip='',$spam_email=''){

  /* this will check for just an ip, or just an email address, or both */

  if ($spam_email!='')
    if (get_spam_element('email='.$spam_email)) return TRUE;

  if ($spam_ip!='')
    if (get_spam_element('ip='.$spam_ip)) return TRUE;

  return FALSE;

}

function get_spam_element($s){

  $socket=new Socket();
  if (!$socket->connect('www.stopforumspam.com',80)) return FALSE;

  $packet='GET /api?'.$s.' HTTP/1.0'.chr(13).chr(10).
          'Host: '.$socket->server.chr(13).chr(10).chr(13).chr(10);

  $socket->send($packet);

  if (strpos($socket->receive(),'<appears>yes</appears>')!==false) return TRUE;

  return FALSE;

}

<?php

/* Socket Wrapper
  by Sharp Dressed Codes
  http://sharpdressedcodes.com
  12th September, 2008
*/


class Socket {

var $server='';
var $port=0;
var $type='TCP';
var $handle=NULL;

function connect($server='',$port=0){

  if ($server!='') $this->server=$server;
  if ($port>0) $this->port=$port;
  if (!is_null($this->handle)) close();

  $this->handle = socket_create(AF_INET, SOCK_STREAM, ($this->type=='TCP'?SOL_TCP:SOL_UDP));

  if (!@socket_connect($this->handle, $this->server, $this->port)){
    return FALSE;
  } else {
    return TRUE;
  }

}

function close(){
  if (!is_null($this->handle)){
    @socket_close($this->handle);
    $this->handle=NULL;
  }
  return TRUE;
}

function send($data=''){
  if (!is_null($this->handle)){
    socket_send($this->handle, $data, strlen($data), 0);
    return TRUE;
  }
  return FALSE;
}

function receive($close_data=''){
  $buffer='';
  $packet='';
  while (socket_recv($this->handle, $packet, 2048, 0) > 0){
    $buffer .= $packet;
    if ($close_data!=''){
      if (strpos($buffer,$close_data)) break;
    }
  }
  return $buffer;
}

}

?>

it originally used fopen to check the database, but my gay hosting decided to remove that function, so i had to resort to using a socket.