<?php
error_reporting(0);
include_once('config.php');
$dbhost = 'localhost';
$dbname = 'timeline';
$dbuser = 'root';
    list($userName, $mailDomain) = split("@", $_POST['email']);
    function myCheckDNSRR($hostName, $recType = '')
    {
      if(!empty($hostName)) {
        if( $recType == '' ) $recType = "MX";
        exec("nslookup -type=$recType $hostName", $result);
        foreach ($result as $line) {
          if(eregi("^$hostName",$line)) {
            return true;
          }
        }
        return false;
      }
      return false;
    }

function error($error){
$fullerror = "<h1> An Error Occurred</h1><p>".$error."</p>";
die($fullerror . "</div></body></html>");
}

function checkString($str,$filter)
{
	foreach($filter as $key=>$value)
	{
	$inFilter = strpos($str, $value);
	if($inFilter === false)
	{
		$hold = false;
	} else {
		return true;
	}
	}
	return $hold;
}

mysql_connect($dbhost, $dbuser)or error("Could not connect: ".mysql_error());
mysql_select_db($dbname) or error(mysql_error());

if (isset($_POST['submit'])) {
	$u = $_POST['username'];
 if (!$_POST['username'] | !$_POST['pass'] | !$_POST['pass2'] ) {
 		error('You did not complete all of the required fields');
 	}
 if (!get_magic_quotes_gpc()) {
		$_POST['username'] = addslashes($_POST['username']);
 	}
 if(ereg("[^A-Za-z0-9]", $_POST['username'])){
	error("Your username is invalid");
	}
	if (checkString(strtolower($_POST['username']), $flt)==true) {
		error("Your username is invalid");
	}

 if(substr($_POST['username'], 0,1) == " " || substr(strrev($_POST['username']), 0,1) == " "){
	error('Undefined Error');
	}

	$_POST['username'] =  mysql_real_escape_string($_POST['username']);
	$_POST['pass'] =  mysql_real_escape_string($_POST['pass']);
	$_POST['email'] =  mysql_real_escape_string($_POST['email']);
 if (!get_magic_quotes_gpc()) {
	$_POST['pass'] = addslashes($_POST['pass']);
	$_POST['email'] = addslashes($_POST['email']);
	$_POST['username'] = addslashes($_POST['username']);
	}
	require_once('recaptchalib.php');
  $privatekey = "6LfL5MgSAAAAAEkQ4XbAVDDd-1lNFILqW95y_Vve";
  $resp = recaptcha_check_answer ($privatekey,
                                $_SERVER["REMOTE_ADDR"],
                                $_POST["recaptcha_challenge_field"],
                                $_POST["recaptcha_response_field"]);

  if (!$resp->is_valid) {
    // What happens when the CAPTCHA was entered incorrectly
    error("The reCAPTCHA wasn't entered correctly. Go back and try it again.");
  }

    if (!checkdnsrr($mailDomain, "MX")) {
	error('You have entered a invalid email!');
    }

 $usercheck = $_POST['username'];
 if(is_numeric($usercheck)) {
	die('The username cannot be numeric!');
 }

 if(is_numeric($usercheck{0})) {
	die('The username cannot be numeric!');
 }

 if(strlen($usercheck) <= 5){
		error('Your username is too short, it must be at least 6 characters!');
  }
  if(strlen($usercheck) >= 12){
		error('Your username is too long, it can only contain 6-12 letters!');
		}

 $check = mysql_query("SELECT username FROM users WHERE username = '$usercheck'") or error(mysql_error());
 $check2 = mysql_num_rows($check);
{
 if ($check2 != 0) {
 		error('Sorry, the username '.$_POST['username'].' is already in use.');
 }
 if ($_POST['pass'] != $_POST['pass2']) {
		error('Your passwords did not match. ');
 	}
 if(strlen($_POST['pass']) <= 5){
		error('Your password is too short, it must be at least 6 characters! ');
  }

 if(strlen($_POST['username']) <= 3){
	error('Your username is too short, it must be 4 characters or longer! ');
	}
	$password = $_POST['password'];
	}
$mysql_insert = "INSERT INTO users (username, password, email) VALUES(''$usercheck','" . md5(md5($_POST['pass'])) . "','" . $_POST['email'] . "');";
$add_member = mysql_query($mysql_insert);
mysql_free_result($add_member);
mysql_free_result($check);
?>
<h2>You have been registered.</h2>
Dear <b><?php echo $_POST['username'];?></b>, Thank you for registering with us! <br /> You can login <a href="login.php">here</a>