Untitled

<?php

session_start();

if (isset($_POST['email']))
 {
   $OK = true;

   $username = $_POST['login'];
   if ((strlen($username)<5) || (strlen($username)>16))
   {
     $OK = false;
     $_SESSION['e_login']="Login musi posiadać od 5 do 16 znaków.";
   }

   if (ctype_alnum($username)==false)
   {
     $OK = false;
     $_SESSION['e_login']="W loginie nie mogą znajdować się polskie znaki.";
   }


    $email = $_POST['email'];
    $emailB = filter_var($email, FILTER_SANITIZE_EMAIL);

    if ((filter_var($emailB, FILTER_VALIDATE_EMAIL)==false) || ($emailB!=$email))
    {
      $OK = false;
      $_SESSION['e_email']="Podaj poprawny adres e-mail.";
    }


    $password = $_POST['password'];
    $password2 = $_POST['password2'];

    if((strlen($password)<8) || (strlen($password)>20))
    {
      $OK = false;
      $_SESSION['e_password']="Hasło powinno zawierać od 8 do 20 znaków.";
    }

    if($password!=$password2)
    {
      $OK = false;
      $_SESSION['e_password']="Podane hasła są inne.";
    }


    $name = $_POST['name'];
    $lastname = $_POST['lastname'];

    if((strlen($name)<3) || (strlen($name)>15))
    {
      $OK = false;
      $_SESSION['e_name']="Podane imię jest za krótkie.";
    }


    if((strlen($lastname)<3) || (strlen($lastname)>20))
    {
      $OK = false;
      $_SESSION['e_lastname']="Podane nazwisko jest za krótkie.";
    }


    $recaptcha = "6LeeVRAUAAAAAEA-qK3-kanpA1iFyePUw3l8IOKC";
    $check = file_get_contents('https://www.google.com/recaptcha/api/siteverify?secret='.$recaptcha.'&response='.$_POST['g-recaptcha-response']);
    $answer = json_decode($check);

    if($answer->success == false)
    {
      $OK = false;
      $_SESSION['e_captcha']="Potwierdź że nie jesteś robotem.";
    }

    require_once "connect.php";
    mysqli_report(MYSQLI_REPORT_STRICT);

      try
      {
        $connect = new mysqli($host, $db_user, $db_password, $db_name);
        if ($connect->connect_errno!=0)
        {
        throw new Exception(mysqli_connect_errno());
        }
        else
        {
          $result = $connect -> query ("SELECT id FROM uzytkownicy WHERE email='$email'");

          if (!$result) throw new Exception($connect->error);

          $howmails = $result->num_rows;
          if($howmails>0)
          {
            $OK = false;
            $_SESSION['e_email']="Ten e-mail już isnieje!";
          }

          $connect->close();
        }
      }
      catch(Exception $e)
      {
        echo '<div class="errorlogin">Błąd serwera. Spróbuj ponownie później.</div>';
      }

    if ($OK==true)
    {
      echo "Rejestracja powiodła się";
      die();
    }

 }

?>

<html lang='pl'>
<head>
  <meta charset="utf-8" />
  <meta http-equiv="X-UA=Compatible" content="IE=edge,chrome=1" />
  <link rel="stylesheet" href="register.css" type="text/css" />
  <link rel="icon" href="obrazki/icon.png">
  <link href="https://fonts.googleapis.com/css?family=Dancing+Script" rel="stylesheet">
  <script src='https://www.google.com/recaptcha/api.js'></script>

  <title> Rejestracja </title>

</head>

<body>

    <center><a class="logo">Classmate</a></center>

      <div class="login">
        <form method="post">
      <center><input type="login" placeholder="Login" maxlength="16" name="login"></br>

        <?php
            if (isset($_SESSION['e_login']))
            {
              echo '<div class="errorlogin">'.$_SESSION['e_login'].'</div>';
              unset($_SESSION['e_login']);
            }
         ?>

      <br><input type="password" placeholder="Hasło" maxlength="20" name="password"></br>

      <br><input type="password" placeholder="Powtórz Hasło" maxlength="20" name="password2"></br>

      <?php
          if (isset($_SESSION['e_password']))
          {
            echo '<div class="errorlogin">'.$_SESSION['e_password'].'</div>';
            unset($_SESSION['e_password']);
          }
       ?>

      <br><input type="email" placeholder="E-mail" name="email"></br>

      <?php
          if (isset($_SESSION['e_email']))
          {
            echo '<div class="errorlogin">'.$_SESSION['e_email'].'</div>';
            unset($_SESSION['e_email']);
          }
       ?>

      <br><input type="name" placeholder="Imię" maxlength="15" name="name"></br>

      <?php
          if (isset($_SESSION['e_name']))
          {
            echo '<div class="errorlogin">'.$_SESSION['e_name'].'</div>';
            unset($_SESSION['e_name']);
          }
       ?>

      <br><input type="name" placeholder="Nazwisko" maxlength="20" name="lastname"></br>

      <?php
          if (isset($_SESSION['e_lastname']))
          {
            echo '<div class="errorlogin">'.$_SESSION['e_lastname'].'</div>';
            unset($_SESSION['e_lastname']);
          }
       ?>

      <br><div class="g-recaptcha" data-sitekey="6LeeVRAUAAAAAFsYtQ5-UTvyNhSvaoHEIEJ1u1BR"></div>

      <?php
          if (isset($_SESSION['e_captcha']))
          {
            echo '<div class="errorlogin">'.$_SESSION['e_captcha'].'</div>';
            unset($_SESSION['e_captcha']);
          }
       ?>

      <br><input type="submit" value="Zarejestruj">

    </form>
          <a href="login.php"><input type="button" value="Powrót"></a></center>

    </div>
</body>
</html>