登录标题位置不起作用后

Question

登录标题位置无效后。它保留在login.php并显示为空白页面。我怎么解决这个问题？请帮帮我。

这是我的index.php代码：

<div class="col-sm-12 col-md-12">
  <form action="login.php" method="POST">
      <div class="form-group"> 
        <label>Email</label>
        <input class="form-control" name="email" placeholder="Type your Email..." type="email" required="">
      </div>    
    </div>

    <div class="col-sm-12 col-md-12">
      <div class="form-group"> 
        <label>Password</label>
        <input class="form-control" name="password" placeholder="Type your password..." type="password" required=""> 
      </div>
    </div>

    <div class="col-sm-12 col-md-12">
      <div class="login-box-box-action">
        No account? <a data-toggle="modal" href="#registerModal">Register</a>
      </div>
    </div>

    </div>
    </div>

    <div class="modal-footer text-center">
      <button type="submit" class="btn btn-primary" onclick= "myFunction()">Sign-in</button>
      <button type="button" data-dismiss="modal" class="btn btn-primary btn-border">Cancel</button>
    </div>
  </form>

这是我的login.php代码：

<?php
    include 'db_connection.php';

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


    $sql="SELECT * FROM registration WHERE email='$email' and password='$password'";

    $result = $con->query($sql);
    $count = $result->num_rows;

    if($count==1){
            header("location:index.php");
    }
    else {
        echo "Wrong Username or Password";
    }

?>

据我所知，连接正常。这是db_connection.php代码：

<?php
    $db_host = "localhost";
    $db_user = "root";
    $db_pass = "";
    $db_name = "tourism";

    $con = new mysqli($db_host, $db_user, $db_pass, $db_name);
    if($con->connect_error){
        die("something wrong");
    }
?>