PHP noob. Creating Login.php

[D F]

I'm newly into an intensive 8 week program for using PHP and MySQL. I've been asked to create a database, this, that, and the other thing. Our professor is very hands off. So I need guidance!

The part of the assignment that I'm stuck on is this:

You need to create a new page called login.php, where you can enter your Emp_ID and Emp_Password. After clicking submit, it should then take the values you have entered and query the Employee table for them.

The coding I have that I'm struggling with is this:

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<?php
include("DF_Employee.php");

if($_SERVER["REQUEST_METHOD"] == "POST") {
$Emp_ID = mysqli_real_escape_string($db,$_POST['eid']);
$Emp_Password = mysqli_real_escape_string($db,$_POST['eps']);

$sql = "SELECT id FROM login WHERE empid = '$empid' and password = '$epass'";
$result = mysqli_query($db,$sql);
$row = mysqli_fetch_array($result,MYSQLI_ASSOC);
$active = $row['active'];

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With include("DF_Employee.php"); it displays all of the text at the top of my page. I don't want to display the text. So I wrote include("employee.sql"); which is just as unhelpful. I definitely need some guidance as to where this information should be pointing.