Untitled

<!DOCTYPE html>
<!-- file1 : login-combined.php -->
<html>
<body>
<h2>Login form</h2>
<form action=""
    method="get">
  Username *<br>
  <input type="text"
  name="username" ><br>
  Password *<br>
  <input type="password"
   name="password" ><br><br>
  <input type="submit" value="Login">
</form>

<hr>

<?php
// php.net/isset
//FETCH both input
if (isset($_GET['username'])){

    $username=$_GET['username'];
    $password=$_GET['password'];


//check the content
    if($username==null){
        //username blank
        echo "Do provide your username<br>";
    }
    else if($password==null){
        //password blank
        echo "Do provide your password<br>";
    }
    else {
        //do db comparison
        //DISPLAY all input value
        echo "Your username
                is $username <br>";
        echo "Your dummy password
                is ****** <br>";
    }
}//isset
?>

</body>
</html>