GNS.DAIKI

<?php
		if(isset($_POST['Submit'])){

			$db=mysqli_connect('localhost','root','','quiz_marcon');
			$username=$_POST['username'];
			$password=$_POST['password'];
			$sql= "SELECT * from users where username='$username' and password='$password'";

			$result=mysqli_query($db, $sql);
			if (mysqli_num_rows($result)== 0){
				echo '<script language="javascript">';
				echo 'alert("Incorrect Username or Password")';
				echo '</script>';

				}
			else{
				header("Location: display.php");

				}
		}

?>


<html>
 <title>Login Page</title>
<body>
<form method = "post">
<pre>

Input Username:    <input type ="text" name = "username"><br>
Input Password:    <input type ="password" name = "password"><br><input type="Submit" name="Submit" value="Submit">

</pre>
</form>
</body>
</html>