login.php

<?php
	mysql_connect("localhost", "root", "") or die(mysql_error());
	mysql_select_db("unity") or die(mysql_error());

	$Username = mysql_real_escape_string($_POST['username']);
	$Password = mysql_real_escape_string($_POST['password']);

	//      Check to see if the user exits.
	$existsResult = mysql_query("SELECT username, password FROM members WHERE username='$Username' AND password='$Password'");
	$num_rows = mysql_num_rows($existsResult);

	if ($num_rows > 0)
	{
		if ($row = mysql_fetch_array( $existsResult ))
		{
			$registeredUser = $row['username'];
			$registeredPassword = $row['password'];
			$salt = "sdffkjnerih87845kjhwd87326tr32uiytd7f635ridfgtc4i876r5duk3fiu6e53re6d86435die6375d3sdf678";

			$Password = hash('sha256', $salt.$Password);

			if ($Password  == $registeredPassword)
			{
				echo "Success! Valid password";
			}
			else
			{
				echo "$Password : $registeredPassword";

			}
		}
	}
	else
	{
		die("No account under that username.");
	}
?>