I'm trying to set up a basic username/password login page and changing the password via writing back to a text file. Here is the code for the page.

Code:
<?php
	//Confirmation for Changed Password

	// Retrieve lists of username and password session variables
	session_start();
	$u_list = $_SESSION["u_list"];
	$p_list = $_SESSION["p_list"];

	print "<html>";
...