login.php

<?php
    $error = '';
    if (isset($_POST['login'])){
        session_start();
        $username = $_POST['username'];
        $password = $_POST['pwd'];
        //location of usernames and passwords
        $userlist = '../private/filetest_02.txt';
        //location to redirect on success
        $redirect = 'http://mike-eng.com/temp/php/sessions/menu.php';
        require_once('../includes/authenticate.inc.php');
    }
?>
<!DOCTYPE HTML>
<html>
    <head>
        <meta charset="utf-8">
        <title>Session test 3</title>
    </head>

    <body>
        <?php if ($error) {
        echo "<p>$error</p>";
        } ?>
        <form id="form1" method="post" action="">
            <p>
                <label for="username">Username:</label>
                <input type="text" name="username" id="username" />
            </p>
            <p>
                <label for="pwd">Password:</label>
                <input type="password" name="pwd" id="pwd" />
            </p>
            <p>
                <input name="login" type="submit" id="login" value="Log in" />
            </p>
        </form>
    </body>
</html>