<?php
    //link to the related librairy and the set functions
    require_once '../library/config.php';
    require_once '../library/functions.php';

    //If errors:
    $error_message = '';
    if (isset($_POST['user_name'])) {
    if ($_POST['user_name'] == 'books' && $_POST['password'] == 'insects') {
    $_SESSION['islogged'] = true;
    header('Location:indexoo.php');
    exit;
    } 
    else {
    $error_message = "The entered user name or password are not correct ..";
    }        
    } 
    ?>

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
    <head>
    <title>Login Example</title>
    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
    <link rel="stylesheet" type="text/css" href="../css/styles.css" />
    <style type=text/css></style>
    </head>
    <body>
    <center>
    <img src = "books.jpg">
    <br />
    <br />
    <br />
    <form action="" method="post" name="log_example" id="log_example">
    <table class = "principal">
    <tr> 
    <td>User name</td>
    <td><input size="35" maxlength="255"  name="user_name" type="text" id="user_name" value="books"></td>
    </tr>
    <tr> 
    <td>Password</td>
    <td><input size="35" maxlength="255"  name="password" type="password" id="password" value="insects"></td>
    </tr>
    <tr> 
    <td>&nbsp;</td>
    <td><input size="35" maxlength="255" type="submit" name="Submit" value="Log in"> 
    </td>
    </tr>
    </table>
    </form>

    <?php
    // if an error occurs:
    if ($error_message != '') {
    echo '<p align="center"><font color="#8B008B">' . $error_message . '</font></p>';
    } 
    ?>

    </center>
    </body>
    </html>