Untitled

login.php


    // Start the session
    session_start();

    // Defines username and password.

    $username = "admin";
    $password = "password";

    // Error message
    $error = "";

    // jestli jsi lognuty
    if (isset($_SESSION['loggedIn']) && $_SESSION['loggedIn'] == true) {
        $error = "success";
        header('Location: success.php');
    }

 //  jestli je vse zadane
    if (isset($_POST['username']) && isset($_POST['password'])) {
        if ($_POST['username'] == $username && $_POST['password'] == $password) {
            $_SESSION['loggedIn'] = true;
            header('Location: success.php');
        } else {
            $_SESSION['loggedIn'] = false;
            $error = "Ĺ patnĂ© jmĂ©no nebo heslo :D";
        }
    }


?>

<html>
    <head>
        <title>Login</title>
<link rel="stylesheet" type="text/css" href="style.css">
    </head>

    <body style="text-align: center;">


        <!-- Output error message if any -->
        <?php echo $error; ?>

   <br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>>

        <!-- form for login -->

      <div id="frm">
        <form method="post" action="login.php" style="background-color: lime">
            <label for="username">Jmeno:</label><br/>
            <input type="text" name="username" id="username"><br/>
            <label for="password">Heslo:</label><br/>
            <input type="password" name="password" id="password"><br/>
            <input type="submit" value="Prihlasit!!" id="btn" name="btn">
        </form>

 <form action="/index.php" style="background-color: lime">
 <br>
<input type="submit" value="ZPET" style="text-align:left" id="btn2" name="btn2">
 </form>
</div>

<br><br><br><br><br><br><br><br><br><br>
    </body>


success.php

<?php
  // Start the session
    ob_start();
    session_start();

    // Check to see if actually logged in. If not, redirect to login page
    if (!isset($_SESSION['loggedIn']) || $_SESSION['loggedIn'] == false) {
        header("Location: login.php");   }
        ?>


logout.php

<?php
    session_start();
    $_SESSION['loggedIn'] = false;
    header("Location: login.php");
?>