Narkoman Incorporated

<?php
header('Cache-Control: no-cache, must-revalidate');
?>


<?php
session_name('login');
session_start();

// handle forms
if(isset($_POST['action'])) {

  // login form
  if($_POST['action'] == 'login') {
    if(isset($_POST['username']) && isset($_POST['password'])) {
      if(($hash = sha1($_POST['password'].'magicsalt'.$_POST['username']))
                == 'e48695647d8ec2db8447b83e2782a078ace97a5c') {
        $_SESSION['user'] = array('username' => $_POST['username'], 'hash' => $hash);
      }
    }
  }

  // log out form
  if($_POST['action'] == 'logout') {
    session_unset();
  }

  // add cookie form
  if($_POST['action'] == 'cookie') {
    if(isset($_POST['key']) && isset($_POST['value']) && isset($_POST['age'])) {
      setcookie($_POST['key'], $_POST['value'], time()+$_POST['age'], '/sudoku.php', 'localhost');
      header('Refresh: 0;');
      exit();
    }

    print('<br><br>');
    foreach ($_COOKIE as $key => $value) {
      print($key.'<br>');
      print_r('&nbsp;&nbsp;&nbsp;&nbsp;'.$_COOKIE[$key]);
      print('<br><br>');
    }
  }
}


// display content
if(isset($_SESSION['user'])) {
  print_r($_SESSION['user']);

  print('
  <form method="POST">
    <input type="text" name="key" placeholder="Key"><br>
    <input type="text" name="value" placeholder="Value"><br>
    <input type="number" name="age" placeholder="Age"><br>
    <input type="hidden" name="action" value="cookie">
    <input type="submit" value="Create"><br>
  </form>
  ');

  foreach($_COOKIE as $key => $value) {
    print($key.'<br>');
    print('&nbsp;&nbsp;&nbsp;&nbsp;'.$value.'<br>');
  }

  print('
  <form method="POST" style="position: absolute; right: 0; bottom: 0; margin: 0; padding: 5px;">
    <input type="hidden" name="action" value="logout">
    <input type="submit" value="Log Out">
  </form>
  ');
}else {
  print('
  <form method="POST">
    <input type="text" name="username" placeholder="Username"><br>
    <input type="password" name="password" placeholder="Password"><br>
    <input type="hidden" name="action" value="login">
    <input type="submit" value="Login"><br>
  </form>
  ');
}


$counter = $_COOKIE['counter'] ?? 0;
$counter += 1;
setcookie('counter', $counter, time()+60*60*24*365);
print('<span style="position: absolute; bottom: 0; left: 0;">&nbsp;user counter: '.$counter.'</span>');
?>