/index

## index
<?php
require_once "include/Session.php";
$session = new Session();
if (!isset($session->valid)) {       // user hasn't validated
 $target = $_SERVER['REQUEST_URI'];  // where I'm trying to go
 require_once "login.php";           // forward request to login.php
 exit();
}

require_once "include/menu.php";

$params = (object) $_REQUEST;
print_r($params);

$choices->order = array_fill_keys($menu, "");

//print_r($choices->order);
//print_r($prices);

//if the session gets seriously messed up,
//uncomment the following statement, run, and then re-comment
//$session->unsetAll();

if(isset($params->add)){
	$pick = $_GET['order'];
	$order = preg_replace("/[^A-z0-9\ -]/","",$_GET['order']);

	$sum = 0;
	$qty = 1;

	$session->selections[$order] = 1;
	$choices->order[$order] = "selected";

}
else {
	$session->selections = array();
	$price = "";
	$order = "";
	$sum = "";
	$pick = "";
	$num = "";
}

$selections = $session->selections;

?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Takeout Order</title>
<style type="text/css">
body {
  padding: 10px 20px;
}
form {
  margin: 10px 0;
}
#logout {
  position: absolute;
  top: 10px;
  right: 10px;
}
table {
	width: 250px;
}
</style>
</head>
<body>

<form action="">
<button type='submit'>Start Over</button>
</form>

<h2>Your Order</h2>

<form action="" method="get">
 items:
 <select name="order">
  <?php foreach ($menu as $key => $value): ?>
   <option <?php echo $choices->order[$key] ?>> <?php echo $key?></option>
  <?php endforeach ?>
 </select>
 <input type="submit" name="add" value="Add" />
</form>


<table>
	<tr id = "category">
			<td><?php echo "Item" ?></td>
			<td><?php echo "Price" ?></td>
			<td><?php echo "#" ?></td>
	</tr>
	<?php foreach ($selections as $order => $value ): ?>
		<?php $sum += ($menu[$order]); ?>

		<tr>
			<td><?php echo $order ?></td>
			<td><?php echo ($menu[$order])?></td>
			<td><?php echo (++$session->selections[$order]) ?></td>
		</tr>

	<?php endforeach ?>

		<tr>
			<td><?php echo "Total: "?></td>
			<td><?php echo $sum ?></td>
		</tr>

</table>

<form id="logout" action="logout.php">
   <input type="hidden" name="target" value="." />
   <input type="submit" value="logout" />
</form>

</body>
</html>

## menu
<?php

$menu = array(
  "Nachos" => "7.79",
  "Buffalo Wings" => "5.99",
  "Egg Rolls" => "4.99",
  "Tostada Chips" => "1.99",

  "Chicken Fajita Salad" => "6.89",
  "Spinach Salad" => "6.79",
  "Chicken Caesar Salad" => "7.49",

  "Margarita Grilled Chicken" => "8.99",
  "Margarita Grilled Tuna" => "8.49",
  "Grilled Pork Chops" => "10.99",

  "Bacon Burger" => "6.49",
  "OldTimer Burger" => "5.59",
  "Mushroom-Swiss Burger" => "6.29",
);

## session
<?php
session_start();

define( "SECRET", "-set-this-to-make-sessions-secure-" );
define( "HASH", md5(dirname(__FILE__) . SECRET) );
define( "KEY", "sess_" . HASH );

class Session {
  public function __set($name,$value) {
    $_SESSION[KEY][$name] = $value;
  }
  public function & __get($name) {
    return $_SESSION[KEY][$name];
  }
  public function __toString() {
    return print_r($_SESSION[KEY],true);
  }
  public function __isset($name) {
    return isset($_SESSION[KEY][$name]);
  }
  public function __unset($name) {
    unset($_SESSION[KEY][$name]);
  }
  public function unsetAll() {
    unset($_SESSION[KEY]);
  }
}
	<?php
	require_once "include/Session.php";
	$session = new Session();
	if (!isset($session->valid)) { // user hasn't validated
	$target = $_SERVER['REQUEST_URI']; // where I'm trying to go
	require_once "login.php"; // forward request to login.php
	exit();
	}

	require_once "include/menu.php";

	$params = (object) $_REQUEST;
	print_r($params);

	$choices->order = array_fill_keys($menu, "");

	//print_r($choices->order);
	//print_r($prices);

	//if the session gets seriously messed up,
	//uncomment the following statement, run, and then re-comment
	//$session->unsetAll();

	if(isset($params->add)){
	$pick = $_GET['order'];
	$order = preg_replace("/[^A-z0-9\ -]/","",$_GET['order']);

	$sum = 0;
	$qty = 1;

	$session->selections[$order] = 1;
	$choices->order[$order] = "selected";

	}
	else {
	$session->selections = array();
	$price = "";
	$order = "";
	$sum = "";
	$pick = "";
	$num = "";
	}

	$selections = $session->selections;

	?>
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
	<title>Takeout Order</title>
	<style type="text/css">
	body {
	padding: 10px 20px;
	}
	form {
	margin: 10px 0;
	}
	#logout {
	position: absolute;
	top: 10px;
	right: 10px;
	}
	table {
	width: 250px;
	}
	</style>
	</head>
	<body>

	<form action="">
	<button type='submit'>Start Over</button>
	</form>

	<h2>Your Order</h2>

	<form action="" method="get">
	items:
	<select name="order">
	<?php foreach ($menu as $key => $value): ?>
	<option <?php echo $choices->order[$key] ?>> <?php echo $key?></option>
	<?php endforeach ?>
	</select>
	<input type="submit" name="add" value="Add" />
	</form>


	<table>
	<tr id = "category">
	<td><?php echo "Item" ?></td>
	<td><?php echo "Price" ?></td>
	<td><?php echo "#" ?></td>
	</tr>
	<?php foreach ($selections as $order => $value ): ?>
	<?php $sum += ($menu[$order]); ?>

	<tr>
	<td><?php echo $order ?></td>
	<td><?php echo ($menu[$order])?></td>
	<td><?php echo (++$session->selections[$order]) ?></td>
	</tr>

	<?php endforeach ?>

	<tr>
	<td><?php echo "Total: "?></td>
	<td><?php echo $sum ?></td>
	</tr>

	</table>

	<form id="logout" action="logout.php">
	<input type="hidden" name="target" value="." />
	<input type="submit" value="logout" />
	</form>

	</body>
	</html>
	<?php
	session_start();

	define( "SECRET", "-set-this-to-make-sessions-secure-" );
	define( "HASH", md5(dirname(__FILE__) . SECRET) );
	define( "KEY", "sess_" . HASH );

	class Session {
	public function __set($name,$value) {
	$_SESSION[KEY][$name] = $value;
	}
	public function & __get($name) {
	return $_SESSION[KEY][$name];
	}
	public function __toString() {
	return print_r($_SESSION[KEY],true);
	}
	public function __isset($name) {
	return isset($_SESSION[KEY][$name]);
	}
	public function __unset($name) {
	unset($_SESSION[KEY][$name]);
	}
	public function unsetAll() {
	unset($_SESSION[KEY]);
	}
	}