我正在使用 MVC 模式，在我的网站中实现一个部分，以购买公开的文章。然而，我有一个很大的问题来实现这部分，特别是在我的控制器之间交换数据，以及在所有视图中使用这些数据。
现在，我尝试了两种解决方案来在控制器之间传递这些数据：
- 第一个是在我的控制器代码的顶部创建我的模型类的一些对象，可以从所有 switch 分支（以及我的控制器的所有部分）修改它。我不明白为什么，从一个视图传递到另一个视图，总是通过同一个控制器，我的对象被重置并变为空。
- 第二种，一个不太有用的解决方案是使用一个大数组，从一个视图传递到另一个视图（从同一个控制器的 switch 分支到另一个分支），通过一个表单，或者，但是，超全局变量。
我向您展示视图和代码：
第一张图是登录视图；用户没有登录，已经指定了他想要接收对象的格式并且必须登录。
http://i60.tinypic.com/2nq9rfd.jpg
第二张图片是该用户登录后的视图。所有用户和对象数据都是通过查询获得的，但我需要记住用户希望接收图片的格式！
格式……选择的付款方式，等等。
http://i61.tinypic.com/2v2xkt3.jpg
编码..
我的 MVC 模式包含一个 index.php（访问我的站点的唯一点），它实例化一个填充我的 master.php 的类“X”-Controller 的对象。
master.php 是在我的控制器方便的情况下的动态页面填充，它实例化所有变量和对象变量以组成请求的视图。
特别是，这是购买部分的代码：
控制器
（完整（相对）url = /index.php?page=works&subpage=payment&imageID=00000001）
class WorksController
{
public static $counter = 0;
public function __construct(&$request, &$session)
{
self::$counter++;
$this -> handle_input($request, $session);
}
private function handle_input(&$request, &$session)
{
//It create a new Album (class RaccoltaImmagini), that include all pictures (class Immagine) that have to be sell
if(!isset($raccoltaImmagini))
{
$raccoltaImmagini = PicturesCollectionConstructor::buildNewCollection("AllPictures");
}
if(!isset($riepilogoOrdine))
{
//IT creates a new object (class Ordine) that include all infos to complete and to manage the transaction
$riepilogoOrdine = new Ordine(null, null, null, null, null, null, null, null, null);
}
if(!isset($userOBJ))
{
//It creates a new object that rappresent the user logged in and all the data associated (like credential, name, adress, credit card..)
$userOBJ = new AuthenticatedUser(null, null, null, null, null, null,null, null, null, null, null, null, null, null);
}
switch($request["subpage"])
{
default: include("PHP/view/content-not-found.php");
break;
case "payment": //This part of the Controller manage the view to select the payment method:
//if the user is not logged in, the view charge the secondary form for the login
//else the view show a short recap about the options already selected, and the method of payments registered to choose
if(isset($request["imageID"])) //Step 1 - The authenticated user has to choose the payment's method
{
if(isset($_SESSION["loggedIn"]) && $_SESSION[ "loggedIn"])
{
if( isset($session["username"]) && isset($session["password"]))//User authenticated
{
//It show which formats have been selected (it store an array of booleans, where array[$i] is true if the format is requested)
$formati = $riepilogoOrdine -> getAllReservedFormats();
//It initialize the object that represent the authenticated User
$userOBJ = UserConstructor::buildUser($session["username"], $session["password"]);
//It initialize the object that represent the pictures that has to be sell
$describedOBJ = $raccoltaImmagini -> getImagesByID($request["imageID"]);
//- It update, newly, the information about the order:
//-- It associates the user-id to ther order
$riepilogoOrdine -> setUserID($userOBJ -> getID());
//-- it associates the image-id to ther order
$riepilogoOrdine -> setArticleID($describedOBJ -> getID());
//-- it associates the partial import to ther order
$riepilogoOrdine -> setTotalImport($describedOBJ -> getPrice());
$style = "PHP/view/TransactionsStyle.php";
$header = "PHP/view/Header.php";
$loginFormContent = "PHP/view/loggedUserMenu.php";
$slideshow=null;
$works = "PHP/view/Works.php";
$preview250="PHP/view/preview250.php";
$SecondaryLoginForm = null;
$summaryPayments = "PHP/view/summaryPayments.php";
$ToPay = "PHP/view/ToPay.php";
$footer="PHP/view/footer.php";
include("master.php");
}
}
else //Step 0 - The user is not still logged in
{
//It initialize the object that represent the pictures that has to be sell
$describedOBJ = $raccoltaImmagini -> getImagesByID($request["imageID"]);
//- It update the information about the order:
//-- it associates the partial import to ther order
$riepilogoOrdine -> setTotalImport($describedOBJ -> getPrice());
//-- It associates to the order the formats select (obtained trough a previous submit)
if(isset($_REQUEST["formats"]))
{
$formats = array();
$formats = $_REQUEST["formats"];
if(isset($formats[0])) //online formats
{
$riepilogoOrdine -> setOnlineFormat(True);
}
if(isset($formats[1])) //gallery1 format
{
$riepilogoOrdine -> setGallery1Format(True);
}
if(isset($formats[2])) //gallery2 format
{
$riepilogoOrdine -> setGallery2Format(True);
}
}
//It show which formats have been selected (it store an array of booleans, where array[$i] is true if the format is requested)
$formati = $riepilogoOrdine -> getAllReservedFormats();
$style = "PHP/view/TransactionsStyle.php";
$header = "PHP/view/Header.php";
$loginFormContent = "PHP/view/LoginFormContent.php";
$works = "PHP/view/Works.php";
$preview250="PHP/view/preview250.php";
$SecondaryLoginForm="PHP/view/SecondaryLoginFormContent.php";
$ToPay = "PHP/view/ToPay.php";
$footer="PHP/view/footer.php";
include("master.php");
}
}
else
{
include("PHP/view/content-not-found.php");
}
break;
[...] //other code omitted
} //swith closure
风景
<?php $IMGid = $describedOBJ -> getID(); ?>
<!-- It contains a recap for every step of transaction -->
<div id="Riepilogo">
<!-- It stores the information about the transaction -->
<div id="Transazione">
<?php if(isset ($SecondaryLoginForm)) include($SecondaryLoginForm); ?> <!-- Step 0: User is not logged in -->
<?php if(isset ($summaryPayments)) include($summaryPayments); ?> <!-- Step 1: User logged in and selection of payment's method -->
<?php if(isset ($shipments)) include($shipments); ?> <!-- Step 2: selection of the shipment's method -->
</div>
<!-- It contains a recap about the pictures to buy -->
<div id="RiepilogoVisuale">
<!-- close the window -->
<button name="chiudi" type="button" id="closingButton" onclick="javascript:chiudi();">Chiudi</button>
<!-- It contains details about the pictures -->
<article id="descrizioneImmagine">
<header id="TitleAuthor">
<h1><?php echo($describedOBJ -> getTitolo());?> by </h1>
<h2><?php echo($describedOBJ -> getAutore());?></h2>
</header>
<section id="previewImmagine">
<img src="<?php echo($describedOBJ -> getPreview850());?>" alt="<?php echo($describedOBJ->getDescrizione());?>">
</section>
<!-- information about price, formats etc -->
<section id="riepilogoAcquisto">
<h1>Riepilogo acquisto:</h1>
<div id="formatiIMG">
<h2>Formati Selezionati</h2>
<ul>
<?php
if(isset($formati["online"]) && $formati["online"])
{?>
<li><?php echo("Formato online (High Res.)")?></li>
<?php }
if(isset($formati["gallery1"]) && $formati["gallery1"])
{?>
<li><?php echo("Formato galleria piccolo(90x160 cm)")?></li>
<?php }
if(isset($formati["gallery2"]) && $formati["gallery2"])
{?>
<li><?php echo("Formato galleria grande (100x200 cm)")?></li>
<?php }?>
</ul>
</div>
<div id="AdditionalInfo">
<section id="prezzo">
<h2>Prezzo:</h2>
<ul>
<li><?php echo($riepilogoOrdine -> getTotalImport())?>€</li>
</ul>
</section>
<section id="spedizione">
<h2>Metodo di spedizione:</h2>
<ul>
<li>Corriere Espresso</li>
</ul>
</section>
</div>
</section>
</article>
</div>
希望大家能帮帮我，谢谢大家的耐心
编辑：我添加了我的 index.php 的代码，它调用了所有的控制器
<?php
//include directives for all the controllers
//code omitted
Dispatcher::dispatch($_REQUEST);
class Dispatcher
{
public static function dispatch(&$REQUEST)
{
session_start();
if(isset($REQUEST["page"]))
{
switch($REQUEST["page"])
{
default:
include("PHP/view/content-not-found.php");
break;
//code from other controllers omitted
case "works":
new WorksController($REQUEST, $_SESSION);
break;
}
}
}
}
?>