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我最近开始用 PHP 编写自定义 MVC 框架。这基本上是一个学习练习。

我的课程位于以下目录中：

  • 系统/库/
  • 系统/控制器/
  • 系统/型号
  • 应用程序/库/
  • 应用程序/控制器/
  • 应用/模型

我没有使用命名空间，因为我不知道如何使用命名空间和 Apache 2 处理程序样式 URL（控制器/操作/id）来实例化控制器。我创建了一个 Bootstrap 类来自动加载我的其他类：

class Bootstrap
{
  public function autoloadClasses($class)<br/>
  {
    $class .= '.php';

    $classDirectories = array(
        SYSTEM_LIBS_DIR,
        SYSTEM_CONTROLLERS_DIR,
        SYSTEM_MODELS_DIR,
        APPLICATION_LIBS_DIR,
        APPLICATION_CONTROLLERS_DIR,
        APPLICATION_MODELS_DIR
    );

    foreach ($classDirectories as $classDirectory) {
        $directoryIterator = new DirectoryIterator($classDirectory);
        foreach($directoryIterator as $file) {
            if ($file == $class) {
                include $classDirectory . $class;
                break 2;
            }
        }
    }

  }


  public function register()
  {
    spl_autoload_register(array($this, 'autoloadClasses'), true);
  }


  public function init()
  {
    $this->register();
    $loader = new Loader($_GET);
    $controller = $loader->createController();
    $controller->executeAction();
  }
}

它工作正常。但是，我知道我真的应该使用 PSR-0 推荐的实现：

https://gist.github.com/221634

However, I can't figure out how to get it to work without namespaces. It looks like the namespace is an optional pararmeter. However, if I do the following, nothing happens -- not even an error in the Apache logs:

$libLoader = new SplClassLoader('', 'system/libraries');
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2 回答 2

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The goal of PSR-0 was to try and specify how external third-party library classes should be named, and where the files containing those classes should live on disk. This goal was accomplished, and from a high level, it's not too bad of a thing. Interopability and not stepping all over other libraries is a good thing.

Your directory layout and class naming scheme doesn't mesh with PSR-0, which means SplClassLoader is going to be nigh-useless for you.

You have two options:

  1. Rename all of your classes, shuffle them into a namespace hierarchy, and refactor the rest of the code that needs to worry about it, or
  2. Don't use SplClassLoader and write your own autoloader.

If you're building a library intended for external distribution, it'll be a good idea to make yourself PSR-0 compliant, as it's pretty darn simple, logical and painless.

If you're building your own app for your own use and don't intend it as a library, then you are under no requirement to do all of that work, and you shouldn't, because it'd be silly. This looks like it's the case, so I can end with a big fat: don't bother.

于 2012-12-17T19:59:22.280 回答
0

I got it to work. YAY!

Here is the code from my front controller (index.php) I'm going to refactor it since it would be cleaner to simply make one call to some type of bootstrap class:

<?php
use NeilMVC\system\libraries\Loader;
require_once('conf/conf.php');
require_once('SplClassLoader.php');

$loadSystemLibraries = new SplClassLoader('NeilMVC\system\libraries'); 
$loadSystemControllers = new SplClassLoader('NeilMVC\system\controllers');
$loadSystemModels = new SplClassLoader('NeilMVC\system\models');

$loadApplicationLibraries = new SplClassLoader('NeilMVC\application\libraries');
$loadApplicationControllers = new SplClassLoader('NeilMVC\application\controllers');
$loadApplicationModels = new SplClassLoader('NeilMVC\application\models');

$loadSystemLibraries->register();
$loadSystemControllers->register();
$loadSystemModels->register();

$loadApplicationLibraries->register();
$loadApplicationControllers->register();
$loadApplicationModels->register();

$loader = new Loader($_GET);
$controller = $loader->createController();
$controller->executeAction();

I had to refactor some of the classes in order to resolve fully qualified classes to unqualified names used in the MVC-style URLs. It wasn't that hard to do, I just had to tinker with it to understand it. If anyone want to know more, you can email me through my website http://neilgirardi.com

Cheers and happy holidays!

于 2012-12-19T15:48:42.857 回答