php 在 Laravel 4 中使用命名空间
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Using namespaces in Laravel 4
提问by user2030045
I'm new to Laravel and using PHP namespaces in general. I didn't run into any problems until I decided to make a model named File. How would I go about namespacing correctly so I can use my File model class?
我是 Laravel 的新手，一般使用 PHP 命名空间。在我决定制作一个名为 File 的模型之前，我没有遇到任何问题。我将如何正确进行命名空间以便我可以使用我的 File 模型类？
The files are app/controllers/FilesController.phpand app/models/File.php. I am trying to make a new Filein FilesController.php.
这些文件是app/controllers/FilesController.php和app/models/File.php。我正在尝试File在FilesController.php.
回答by Josh Holloway
Namespacing is pretty easy once you get that hang of it.
一旦你掌握了它，命名空间就很容易了。
Take the following example:
以下面的例子为例：
app/models/File.php
应用程序/模型/File.php
namespace App\Models;
class File {
public function someMethodThatGetsFiles()
{
}
}
app/controllers/FileController.php
应用程序/控制器/FileController.php
namespace App\Controllers;
use App\Models\File;
class FileController {
public function someMethod()
{
$file = new File();
}
}
Declare the Namespace:
声明命名空间：
namespace App\Controllers;
Remember, once you've put a class in a Namespace to access any of PHP's built in classes you need to call them from the Root Namespace. e.g: $stdClass = new stdClass();will become $stdClass = new \stdClass();(see the \)
请记住，一旦将类放入命名空间以访问任何 PHP 内置类，您就需要从根命名空间调用它们。例如：$stdClass = new stdClass();将成为$stdClass = new \stdClass();（见\）
"Import" other Namespaces:
“导入”其他命名空间：
use App\Models\File;
This Allows you to then use the Fileclass without the Namespace prefix.
这允许您使用File没有命名空间前缀的类。
Alternatively you can just call:
或者，您可以致电：
$file = new App\Models\File();
But it's best practice to put it at the top in a usestatement as you can then see all the file's dependencies without having to scan the code.
但是最好将它放在use语句的顶部，因为这样您就可以看到所有文件的依赖项而无需扫描代码。
Once that's done you need to them run composer dump-autoloadto update Composer's autoload function to take into account your newly added Classes.
完成后，您需要运行它们composer dump-autoload以更新 Composer 的自动加载功能，以将您新添加的类考虑在内。
Remember, if you want to access the FileController via a URL then you'll need to define a route and specify the full namespace like so:
请记住，如果您想通过 URL 访问 FileController，那么您需要定义一个路由并指定完整的命名空间，如下所示：
Route::get('file', 'App\Controllers\FileController@someMethod');
Which will direct all GET /file requests to the controller's someMethod()
这会将所有 GET /file 请求定向到控制器的 someMethod()
Take a look at the PHP documentation on Namespacesand Nettut's is always a good resource with thisarticle
回答by Pierre Broucz
first, load your class with:
首先，加载您的类：
$ composer dump-autoload
then
然后
$file = new File;
// your stuff like:
$file->name = 'thename';
$file->active = true;
$file->save();
回答by ipixelsmediaworks
To namespace your model, at the top of your model class right after the opening
要命名您的模型，请在模型类的顶部打开后立即
Then when you call from controllers you will call new Whatever\Model;
然后当您从控制器调用时，您将调用 new What\Model;
You probably have to do a dump-autoload with composer the first time around.
您可能必须在第一次使用 composer 进行转储自动加载。
回答by Muhammad Saeed
have a look to it.. hopefully will clear your query....
看看它.. 希望能清除您的查询..
<?php
namespace app\controllers;
use yii\web\Controller;
use app\models\users;
class UserController extends Controller{
public function actionIndex()
{
echo "working on .....";
}
}
回答by Eric McWinNEr
Namespaces are defined at the top of PHP classes right after the opening php script tag like this:
命名空间在 PHP 类的顶部定义在打开 php 脚本标签之后，如下所示：
<?php
namespace MyNameSpace;
When you then want to use the namespaced class in some other class, you define it like this:
当您想在其他类中使用命名空间类时，您可以像这样定义它：
new MyNameSpace\PhpClass;
or import it at the top of the file (after namespaces if present) like this:
或将其导入文件顶部（如果存在命名空间之后），如下所示：
<?php
//namespace
use MyNameSpace\MyPHPClass;
//then later on the code you can instantiate the class normally
$myphpclass = new MyPHPClass();
In Laravel namespaces can be defined anywhere composer can autoload them, I'd recommend defining namespaces within the app directory. So you can define a namespace like Utils for holding Utility classes by creating a Utils directory in the app directory, creating our utility classes and defining the namespace as we did above.
在 Laravel 命名空间中，可以在 composer 可以自动加载它们的任何地方定义命名空间，我建议在 app 目录中定义命名空间。因此，您可以通过在 app 目录中创建一个 Utils 目录，创建我们的实用程序类并定义命名空间来定义一个像 Utils 这样的命名空间来保存实用程序类。
Afterwards you have run the command to ask composer to autoload classes:
之后，您运行命令要求作曲家自动加载类：
$ composer dump-autoload
