在 Yii2 中使用没有命名空间的类

Using classes without namespace with Yii2(在 Yii2 中使用没有命名空间的类)

问题描述

我想在 Yii2 中使用 Checkout SDK 但因为这个库不支持 PSR-4标准(命名空间)我很难集成它.我怎样才能将这个库用于我的目的?

I want to use Checkout SDK with Yii2 but since this library does not support PSR-4 standards (namespaces) I am having trouble to integrate it. How can I use this library for my purpose?

编辑

建议我尝试使用类作为

As suggested I tried to use class as

$sale = new Twocheckout_Sale();

但我仍然无法让它工作.

but still I am unable to make it work.

推荐答案

当类没有命名空间时，意味着它在根命名空间中.

When the class does not have namespace it means it's in the root namespace.

选项 1:

use Twocheckout;

...

Twocheckout::format('json');

选项 2:

Twocheckout::format('json');

例如，PHPExcel 扩展也没有命名空间，类似的问题在 官方论坛.

For example, PHPExcel extension also doesn't have namespaces, similar question was answered on official forum.

相关问题:

将没有命名空间的类导入到命名空间的类

如何使用root"php的命名空间?

官方 PHP 文档:

http://php.net/manual/en/language.namespaces.fallback.php

更新:

但是 PHPExcel 有自己的自动加载器，而 2Checkout 没有.通过要求一个主要的抽象类来包含所有类.它甚至在官方 readme 中提到:

But PHPExcel has own autoloader, while 2Checkout does not. All classes are included by requiring one main abstract class. It's even mentioned in official readme:

require_once("/path/to/2checkout-php/lib/Twocheckout.php");

所以你需要在使用库类之前手动包含它.可以借助别名来避免写全路径.

So you need to manually include it before using library classes. It can be done with help of alias to avoid writing full path.

use Yii;
...
$path = Yii::getAlias("@vendor/2checkout/2checkout-php/lib/Twocheckout.php");
require_once($path);
$sale = new Twocheckout_Sale();

在一个地方使用是可以的，但是如果要在很多地方使用，最好在入口脚本index.php中require它:

For usage in one place it's OK, but if it will be used in many places of application, it's better to require it in entry script index.php:

require(__DIR__ . '/../../vendor/autoload.php');

require(__DIR__ . '/../../vendor/2checkout/2checkout-php/lib/Twocheckout.php');

require(__DIR__ . '/../../vendor/yiisoft/yii2/Yii.php');
require(__DIR__ . '/../../common/config/bootstrap.php');
require(__DIR__ . '/../config/bootstrap.php');

我还建议阅读官方文档中关于 使用下载的库，根据特定的库，您可以使用更多选项.

I also recommend to read tips in official documentatiton about using downloaded libraries, there are more options you can use depending on the specific library.

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