PHP Laravel:找不到特征

Question

命名空间和使用方面我遇到了一些麻烦.

我收到此错误:"找不到特征'Billing\BillingInterface'"

这些是我的Laravel应用程序中的文件:

Billing.php

namespace Billing\BillingInterface;

interface BillingInterface
{
    public function charge($data);
    public function subscribe($data);
    public function cancel($data);
    public function resume($data);
}

PaymentController.php

use Billing\BillingInterface;

class PaymentsController extends BaseController
{
    use BillingInterface;

    public function __construct(BillingPlatform $BillingProvider)
    {
        $this->BillingProvider = $BillingProvider;
    }
}

如何正确使用use和namespace？

Answer 1

BillingInterface是interface不是trait.因此,它找不到不存在的特征

您BillingInterface还在名称空间中调用了一个接口Billing\BillingInterface,该接口的完全限定名称是:\Billing\BillingInterface\BillingInterface

也许你的意思是

use Billing\BillingInterface\BillingInterface;
// I am not sure what namespace BillingPlatform is in, 
// just assuming it's in Billing.
use Billing\BillingPlatform;

class PaymentsController extends BaseController implements BillingInterface
{
    public function __construct(BillingPlatform $BillingProvider)
    {
        $this->BillingProvider = $BillingProvider;
    }

    // Implement BillingInterface methods
}

或者将其用作特征.

namespace Billing;

trait BillingTrait
{
    public function charge($data) { /* ... */ }
    public function subscribe($data) { /* ... */ }
    public function cancel($data) { /* ... */ }
    public function resume($data) { /* ... */ }
}

再次修改PaymentsController,但具有完全限定名称.

class PaymentsController extends BaseController
{
    // use the fully qualified name
    use \Billing\BillingTrait;

    // I am not sure what namespace BillingPlatform is in, 
    // just assuming it's in billing.
    public function __construct(
        \Billing\BillingPlatform $BillingProvider
    ) {
        $this->BillingProvider = $BillingProvider;
    }
}