PHP Laravel：未找到特徵

Question

我在命名空間和使用方面遇到了一些麻煩。

我得到這個錯誤： 「特質的 '結算\ BillingInterface' 未找到」

這些都是在我的Laravel應用程序的文件：

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; 
    } 
} 

如何正確使用use和namespace？

Answer 1

BillingInterface是interface不是trait。因此，它無法找到不存在的特質

你也呼籲BillingInterface在一個叫做Billing\BillingInterface命名空間的接口，接口的全名是：\Billing\BillingInterface\BillingInterface

也許你的意思是

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 
} 

或將其用作特徵。

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，但完全有資格的名字。

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; 
    } 
}