不返回接口實例的類PHP

Question

我在實現接口的類上收到奇怪的錯誤。

錯誤：

Catchable fatal error: Argument 1 passed to MyApp\Library\Cache::__construct() must be an instance of MyApp\Contacts\CacheInterface, instance of MyApp\Driver\Cache\File given

文件類：

namespace MyApp\Driver\Cache; 
use MyApp\Library\Config; 
use MyApp\Contracts\CacheInterface; 

class File implements CacheInterface { 
    private $expire; 

    public function __construct($expire, Config $config) { 
     $this->expire = $expire; 
     $this->config = $config; 

     ... more code 
    } 
} 

緩存類：

namespace MyApp\Library; 
use MyApp\Contacts\CacheInterface; 

final class Cache { 

    private $cache; 

    public function __construct(CacheInterface $cache) { 
     $this->cache = $cache; 
    } 

    ... more methods 
} 

接口：

namespace MyApp\Contracts; 
interface CacheInterface { 

    public function get($key); 
    public function set($key, $value); 
    public function delete($key); 
    public function flush_cache(); 
} 

實現爲一個疙瘩容器中的服務，像這樣：

$this->data['cache'] = function ($data) { 
    switch ($data['config_cache_type_id']): 
     case 'apc': 
      $driver = new Apc($data['cache.time'], $data['config']); 
      break; 
     case 'mem': 
      $driver = new Mem($data['cache.time'], $data['config']); 
      $driver->connect(); 
      break; 
     case 'file': 
     default: 
      $driver = new File($data['cache.time'], $data['config']); 
      break; 
    endswitch; 

    return new Cache($driver); 
}; 

當然4個驅動和高速緩存類都包含與容器類前use關鍵字。

我看不到我在想什麼我在完全相同的過程中完成了其他幾個合同。任何想法，將不勝感激。

Answer 1

在你File.class，你可以嘗試更換：

use MyApp\Contracts\CacheInterface; 

隨着

use MyApp\Contacts\CacheInterface; 

而對於你的界面，使用：

namespace MyApp\Contacts;