最新PHP新機能シリーズ(2) -- インターフェースを使いこなす

<?phpnamespace Illuminate\Contracts\Cache;interface Store{    /**     * Retrieve an item from the cache by key.     *     * @param  string|array  $key     * @return mixed     */    public function get($key);    /**     * Retrieve multiple items from the cache by key.     *     * Items not found in the cache will have a null value.     *     * @param  array  $keys     * @return array     */    public function many(array $keys);    /**     * Store an item in the cache for a given number of minutes.     *     * @param  string  $key     * @param  mixed   $value     * @param  int     $minutes     * @return void     */    public function put($key, $value, $minutes);    /**     * Store multiple items in the cache for a given number of minutes.     *     * @param  array  $values     * @param  int  $minutes     * @return void     */    public function putMany(array $values, $minutes);    /**     * Increment the value of an item in the cache.     *     * @param  string  $key     * @param  mixed   $value     * @return int|bool     */    public function increment($key, $value = 1);    /**     * Decrement the value of an item in the cache.     *     * @param  string  $key     * @param  mixed   $value     * @return int|bool     */    public function decrement($key, $value = 1);    /**     * Store an item in the cache indefinitely.     *     * @param  string  $key     * @param  mixed   $value     * @return void     */    public function forever($key, $value);    /**     * Remove an item from the cache.     *     * @param  string  $key     * @return bool     */    public function forget($key);    /**     * Remove all items from the cache.     *     * @return void     */    public function flush();    /**     * Get the cache key prefix.     *     * @return string     */    public function getPrefix();}

<?phpnamespace Illuminate\Cache;use Memcached;use Illuminate\Contracts\Cache\Store;class MemcachedStore extends TaggableStore implements Store{    /**     * The Memcached instance.     *     * @var \Memcached     */    protected $memcached;    /**     * A string that should be prepended to keys.     *     * @var string     */    protected $prefix;    /**     * Create a new Memcached store.     *     * @param  \Memcached  $memcached     * @param  string      $prefix     * @return void     */    public function __construct($memcached, $prefix = '')    {        $this->setPrefix($prefix);        $this->memcached = $memcached;    }    /**     * Retrieve an item from the cache by key.     *     * @param  string|array  $key     * @return mixed     */    public function get($key)    {        $value = $this->memcached->get($this->prefix.$key);        if ($this->memcached->getResultCode() == 0) {            return $value;        }    }    /**     * Retrieve multiple items from the cache by key.     *     * Items not found in the cache will have a null value.     *     * @param  array  $keys     * @return array     */    public function many(array $keys)    {        $prefixedKeys = array_map(function ($key) {            return $this->prefix.$key;        }, $keys);        $values = $this->memcached->getMulti($prefixedKeys, null, Memcached::GET_PRESERVE_ORDER);        if ($this->memcached->getResultCode() != 0) {            return array_fill_keys($keys, null);        }        return array_combine($keys, $values);    }    /**     * Store an item in the cache for a given number of minutes.     *     * @param  string  $key     * @param  mixed   $value     * @param  int     $minutes     * @return void     */    public function put($key, $value, $minutes)    {        $this->memcached->set($this->prefix.$key, $value, $minutes * 60);    }    /**     * Store multiple items in the cache for a given number of minutes.     *     * @param  array  $values     * @param  int  $minutes     * @return void     */    public function putMany(array $values, $minutes)    {        $prefixedValues = [];        foreach ($values as $key => $value) {           $prefixedValues[$this->prefix.$key] = $value;        }        $this->memcached->setMulti($prefixedValues, $minutes * 60);    }    /**     * Store an item in the cache if the key doesn't exist.     *     * @param  string  $key     * @param  mixed   $value     * @param  int     $minutes     * @return bool     */    public function add($key, $value, $minutes)    {        return $this->memcached->add($this->prefix.$key, $value, $minutes * 60);    }    /**     * Increment the value of an item in the cache.     *     * @param  string  $key     * @param  mixed   $value     * @return int|bool     */    public function increment($key, $value = 1)    {        return $this->memcached->increment($this->prefix.$key, $value);    }    /**     * Decrement the value of an item in the cache.     *     * @param  string  $key     * @param  mixed   $value     * @return int|bool     */    public function decrement($key, $value = 1)    {        return $this->memcached->decrement($this->prefix.$key, $value);    }    /**     * Store an item in the cache indefinitely.     *     * @param  string  $key     * @param  mixed   $value     * @return void     */    public function forever($key, $value)    {        $this->put($key, $value, 0);    }    /**     * Remove an item from the cache.     *     * @param  string  $key     * @return bool     */    public function forget($key)    {        return $this->memcached->delete($this->prefix.$key);    }    /**     * Remove all items from the cache.     *     * @return void     */    public function flush()    {        $this->memcached->flush();    }    /**     * Get the underlying Memcached connection.     *     * @return \Memcached     */    public function getMemcached()    {        return $this->memcached;    }    /**     * Get the cache key prefix.     *     * @return string     */    public function getPrefix()    {        return $this->prefix;    }    /**     * Set the cache key prefix.     *     * @param  string  $prefix     * @return void     */    public function setPrefix($prefix)    {        $this->prefix = ! empty($prefix) ? $prefix.':' : '';    }}

<?phpnamespace App\Tests;use Illuminate\Contracts\Cache\Store;class CacheStore{    protected $store;    public function __construct(Store $store)    {        $this->store = $store;    }    public function get($key)    {        return $this->store->get($key);    }    public function put($key, $value, $minutes=1)      {        $this->store->put($key, $value, $minutes);    }    public function forget($key)    {        $this->store->forever($key);    }    public function flush()    {        $this->store->flush();    }}

$memcached = new \Memcached();$memcached->addServer('localhost',11211);$memcachedCache = new MemcachedStore($memcached);$cacheStore = new CacheStore($memcachedCache);$cacheStore->put('site','http://LaravelAcademy.org');dd($cacheStore->get('site'));