laravel自定义缓存memcache（自带memcached，windows不支持）

1、首先弄清楚memcache和memcached的区别（自行搜索）

2、安装memcache服务端（参照https://www.cnblogs.com/winstonsias/p/10190745.html）及php扩展（参照https://www.cnblogs.com/winstonsias/p/10193781.html）

3、添加服务提供类 MemcacheServiceProvider ，记得在app.php配置文件添加提供者注册

  namespace AppProviders;

    use Cache;
    use AppExtensionsMemcacheStore;
    use IlluminateSupportServiceProvider;

    class MemcacheServiceProvider extends ServiceProvider
    {
        public function boot()
        {
            Cache::extend('memcache', function ($app) {
                return Cache::repository(new MemcacheStore($app['memcache.connector']));
            });
        }

        public function register()
        {
            //注册memcache连接的单例
            $this->app->singleton('memcache.connector', function ($app) {
                $config = $app['config']["cache.stores.memcache"];
                $servers = $config['servers'][0];
                return memcache_connect($servers['host'], $servers['port']);
            });
        }


    }

4、完善存储类MemcacheStore（可在app添加Extensions文件夹存放）

 namespace AppExtensions;
    class MemcacheStore implements IlluminateContractsCacheStore
    {
        //memcache资源
        protected $memcache_conn;
        public  function __construct($conn)
        {
            $this->memcache_conn=$conn;
        }

        public function __destruct()
        {
            // TODO: Implement __destruct() method.
            $this->memcache_conn=null;//释放资源
        }

        public function get($key)
        {
            return $this->memcache_conn->get($key);
        }

        public function put($key, $value, $minutes)
        {
        }

        public function increment($key, $value = 1)
        {
        }

        public function decrement($key, $value = 1)
        {
        }

        public function forever($key, $value)
        {
        }

        public function forget($key)
        {
        }

        public function flush()
        {
        }

        public function getPrefix()
        {
        }

        /**
         * 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)
        {
            // TODO: Implement many() method.
        }

        /**
         * 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)
        {
            // TODO: Implement putMany() method.
        }
    }

5、在cache.php配置文件中添加自定义缓存store

 /**
         * 自定义memcache，不用memcached by winston
         */
        'memcache' => [
            'driver' => 'memcache',
            'servers' => [
                [
                    'host' => env('MEMCACHED_HOST', 'xx.xx.xx.xx'),
                    'port' => env('MEMCACHED_PORT', 11211),
                    'weight' => 100,
                ],
            ],
        ],

6、在控制器中使用

 $val=Cache::store('memcache')->get('xxxx');