redis简单单例

redis实例化单例类

class CacheRedis
{
    private static $_instance = null;

    private function __construct() {
    }

    /**
     * @param $server
     * @return null|\Redis
     */
    public static function getInstance($server) {
        if (is_null(self::$_instance)) {
            self::$_instance = new \Redis();
            list($host, $port) = explode(':', $server);
            self::$_instance->connect($host, $port);
        }
        return self::$_instance;
    }

    private function __clone() {
    }
}

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