Redis多库选择单例类

来源：互联网发布：java 教程哪个好编辑：程序博客网时间：2024/05/01 13:58

前言

qq群里有同学问redis如何进行多库选择,用php实现了一下,还望各位多多指点

代码

<?phpclass MultiRedisConnect{    /**     * hostname     *     * @var string     */    const REDISHOSTNAME = "127.0.0.1";    /**     * port     *     * @var int     */    const REDISPORT = 6379;    /**     * timeout     *     * @var int     */    const REDISTIMEOUT = 0;    /**     * password     *     * @var string     */    const REDISPASSWORD = "123456";    /**     * 类单例数组     *     * @var array     */    private static $instance = array();    /**     * redis连接句柄     *     * @var object     */    private $redis;    /**     * hash的key     *     * @var int     */    private $hash;    /**     * 私有化构造函数,防止类外实例化     *     * @param int $dbnumber                 */    private function __construct ($dbnumber)    {        $dbnumber = (int) $dbnumber;        $this->hash = $dbnumber;        $this->redis = new Redis();        $this->redis->connect(self::REDISHOSTNAME, self::REDISPORT, self::REDISTIMEOUT);        $this->redis->auth(self::REDISPASSWORD);        $this->redis->select($dbnumber);    }    private function __clone ()    {}    /**     * 获取类单例     *     * @param int $dbnumber                 * @return object     */    public static function getRedisInstance ($dbnumber)    {        $hash = (int) $dbnumber;                if (! isset(self::$instance[$hash])) {            self::$instance[$hash] = new MultiRedisConnect($dbnumber);        }                return self::$instance[$hash];    }    /**     * 获取redis的连接实例     *     * @return object     */    public function getRedisConnect ()    {        return $this->redis;    }    /**     * 关闭单例时做清理工作     */    public function __destruct ()    {        $key = $this->hash;        self::$instances[$key]->redis->close();        self::$instances[$key] = null;    }}?>