RedisClient，单例-PHP源码

set(&＃39;xxxxx&＃39;, &＃39;good&＃39;);
 * $ret = $redis->get(&＃39;xxxxx&＃39;);
 *
 */

class RedisCli {
	private static $_instance = array();
	private $_redis = false;
	
	/**
	 * 单例模型，构造函数
	 */
	public static function getInstance($conf_dir=&＃39;/xxx/redis.conf.php&＃39;, $serverName=&＃39;master&＃39;) {
		if (isset(self::$_instance[$serverName])) {
			return self::$_instance[$serverName];
		}
		require_once($conf_dir);
		if (!isset($redis_conf[$serverName])) {
			throw new Exception("param serverName Or redis config error...");
		}
		$cOnf= $redis_conf[$serverName];
		if (!class_exists(&＃39;Redis&＃39;)) {
			throw new Exception("Class Redis not exists, please install the php Redis extension...");
		}
		if (isset($conf[&＃39;host&＃39;]) && isset($conf[&＃39;port&＃39;]) && isset($conf[&＃39;passwd&＃39;]) && isset($conf[&＃39;timeout&＃39;])) {
			self::$_instance[$serverName] = new self($conf[&＃39;host&＃39;], $conf[&＃39;port&＃39;], $conf[&＃39;passwd&＃39;], $conf[&＃39;timeout&＃39;]);
			return self::$_instance[$serverName];
		}
		return false;
	}

	/**
	 *  私有, 单例模型，禁止外部构造
	 */
	private function __construct($host, $port, $passwd, $timeout) {
		$this->_redis = new Redis();
		if ($this->_redis->connect($host, $port, $timeout)) {
			if (!empty($passwd)) {
				$this->_redis->auth($passwd);
			}
		}
	}

	/**
	 *  私有, 单例模型，禁止克隆
	 */
	private function __clone() {
	}

    /**
	 *  公有，调用对象函数
	 */
	public function __call($method, $args) {
		if (!$this->_redis || !$method) {
			return false;
		}
		if (!method_exists($this->_redis, $method)) {
			throw new Exception("Class RedisCli not have method ($method) ");
		}
		return call_user_func_array(array($this->_redis, $method), $args);
	}
}

?>