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Complete example of PHPRedis encapsulation class

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class RedisCluster{
// Whether to use the M/S read-write cluster solution
private isUseClu ster =false;//S lave ... priva te_sn = 0; // Server connection handle private $_linkHandle = array( ‘master’=>null,//Only supports one Master ‘slave’=>array(),//There can be multiple Slave );

<code>/**
 * 构造函数
 * @param boolean $isUseCluster 是否采用 M/S 方案
 */
public function __construct($isUseCluster=false){
    $this->_isUseCluster = $isUseCluster;
}
/**
 * 连接服务器,注意:这里使用长连接,提高效率,但不会自动关闭
 *
 * @param array $config Redis服务器配置
 * @param boolean $isMaster 当前添加的服务器是否为 Master 服务器
 * @return boolean
 */
public function connect($c $isMaster=true){
    // default port
    if(!isset($config['port'])){
        $config['port'] = 6379;
    }
    // 设置 Master 连接
    if($isMaster){
        $this->_linkHandle['master'] = new Redis();
        $ret = $this->_linkHandle['master']->pconnect($config['host'],$config['port']);
    }else{
        // 多个 Slave 连接
        $this->_linkHandle['slave'][$this->_sn] = new Redis();
        $ret = $this->_linkHandle['slave'][$this->_sn]->pconnect($config['host'],$config['port']);
        ++$this->_sn;
    }
    return $ret;
}
/**
 * 关闭连接
 *
 * @param int $flag 关闭选择 0:关闭 Master 1:关闭 Slave 2:关闭所有
 * @return boolean
 */
public function close($flag=2){
    switch($flag){
        // 关闭 Master
        case 0:
            $this->getRedis()->close();
            break;
        // 关闭 Slave
        case 1:
            for($i=0; $i_sn; ++$i){
                $this->_linkHandle['slave'][$i]->close();
            }
            break;
        // 关闭所有
        case 1:
            $this->getRedis()->close();
            for($i=0; $i_sn; ++$i){
                $this->_linkHandle['slave'][$i]->close();
            }
            break;
    }
    return true;
}
/**
 * 得到 Redis 原始对象可以有更多的操作
 *
 * @param boolean $isMaster 返回服务器的类型 true:返回Master false:返回Slave
 * @param boolean $slaveOne 返回的Slave选择 true:负载均衡随机返回一个Slave选择 false:返回所有的Slave选择
 * @return redis object
 */
public function getRedis($isMaster=true,$slave
    // 只返回 Master
    if($isMaster){
        return $this->_linkHandle['master'];
    }else{
        return $slaveOne ? $this->_getSlaveRedis() : $this->_linkHandle['slave'];
    }
}
/**
 * 写缓存
 *
 * @param string $key 组存KEY
 * @param string $value 缓存值
 * @param int $expire 过期时间, 0:表示无过期时间
 */
public function set($key, $value, $expire=0){
    // 永不超时
    if($expire == 0){
        $ret = $this->getRedis()->set($key, $value);
    }else{
        $ret = $this->getRedis()->setex($key, $expire, $value);
    }
    return $ret;
}
/**
 * 读缓存
 *
 * @param string $key 缓存KEY,支持一次取多个 $key = array('key1','key2')
 * @return string || boolean 失败返回 false, 成功返回字符串
 */
public function get($key){
    // 是否一次取多个值
    $func = is_array($key) ? 'mGet' : 'get';
    // 没有使用M/S
    if(! $this->_isUseCluster){
        return $this->getRedis()->{$func}($key);
    }
    // 使用了 M/S
    return $this->_getSlaveRedis()->{$func}($key);
}
/**
 * 条件形式设置缓存,如果 key 不存时就设置,存在时设置失败
 *
 * @param string $key 缓存KEY
 * @param string $value 缓存值
 * @return boolean
 */
public function setnx($key, $value){
    return $this->getRedis()->setnx($key, $value);
}
/**
 * 删除缓存
 *
 * @param string || array $key 缓存KEY,支持单个健:"key1" 或多个健:array('key1','key2')
 * @return int 删除的健的数量
 */
public function remove($key){
    // $key => "key1" || array('key1','key2')
    return $this->getRedis()->delete($key);
}
/**
 * 值加加操作,类似 ++$i ,如果 key 不存在时自动设置为 0 后进行加加操作
 *
 * @param string $key 缓存KEY
 * @param int $default 操作时的默认值
 * @return int 操作后的值
 */
public function incr($key,$default=1){
    if($default == 1){
        return $this->getRedis()->incr($key);
    }else{
        return $this->getRedis()->incrBy($key, $default);
    }
}
/**
 * 值减减操作,类似 --$i ,如果 key 不存在时自动设置为 0 后进行减减操作
 *
 * @param string $key 缓存KEY
 * @param int $default 操作时的默认值
 * @return int 操作后的值
 */
public function decr($key,$default=1){
    if($default == 1){
        return $this->getRedis()->decr($key);
    }else{
        return $this->getRedis()->decrBy($key, $default);
    }
}
/**
 * 添空当前数据库
 *
 * @return boolean
 */
public function clear(){
    return $this->getRedis()->flushDB();
}
/* =================== 以下私有方法 =================== */
/**
 * 随机 HASH 得到 Redis Slave 服务器句柄
 *
 * @return redis object
 */
private function _getSlaveRedis(){
    // 就一台 Slave 机直接返回
    if($this->_sn _linkHandle['slave'][0];
    }
    // 随机 Hash 得到 Slave 的句柄
    $hash = $this->_hashId(mt_rand(), $this->_sn);
    return $this->_linkHandle['slave'][$hash];
}
/**
 * 根据ID得到 hash 后 0~m-1 之间的值
 *
 * @param string $id
 * @param int $m
 * @return int
 */
private function _hashId($id,$m=10)
{
    //把字符串K转换为 0~m-1 之间的一个值作为对应记录的散列地址
    $k = md5($id);
    $l = strlen($k);
    $b = bin2hex($k);
    $h = 0;
    for($i=0;$igetRedis()->lpush($key,$value);
}
/**
 *  add lpop
 */
public function lpop($key){
    return $this->getRedis()->lpop($key);
}
/**
 * lrange
 */
public function lrange($key,$start,$end){
    return $this->getRedis()->lrange($key,$start,$end);
}
/**
 *  set hash opeation
 */
public function hset($name,$key,$value){
    if(is_array($value)){
        return $this->getRedis()->hset($name,$key,serialize($value));
    }
    return $this->getRedis()->hset($name,$key,$value);
}
/**
 *  get hash opeation
 */
public function hget($name,$key = null,$serialize=true){
    if($key){
        $row = $this->getRedis()->hget($name,$key);
        if($row && $serialize){
            unserialize($row);
        }
        return $row;
    }
    return $this->getRedis()->hgetAll($name);
}
/**
 *  delete hash opeation
 */
public function hdel($name,$key = null){
    if($key){
        return $this->getRedis()->hdel($name,$key);
    }
    return $this->getRedis()->hdel($name);
}
/**
 * Transaction start
 */
public function multi(){
    return $this->getRedis()->multi();
}
/**
 * Transaction send
 */
public function exec(){
    return $this->getRedis()->exec();
}
</code>
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