This article is excerpted for the purpose of collecting classics. Hope to share common opinions together.
class RedisCluster{
// Whether to use the M/S read-write cluster solution
private <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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The above introduces a complete example of the PHPRedis encapsulation class, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.

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