PHP中使用Redis

首先要确保有Redis的服务

# redis-cli -vredis-cli 3.2.8

# redis-server -vRedis server v=3.2.8 sha=00000000:0 malloc=jemalloc-4.0.3 bits=64 build=e034df79550b120

然后确保PHP已经添加了Redis扩展

# php -m |grep redisredis

然后要创建Redis类

<?phpclass Red { ???static private $redis = NULL; ???private $_red = NULL; ???private $_return_data = NULL; ???static public function create() { ???????if(self::$redis) { ???????????return Red::$redis; ??????????} ???????????????self::$redis = new self; ???????return self::$redis; ???} ??????public function __call($func, $params) { ???????if ($func == 'multi') { ???????????$this->_return_data = $this->_red->multi($params[0]); ???????} else { ???????????$this->_return_data = call_user_func_array(array(&$this->_red, $func), $params); ???????} ??????????return $this->_return_data; ???} ??????private function __construct() { ???????$this->_red = new Redis(); ????????$this->_red->connect(C("REDIS_HOST"),C("REDIS_PORT")); ???????$this->_red->select(C('REDIS_DB') ?: 0); ???????return Red::$redis; ???} ??}

config.php中配置Redis

'REDIS_HOST' ???????????????=> ?'127.0.0.1','REDIS_PROT' ???????????????=> ?6379,

使用Redis，可以提高查询速度，一些不变的查询，可以保存到Redis中，进行快速查询。比如查询城市信息，保存到Redis中，不必每次都查看数据库。

// 获取区域数据public function get_map() { ???????vendor('Redis.Red'); ???????$redis = Red::create(); ???????$data = $redis->get('china:area'); ???????if (!$data) { ???????????$areaModel = M('china_area'); ???????????$p = $areaModel->field('id,name,level')->where(['level' => 1])->select(); ???????????foreach ($p as $k => $v) { ???????????????$c = $areaModel->field('id,name,level')->where(['level' => 2, 'upid' => $v['id']])->select(); ???????????????foreach ($c as $ck => $cv) { ???????????????????$p[$k]['child'][$ck] = $cv; ???????????????????$d = $areaModel->field('id,name,level')->where(['level' => 3, 'upid' => $cv['id']])->select(); ???????????????????foreach ($d as $dk => $dv) { ???????????????????????$p[$k]['child'][$ck]['child'][] = $dv; ???????????????????} ???????????????} ???????????} ???????????$redis->set('china:area', json_encode($p,JSON_UNESCAPED_UNICODE)); ???????} else { ???????????$p = json_decode($data, true); ???????} ???????$this->json->setAttr("data", $p); ???????$this->json->Send();}

第一次查询，用时

第二次查询，已经存入Redis

差距很明显吧！！！

Redis一个key或value值可以存储512M的数据，很强大了。

可以去redis中查看一下，

127.0.0.1:6379> keys china:area1) "china:area"

Redis 可以存储任意类型的数据，最好通过json加密进去吧。获取的时候，进行解密。

查看PHP扩展文档，https://github.com/phpredis/phpredis/

PHP中使用Redis

原文地址：https://www.cnblogs.com/jiqing9006/p/9092933.html