## bitcount
##### *Description*
Count bits in a string.
##### *Parameters*
*key*
##### *Return value*
*LONG*: The number of bits set to 1 in the value behind the input key.
- php-redis中文帮助手册
- 系统及通用函数
- construct
- connect,open
- pconnect, popen
- close
- setOption
- getOption
- ping
- echo
- randomKey
- select
- move
- rename, renameKey
- renameNx
- setTimeout,expire,pexpire
- expireAt,pexpireAt
- keys,getKeys
- dbSize
- auth
- bgrewriteaof
- slaveof
- object
- save
- bgsave
- lastSave
- type
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- String数据类型函数
- get
- set
- setex, psetex
- setnx
- del, delete
- getSet
- multi, exec, discard
- watch, unwatch
- subscribe
- publish
- exists
- incr, incrBy
- incrByFloat
- decr, decrBy
- mGet, getMultiple
- append
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- setRange
- strlen
- getBit
- setBit
- bitop
- bitcount
- mset, msetnx
- List数据类型相关函数
- lPush
- rPush
- lPushx
- rPushx
- lPop
- rPop
- blPop, brPop
- lSize
- lIndex, lGet
- lSet
- IRange,IGetRange
- lTrim,listTrim
- lRem,lRemove
- lInsert
- rpoplpush
- brpoplpush
- Set数据类型相关函数
- sAdd
- sRem, sRemove
- sMove
- sIsMember, sContains
- sCard, sSize
- sPop
- sRandMember
- sInter
- sInterStore
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- sUnionStore
- sDiff
- sDiffStore
- sMembers, sGetMembers
- zSet数据类型相关函数
- zAdd
- zRange
- zDelete,zRem
- zRevRange
- zRangeByScore, zRevRangeByScore
- zCount
- zRemRangeByScore,zDeleteRangeByScore
- zRemByRank,zDeleteRangeByRank
- zSize,zCard
- zScore
- zRank,zRevRank
- zIncrBy
- zUnion
- zInter
- Hash数据类型相关函数
- hSet
- hSetNx
- hGet
- hLen
- hDel
- hKeys
- hVals
- hGetAll
- hExists
- hIncrBy
- hIncrByFloat
- hMset
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