Redis常用命令(一)

Redis::__construct
描述:
创建一个Redis客户端
范例:
$redis = new Redis();

connect, open
描述:
实例连接到一个Redis.
参数:host:
string        port: int
返回值:BOOL
成功返回:TRUE;失败返回:FALSE
范例:
$redis->connect(‘127.0.0.1′, 6379);


get
描述:
获取有关指定键的值
参数:key
返回值:string或BOLL
如果键不存在,则返回 FALSE。否则,与此相关的关键值返回。
范例:
$redis->get(‘key’);


set
描述:
设置关键值参数
参数:Key
Value
返回值:BOOL
范例:
$redis->set(‘key’, ‘value’)


setnx
描述:
如果在数据库中不存在该键,设置关键值参数
参数:key
value
返回值:BOOL
范例:
this>redis>setnx(key,value);/TRUE/this->redis->setnx(‘key’, ‘value’); /* 返回 FALSE */


delete
描述:
删除指定的键
参数:一个键,或不确定数目的参数,每一个关键的数组:key1
key2 key3 … keyN
返回值:删除的项数
范例:
redis>set(key1',val1');redis->set(‘key2′, ‘val2′);
redis>set(key3',val3');redis->set(‘key4′, ‘val4′);
redis>delete(key1',key2');/2/redis->delete(array(‘key3′, ‘key4′)); /* 返回 2 */


exists
描述:
验证指定的键是否存在
参数key
返回值:Bool
范例:
this>set(key,value);this->exists(‘key’); /* 返回TRUE
*/
$this->exists(‘NonExistingKey’); /* 返回FALSE */


incr
描述:
数字递增存储键值键.如果第二个参数被填满,它将被用来作为整数值递增
Increment
the number stored at key by one. If the second argument is filled, it will be
used as the integer value of the increment.
参数:key value:将被添加到键的值
返回值:INT
the new value
范例:
$redis->incr(‘key1′); /* key1 didn’t exists, set to 0
before the increment */
/* and now has the value 1 */


redis>incr(key1');/2/redis->incr(‘key1′); /* 3 */
$redis->incr(‘key1′); /* 4 */


decr
描述:
数字递减存储键值。如果第二个参数被填满,它将被用来作为整数值递减
Decrement
the number stored at key by one. If the second argument is filled, it will be
used as the integer value of the decrement.
参数:key value:将被添加到键的值
返回值:INT
the new value
范例:
redis>decr(key1');/key1didntexists,setto0beforetheincrement//andnowhasthevalue1/redis->decr(‘key1′); /* -2 */
$redis->decr(‘key1′); /* -3 */


getMultiple
描述:
取得所有指定键的值。如果一个或多个键不存在,该数组中该键的值为假
参数:其中包含键值的列表数组
返回值:返回包含所有键的值的数组
范例:
redis>set(key1',value1');redis->set(‘key2′, ‘value2′);
redis>set(key3',value3');redis->getMultiple(array(‘key1′, ‘key2′, ‘key3′)); /*
array(‘value1′, ‘value2′, ‘value3′);
$redis->getMultiple(array(‘key0′,
‘key1′, ‘key5′)); /* array(`FALSE`, ‘value2′, `FALSE`);


lPush
描述:
由列表尾部添加字符串值。如果不存在该键则创建该列表。如果该键存在,而且不是一个列表,返回FALSE。
参数:key,value
返回值:LONG
The new length of the list in case of success, FALSE in case of
Failure.
范例:
redis>delete(key1');redis->lPush(‘key1′, ‘C’);
// returns 1
redis>lPush(key1',B);//returns2redis->lPush(‘key1′, ‘A’); // returns 3
/* key1 now points to the
following list: [ 'A', 'B', 'C' ] */


rPush
描述:
由列表头部添加字符串值。如果不存在该键则创建该列表。如果该键存在,而且不是一个列表,返回FALSE。
参数:key,value
返回值:LONG
The new length of the list in case of success, FALSE in case of
Failure.
范例:
redis>delete(key1');redis->lPush(‘key1′, ‘C’);
// returns 1
redis>lPush(key1',B);//returns2redis->lPush(‘key1′, ‘A’); // returns 3
/* key1 now points to the
following list: [ 'A', 'B', 'C' ] */


lPop
描述:
返回和移除列表的最后一个元素
参数:key
返回值:STRING
if command executed successfully BOOL FALSE in case of failure (empty
list)
范例:
redis>rPush(key1',A);redis->rPush(‘key1′,
‘B’);
redis>rPush(key1',C);/key1=>[C,B,A]/redis->lPop(‘key1′); /* key1 => [ 'B', 'A' ] */


rPop
描述:
返回和移除列表的第一个元素
参数:key
返回值:STRING
if command executed successfully BOOL FALSE in case of failure (empty
list)
范例:
redis>rPush(key1',A);redis->rPush(‘key1′,
‘B’);
redis>rPush(key1',C);/key1=>[C,B,A]/redis->rPop(‘key1′); /* key1 => [ 'C', 'B' ] */


lSize
描述:
返回的列表的大小。如果列表不存在或为空,该命令返回0。如果该键不是列表,该命令返回FALSE。
参数:Key
返回值:
LONG
The size of the list identified by Key exists.
BOOL FALSE if the data type
identified by Key is not list
范例:
redis>rPush(key1',A);redis->rPush(‘key1′, ‘B’);
redis>rPush(key1',C);/key1=>[C,B,A]/redis->lSize(‘key1′);/* 3
*/
redis>rPop(key1');redis->lSize(‘key1′);/* 2 */


lGet
描述:
返回指定键存储在列表中指定的元素。 0第一个元素,1第二个…
-1最后一个元素,-2的倒数第二…错误的索引或键不指向列表则返回FALSE。
参数:key index
返回值:
String the
element at this index
Bool FALSE if the key identifies a non-string data
type, or no value corresponds to this index in the list
Key.
范例:
redis>rPush(key1',A);redis->rPush(‘key1′,
‘B’);
redis>rPush(key1',C);/key1=>[A,B,C]/redis->lGet(‘key1′, 0); /* ‘A’ */
redis>lGet(key1',1);/C/redis->lGet(‘key1′, 10); /* `FALSE` */


lSet
描述:
为列表指定的索引赋新的值.
参数:key index
value
返回值:BOOL TRUE if the new value is setted. FALSE if the index is out of
range, or data type identified by key is not a
list.
范例:
redis>rPush(key1',A);redis->rPush(‘key1′,
‘B’);
redis>rPush(key1',C);/key1=>[A,B,C]/redis->lGet(‘key1′, 0); /* ‘A’ */
redis>lSet(key1',0,X);redis->lGet(‘key1′, 0); /* ‘X’ */


lGetRange
描述:
返回在该区域中的指定键列表中开始到结束存储的指定元素,lGetRange(key,
start, end)。0第一个元素,1第二个元素… -1最后一个元素,-2的倒数第二…
参数:key start
end
返回值:
Array containing the values in specified
range.
范例:
redis>rPush(key1',A);redis->rPush(‘key1′,
‘B’);
redis>rPush(key1',C);redis->lGetRange(‘key1′, 0, -1);
/* array(‘A’, ‘B’, ‘C’)
*/
lRemove
描述:
从列表中从头部开始移除count个匹配的值。如果count为零,所有匹配的元素都被删除。如果count是负数,内容从尾部开始删除。
参数:key
count value
返回值:
LONG the number of elements to remove
BOOL FALSE if
the value identified by key is not a list.
范例:
redis>lPush(key1',A);redis->lPush(‘key1′, ‘B’);
redis>lPush(key1',C);redis->lPush(‘key1′, ‘A’);
redis>lPush(key1',A);redis->lGetRange(‘key1′, 0, -1); /* array(‘A’, ‘A’, ‘C’, ‘B’, ‘A’)
*/
redis>lRemove(key1',A,2);/2/redis->lGetRange(‘key1′, 0, -1); /* array(‘C’, ‘B’, ‘A’) */


sAdd
描述:
为一个Key添加一个值。如果这个值已经在这个Key中,则返回FALSE。
参数:key
value
返回值:
BOOL TRUE if value didn’t exist and was added successfully,
FALSE if the value is already present.
范例:
redis>sAdd(key1',set1');/TRUE,key1'=>set1'/redis->sAdd(‘key1′ , ’set2′);
/* TRUE, ‘key1′ => {’set1′, ’set2′}*/
$redis->sAdd(‘key1′ , ’set2′); /*
FALSE, ‘key1′ => {’set1′, ’set2′}*/


sRemove
描述:
删除Key中指定的value值
参数:key
member
返回值:BOOL TRUE if the member was present in the set, FALSE if it
didn’t.
范例:
redis>sAdd(key1',set1');redis->sAdd(‘key1′ ,
’set2′);
redis>sAdd(key1',set3');/key1'=>set1',set2',set3'/redis->sRemove(‘key1′, ’set2′); /* ‘key1′ => {’set1′,
’set3′} */


sMove
描述:
将Key1中的value移动到Key2中
参数:srcKey
dstKey member
返回值:BOOL If the operation is successful, return TRUE. If the
srcKey and/or dstKey didn’t exist, and/or the member didn’t exist in srcKey,
FALSE is returned.
范例:
redis>sAdd(key1',set11');redis->sAdd(‘key1′ , ’set12′);
redis>sAdd(key1',set13');/key1'=>set11',set12',set13'/redis->sAdd(‘key2′ , ’set21′);
redis>sAdd(key2',set22');/key2'=>set21',set22'/redis->sMove(‘key1′,
‘key2′, ’set13′); /* ‘key1′ => {’set11′, ’set12′} */
/* ‘key2′ =>
{’set21′, ’set22′, ’set13′} */


sContains
描述:
检查集合中是否存在指定的值。
参数:key
value
返回值:BOOL TRUE if value is a member of the set at key key, FALSE
otherwise.
范例:
redis>sAdd(key1',set1');redis->sAdd(‘key1′
, ’set2′);
redis>sAdd(key1',set3');/key1'=>set1',set2',set3'/redis->sContains(‘key1′, ’set1′); /* TRUE
*/
$redis->sContains(‘key1′, ’setX’); /* FALSE */


sSize
描述:
返回集合中存储值的数量
参数:key
返回值:LONG
the cardinality of the set identified by key, 0 if the set doesn’t
exist.
范例:
redis>sAdd(key1',set1');redis->sAdd(‘key1′ ,
’set2′);
redis>sAdd(key1',set3');/key1'=>set1',set2',set3'/redis->sSize(‘key1′); /* 3 */
$redis->sSize(‘keyX’); /* 0
*/


sPop
描述:
随机移除并返回key中的一个值
参数:key
返回值:String
“popped” value        Bool FALSE if set identified by key is empty or doesn’t
exist.
范例:
redis>sAdd(key1',set1');redis->sAdd(‘key1′ ,
’set2′);
redis>sAdd(key1',set3');/key1'=>set3',set1',set2'/redis->sPop(‘key1′); /* ’set1′, ‘key1′ => {’set3′, ’set2′}
*/
$redis->sPop(‘key1′); /* ’set3′, ‘key1′ => {’set2′} */


sInter
描述:
返回一个所有指定键的交集。如果只指定一个键,那么这个命令生成这个集合的成员。如果不存在某个键,则返回FALSE。
参数:key1,
key2, keyN: keys identifying the different sets on which we will apply the
intersection.
返回值:Array, contain the result of the intersection between those
keys. If the intersection beteen the different sets is empty, the return value
will be empty array.
范例:
redis>sAdd(key1',val1');redis->sAdd(‘key1′, ‘val2′);
redis>sAdd(key1',val3');redis->sAdd(‘key1′, ‘val4′);
redis>sAdd(key2',val3');redis->sAdd(‘key2′, ‘val4′);
redis>sAdd(key3',val3');redis->sAdd(‘key3′,
‘val4′);
var_dump($redis->sInter(‘key1′, ‘key2′,
‘key3′));
输出:
array(2) {[0]=>string(4) “val4″ [1]=>string(4)
“val3″}


sInterStore
描述:
执行sInter命令并把结果储存到新建的变量中。
参数:
Key:
dstkey, the key to store the diff into.
Keys: key1, key2… keyN. key1..keyN
are intersected as in sInter.
返回值:INTEGER: The cardinality of the resulting
set, or FALSE in case of a missing key.
范例:
redis>sAdd(key1',val1');redis->sAdd(‘key1′, ‘val2′);
redis>sAdd(key1',val3');redis->sAdd(‘key1′, ‘val4′);
redis>sAdd(key2',val3');redis->sAdd(‘key2′, ‘val4′);
redis>sAdd(key3',val3');redis->sAdd(‘key3′,
‘val4′);
var_dump(redis>sInterStore(output,key1',key2',key3'));vardump(redis->sMembers(‘output’));
输出:
int(2)
array(2)
{
[0]=>
string(4) “val4″
[1]=>
string(4) “val3″
}


sUnion
描述:
返回一个所有指定键的并集
参数:
Keys: key1,
key2, … , keyN: Any number of keys corresponding to sets in
redis.
返回值:
Array of strings: The union of all these
sets.
范例:
redis>delete(s0',s1',s2');redis->sAdd(’s0′,
‘1′);
redis>sAdd(s0',2');redis->sAdd(’s1′,
‘3′);
redis>sAdd(s1',1');redis->sAdd(’s2′,
‘3′);
redis>sAdd(s2',4');vardump(redis->sUnion(’s0′, ’s1′,
’s2′));
输出:
array(4) {
[0]=>
string(1)
“3″
[1]=>
string(1) “4″
[2]=>
string(1)
“1″
[3]=>
string(1) “2″
}


sUnionStore
描述:
执行sUnion命令并把结果储存到新建的变量中。
参数:
Key:
dstkey, the key to store the diff into.
Keys: key1, key2, … , keyN: Any
number of keys corresponding to sets in redis.
返回值:
INTEGER: The
cardinality of the resulting set, or FALSE in case of a missing
key.
范例:
redis>delete(s0',s1',s2');redis->sAdd(’s0′,
‘1′);
redis>sAdd(s0',2');redis->sAdd(’s1′,
‘3′);
redis>sAdd(s1',1');redis->sAdd(’s2′,
‘3′);
redis>sAdd(s2',4');vardump(redis->sUnionStore(‘dst’,
’s0′, ’s1′,
’s2′));
var_dump($redis->sMembers(‘dst’));
输出:
int(4)
array(4)
{
[0]=>
string(1) “3″
[1]=>
string(1)
“4″
[2]=>
string(1) “1″
[3]=>
string(1) “2″
}


sDiff
描述:
返回第一个集合中存在并在其他所有集合中不存在的结果
参数:Keys:
key1, key2, … , keyN: Any number of keys corresponding to sets in
redis.
返回值:Array of strings: The difference of the first set will all the
others.
范例:
redis>delete(s0',s1',s2');redis->sAdd(’s0′,
‘1′);
redis>sAdd(s0',2');redis->sAdd(’s0′,
‘3′);
redis>sAdd(s0',4');redis->sAdd(’s1′,
‘1′);
redis>sAdd(s2',3');vardump(redis->sDiff(’s0′, ’s1′,
’s2′));
array(2) {
[0]=>
string(1) “4″
[1]=>
string(1)
“2″
}


sDiffStore
描述:
执行sDiff命令并把结果储存到新建的变量中。
参数:
Key:
dstkey, the key to store the diff into.
Keys: key1, key2, … , keyN: Any
number of keys corresponding to sets in redis
返回值:INTEGER: The cardinality of
the resulting set, or FALSE in case of a missing
key.
范例:
redis>delete(s0',s1',s2');redis->sAdd(’s0′,
‘1′);
redis>sAdd(s0',2');redis->sAdd(’s0′,
‘3′);
redis>sAdd(s0',4');redis->sAdd(’s1′,
‘1′);
redis>sAdd(s2',3');vardump(redis->sDiffStore(‘dst’,
’s0′, ’s1′, ’s2′));
var_dump($redis->sMembers(‘dst’));
Return value:
the number of elements of s0 that are neither in s1 nor in
s2.
int(2)
array(2) {
[0]=>
string(1)
“4″
[1]=>
string(1) “2″
}


sMembers, sGetMembers
描述:
返回集合的内容
参数:Key:
key
返回值:An array of elements, the contents of the
set.
范例:
redis>delete(s);redis->sAdd(’s’,
‘a’);
redis>sAdd(s,b);redis->sAdd(’s’,
‘a’);
redis>sAdd(s,c);vardump(redis->sMembers(’s’));
Output:
array(3)
{
[0]=>
string(1) “c”
[1]=>
string(1)
“a”
[2]=>
string(1) “b”
}


getSet
描述:
返回当前的Key的值,并修改Key为新的值。
参数:
Key:
key
STRING: value
返回值:
A string, the previous value located at this
key.
范例:
redis>set(x,42');exValue = redis>getSet(x,lol);//return42',replacesxbylolnewValue = $redis->get(‘x’)’
// return ‘lol’

posted @ 2015-06-16 16:16  孤独青鸟  阅读(358)  评论(0编辑  收藏  举报