越简单越好!

Redis常用命令

bevin 发表于 2011-07-21 10:27 | 3041次阅读 1次推荐   Redis

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’); /* 返回 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′); /* 返回 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′); /* key1 didn’t exists, set to 0 before the increment */
/* and now has the value -1 */
$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’); // returns 2
$redis->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’); // returns 2
$redis->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′));
var_dump($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′);
$redis->sAdd(’s2′, ‘4′);
var_dump($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′);
$redis->sAdd(’s2′, ‘4′);
var_dump($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′);
$redis->sAdd(’s2′, ‘3′);
var_dump($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′);
$redis->sAdd(’s2′, ‘3′);
var_dump($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’);
$redis->sAdd(’s’, ‘c’);
var_dump($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’); // return ‘42′, replaces x by ‘lol’
$newValue = $redis->get(‘x’)’ // return ‘lol’


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