• 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’

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  • 原文地址:https://www.cnblogs.com/wuxiang/p/4581117.html
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