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Understand several common methods for operating redis in PHP

青灯夜游
青灯夜游forward
2020-07-16 16:05:361806browse

This article will share with you some common methods for operating redis in PHP. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

Understand several common methods for operating redis in PHP

1, connect

Description: The instance is connected to a Redis.

Parameters: host : string, port: int

Return value: BOOL Successful return: TRUE; Failure return: FALSE

Example:

<?php
$redis = new redis();
$result = $redis->connect(&#39;127.0.0.1&#39;, 6379);
var_dump($result); //结果:bool(true)
?>

Value operation:

2, set

Description: Set the value of key and value

Parameter: Key Value

Return value: BOOL Successful return: TRUE; Failure return: FALSE

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$result = $redis->set(&#39;test&#39;,"11111111111");
var_dump($result); //结果:bool(true)
?>

3, get

Description: Get information about the specified key Value

Parameter: key

Return value: string or BOOL If the key does not exist, it returns FALSE. Otherwise, return the value corresponding to the specified key.

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$result = $redis->get(&#39;test&#39;);
var_dump($result); //结果:string(11) "11111111111"
?>

4,delete

Description: Delete the specified key

Parameters: a key, or undefined Number of parameters, array for each key: key1 key2 key3 ... keyN

Return value: Number of items deleted

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->set(&#39;test&#39;,"1111111111111");
echo $redis->get(&#39;test&#39;); //结果:1111111111111
$redis->delete(&#39;test&#39;);
var_dump($redis->get(&#39;test&#39;)); //结果:bool(false)
?>

5,setnx

Description: If it does not exist, set it. If it exists, do not change it.

Parameter: key value

Return value: BOOL Successful return: TRUE; Failure Return: FALSE

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->set(&#39;test&#39;,"1111111111111");
$redis->setnx(&#39;test&#39;,"22222222");
echo $redis->get(&#39;test&#39;); //结果:1111111111111
$redis->delete(&#39;test&#39;);
$redis->setnx(&#39;test&#39;,"22222222");
echo $redis->get(&#39;test&#39;); //结果:22222222
?>

6, exists

Description: Verify whether the specified key exists

Parameter key

Return value: Bool Successful return: TRUE; Failure return: FALSE

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->set(&#39;test&#39;,"1111111111111");
var_dump($redis->exists(&#39;test&#39;)); //结果:bool(true)
?>

7, incr

Description: Numeric increment stores key value key.

Parameters: key value: The value that will be added to the key

Return value: INT the new value

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->set(&#39;test&#39;,"123");
var_dump($redis->incr("test")); //结果:int(124)
var_dump($redis->incr("test")); //结果:int(125)
?>

8, decr

Description: Store the key value numerically in descending order.

Parameters: key value: the value that will be added to the key

Return value: INT the new value

Instance:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->set(&#39;test&#39;,"123");
var_dump($redis->decr("test")); //结果:int(122)
var_dump($redis->decr("test")); //结果:int(121)
?>

9 , getMultiple

Description: Get the values ​​of all specified keys. If one or more keys do not exist, the value of the key in the array is false, [the collection cannot be operated, otherwise it is false]

Parameters: a list array containing the key values

Return value: Returns an array containing the values ​​of all keys

Instance:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->set(&#39;test1&#39;,"1");
$redis->set(&#39;test2&#39;,"2");
$result = $redis->getMultiple(array(&#39;test1&#39;,&#39;test2&#39;));
print_r($result); //结果:Array ( [0] => 1 [1] => 2 )
?>

List operation:

10. lpush

Description: Add a string value from the head of the list. Create the list if the key does not exist. If the key exists and is not a list, return FALSE.

Parameters: key, value

Return value: Return the array length on success, false on failure

Instance:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
var_dump($redis->lpush("test","111")); //结果:int(1)
var_dump($redis->lpush("test","222")); //结果:int(2)
?>

11, rpush

Description: Add a string value from the end of the list. Create the list if the key does not exist. If the key exists and is not a list, return FALSE.

Parameters: key, value

Return value: Return the array length on success, false on failure

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
var_dump($redis->lpush("test","111")); //结果:int(1)
var_dump($redis->lpush("test","222")); //结果:int(2)
var_dump($redis->rpush("test","333")); //结果:int(3)
var_dump($redis->rpush("test","444")); //结果:int(4)
?>

12,lpop

Description: Returns and removes the first element of the list

Parameters: key

Return value: Returns the value of the first element successfully, returns false# on failure

##Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->lpush("test","111");
$redis->lpush("test","222");
$redis->rpush("test","333");
$redis->rpush("test","444");
var_dump($redis->lpop("test")); //结果:string(3) "222"
?>

13,lsize,llen

Description: The length of the returned list. If the list does not exist or is empty, the command returns 0. If the key is not a list, this command returns FALSE.

Parameters: Key

Return value: Return the array length on success, false on failure

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->lpush("test","111");
$redis->lpush("test","222");
$redis->rpush("test","333");
$redis->rpush("test","444");
var_dump($redis->lsize("test")); //结果:int(4)
?>

14, lget

Description: Returns the element with the specified key stored at the specified index in the list. 0 first element, 1 second... -1 last element, -2 second last... Returns FALSE if the wrong index or key does not point to the list.

Parameters: key index

Return value: Return the value of the specified element if successful, false if failed

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->lpush("test","111");
$redis->lpush("test","222");
$redis->rpush("test","333");
$redis->rpush("test","444");
var_dump($redis->lget("test",3)); //结果:string(3) "444"
?>

15,lset

Description: Assign a new value to the index specified in the list. If the index does not exist, return false.

Parameter: key index value

Return value: Return successfully true, failed false

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->lpush("test","111");
$redis->lpush("test","222");
var_dump($redis->lget("test",1)); //结果:string(3) "111"
var_dump($redis->lset("test",1,"333")); //结果:bool(true)
var_dump($redis->lget("test",1)); //结果:string(3) "333"
?>

16, lgetrange

Description:

Returns the specified key in the range Specified elements stored from start to end in the list [can print the entire list], lGetRange(key, start, end). 0 the first element, 1 the second element... -1 the last element, -2 the penultimate element...

Parameters: key start end

Return value: Successfully returns the value found , failed false

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->lpush("test","111");
$redis->lpush("test","222");
print_r($redis->lgetrange("test",0,-1)); //结果:Array ( [0] => 222 [1] => 111 )
?>

17,lremove

Description: Remove count matching values ​​from the list starting from the head. If count is zero, all matching elements are removed. If count is negative, the content is deleted from the end.

Parameter: key count value

Return value: Return the number of deleted items if successful, false if failed

Example:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->lpush(&#39;test&#39;,&#39;a&#39;);
$redis->lpush(&#39;test&#39;,&#39;b&#39;);
$redis->lpush(&#39;test&#39;,&#39;c&#39;);
$redis->rpush(&#39;test&#39;,&#39;a&#39;);
print_r($redis->lgetrange(&#39;test&#39;, 0, -1)); //结果:Array ( [0] => c [1] => b [2] => a [3] => a )
var_dump($redis->lremove(&#39;test&#39;,&#39;a&#39;,2)); //结果:int(2)
print_r($redis->lgetrange(&#39;test&#39;, 0, -1)); //结果:Array ( [0] => c [1] => b )
?>

Collection operation:

18, 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:成功返回true,失败false

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
var_dump($redis->sadd(&#39;test&#39;,&#39;111&#39;)); //结果:bool(true)
var_dump($redis->sadd(&#39;test&#39;,&#39;333&#39;)); //结果:bool(true)
print_r($redis->sort(&#39;test&#39;)); //结果:Array ( [0] => 111 [1] => 333 )
?>

19,sremove

描述:删除Key中指定的value值

参数:key member

返回值:true or false

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd(&#39;test&#39;,&#39;111&#39;);
$redis->sadd(&#39;test&#39;,&#39;333&#39;);
$redis->sremove(&#39;test&#39;,&#39;111&#39;);
print_r($redis->sort(&#39;test&#39;)); //结果:Array ( [0] => 333 )
?>

20,smove

描述:将Key1中的value移动到Key2中

参数:srcKey dstKey member

返回值:true or false

范例

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->delete(&#39;test1&#39;);
$redis->sadd(&#39;test&#39;,&#39;111&#39;);
$redis->sadd(&#39;test&#39;,&#39;333&#39;);
$redis->sadd(&#39;test1&#39;,&#39;222&#39;);
$redis->sadd(&#39;test1&#39;,&#39;444&#39;);
$redis->smove(&#39;test&#39;,"test1",&#39;111&#39;);
print_r($redis->sort(&#39;test1&#39;)); //结果:Array ( [0] => 111 [1] => 222 [2] => 444 )
?>

21,scontains

描述:检查集合中是否存在指定的值。

参数:key value

返回值:true or false

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd(&#39;test&#39;,&#39;111&#39;);
$redis->sadd(&#39;test&#39;,&#39;112&#39;);
$redis->sadd(&#39;test&#39;,&#39;113&#39;);
var_dump($redis->scontains(&#39;test&#39;, &#39;111&#39;)); //结果:bool(true)
?>

22,ssize

描述:返回集合中存储值的数量

参数:key

返回值:成功返回数组个数,失败0

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd(&#39;test&#39;,&#39;111&#39;);
$redis->sadd(&#39;test&#39;,&#39;112&#39;);
echo $redis->ssize(&#39;test&#39;); //结果:2
?>

23,spop[可实现随机抽奖功能]

描述:随机移除并返回key中的一个值

参数:key

返回值:成功返回删除的值,失败false

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd("test","111");
$redis->sadd("test","222");
$redis->sadd("test","333");
var_dump($redis->spop("test")); //结果:string(3) "333"
?>

24,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

返回值:成功返回数组交集,失败false

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd("test","111");
$redis->sadd("test","222");
$redis->sadd("test","333");
$redis->sadd("test1","111");
$redis->sadd("test1","444");
var_dump($redis->sinter("test","test1")); //结果:array(1) { [0]=> string(3) "111" }
?>

25,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:成功返回,交集的个数,失败false

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd("test","111");
$redis->sadd("test","222");
$redis->sadd("test","333");
$redis->sadd("test1","111");
$redis->sadd("test1","444");
var_dump($redis->sinterstore(&#39;new&#39;,"test","test1")); //结果:int(1)
var_dump($redis->smembers(&#39;new&#39;)); //结果:array(1) { [0]=> string(3) "111" }
?>

26,sunion

描述:

返回一个所有指定键的并集

参数:

  • Keys: key1, key2, … , keyN

返回值:成功返回合并后的集,失败false

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd("test","111");
$redis->sadd("test","222");
$redis->sadd("test","333");
$redis->sadd("test1","111");
$redis->sadd("test1","444");
print_r($redis->sunion("test","test1")); //结果:Array ( [0] => 111 [1] => 222 [2] => 333 [3] => 444 )
?>

27,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. key1..keyN are intersected as in sInter.

返回值:成功返回,交集的个数,失败false

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd("test","111");
$redis->sadd("test","222");
$redis->sadd("test","333");
$redis->sadd("test1","111");
$redis->sadd("test1","444");
var_dump($redis->sinterstore(&#39;new&#39;,"test","test1")); //结果:int(4)
print_r($redis->smembers(&#39;new&#39;)); //结果:Array ( [0] => 111 [1] => 222 [2] => 333 [3] => 444 )
?>

28,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【排除第一个数组中,和后续数据重复的值】

参数:Keys: key1, key2, … , keyN: Any number of keys corresponding to sets in redis.

返回值:成功返回数组,失败false

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd("test","111");
$redis->sadd("test","222");
$redis->sadd("test","333");
$redis->sadd("test1","111");
$redis->sadd("test1","444");
print_r($redis->sdiff("test","test1")); //结果:Array ( [0] => 222 [1] => 333 )
?>

29,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:成功返回数字,失败false

范例:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd("test","111");
$redis->sadd("test","222");
$redis->sadd("test","333");
$redis->sadd("test1","111");
$redis->sadd("test1","444");
var_dump($redis->sdiffstore(&#39;new&#39;,"test","test1")); //结果:int(2)
print_r($redis->smembers(&#39;new&#39;)); //结果:Array ( [0] => 222 [1] => 333 )
?>

30,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:

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->delete(&#39;test&#39;);
$redis->sadd("test","111");
$redis->sadd("test","222");
print_r($redis->smembers(&#39;test&#39;)); //结果:Array ( [0] => 111 [1] => 222 )
?>

31,close

描述:释放资源

<?php
$redis = new redis();
$redis->connect(&#39;127.0.0.1&#39;, 6379);
$redis->close()
?>

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