Summary of common methods for operating redis in PHP

This article mainly introduces 30 code examples of common methods for operating redis in PHP. This article actually has more than 30 methods, which can operate string type, list type and set type data. Friends in need can refer to it

There are many redis operations. I saw a relatively comprehensive blog before, but I can’t find it now. After searching for a long time, I will summarize some examples of PHP processing redis. I personally think some examples are commonly used. The following examples are all based on the php-redis extension.

1, connect

Description: The instance is connected to a Redis.
Parameters: host: string, port: int
Return value: BOOL returned successfully : TRUE; Failure return: FALSE

Example:

 connect('127.0.0.1', 6379); 
var_dump($result); //结果：bool(true) 
?>

2,set

Description: Set the value of key and value
Parameter: Key Value
Return Value: BOOL Successful return: TRUE; Failure return: FALSE
Example:

 connect('127.0.0.1', 6379); 
$result = $redis->set('test',"11111111111"); 
var_dump($result);    //结果：bool(true) ?>

3, get

Description: Get the value of the specified key
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:

 connect('127.0.0.1', 6379); 
$result = $redis->get('test'); 
var_dump($result);   //结果：string(11) "11111111111" ?>

4, delete

Description: Delete the specified key
Parameters: a key, or an undetermined number of parameters, an array for each key: key1 key2 key3 ... keyN
Return value: number of deleted items
Example:

connect('127.0.0.1', 6379); 
$redis->set('test',"1111111111111"); 
echo $redis->get('test');   //结果：1111111111111 $redis->delete('test'); 
var_dump($redis->get('test'));  //结果：bool(false) ?>

5, setnx

Description: If the key does not exist in the database, set the key value parameter
Parameter: key value
Return value: BOOL Successful return: TRUE; Failure return: FALSE

Example:

connect('127.0.0.1', 6379); 
$redis->set('test',"1111111111111"); 
$redis->setnx('test',"22222222"); 
echo $redis->get('test');  //结果：1111111111111 $redis->delete('test'); 
$redis->setnx('test',"22222222"); 
echo $redis->get('test');  //结果：22222222 ?>

6, exists

Description: Verify specified Whether the key exists
Parameter key
Return value: Bool Success return: TRUE; Failure return: FALSE
Example:

connect('127.0.0.1', 6379); 
$redis->set('test',"1111111111111"); 
var_dump($redis->exists('test'));  //结果：bool(true) ?>

7, incr

Description: Number increment Stores the key value key.
Parameters: key value: the value that will be added to the key
Return value: INT the new value
Example:

<p style="margin-bottom: 7px;">connect(&#39;127.0.0.1&#39;, 6379); <br/>$redis->set(&#39;test&#39;,"123"); <br/>var_dump($redis->incr("test"));  //结果：int(124) var_dump($redis->incr("test"));  //结果：int(125) ?><br/></p>

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
Example:

connect('127.0.0.1', 6379); 
$redis->set('test',"123"); 
var_dump($redis->decr("test"));  //结果：int(122) var_dump($redis->decr("test"));  //结果：int(121) ?>

9, getMultiple

Description: Get all Specifies the value of the key. If one or more keys do not exist, the value of that key in the array is false
Parameters: Array of lists containing the values ​​of the keys
Return value: Returns an array containing the values ​​of all keys
Example:

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

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: Returns the length of the array on success, false on failure
Example:

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
var_dump($redis->lpush("test","111"));   //结果：int(1) var_dump($redis->lpush("test","222"));   //结果：int(2) ?>

11, rpush

Description: Add a string from the end of the list value. 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: Returns the length of the array on success, false on failure
Example:

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
var_dump($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 list The first element
Parameters: key
Return value: Returns the value of the first element if successful, false if failed
Example:

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$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.
Parameter: Key
Return value: Returns the array length on success, false on failure
Example:

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$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 specified key stored in the list specified Elements. 0 for the first element, 1 for the second... -1 for the last element, -2 for the second to last... Returns FALSE if the wrong index or key does not point to the list.
Parameter: key index
Return value: Return the value of the specified element successfully, false on failure
Example:

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$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: The index specified for the list Assign a new value, if the index does not exist, return false.
Parameter: key index value
Return value: Return true if successful, false if failed
Example:

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$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 element stored from start to end in the specified key list in the area, lGetRange(key, start, end). 0 the first element, 1 the second element... -1 the last element, -2 the second to last...
Parameters: key start end
Return value: Return the value found successfully, false on failure
Example:

 connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$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 head of the list. 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: Returns the number of deleted items if successful, false if failed
Example:

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

18, sadd

Description: Add a Key a value. If this value is already in this Key, return FALSE.
Parameter: key value
Return value: Return true on success, false on failure
Example:

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

19, sremove

Description: Delete the value specified in Key
Parameter: key member
Return value: true or false
Example:

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

20,smove

Description: Move the value in Key1 to Key2
Parameters: srcKey dstKey member
Return value: true or false
Example

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$redis->delete('test1'); 
$redis->sadd('test','111'); 
$redis->sadd('test','333'); 
$redis->sadd('test1','222'); 
$redis->sadd('test1','444'); 
$redis->smove('test',"test1",'111'); 
print_r($redis->sort('test1'));    //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：

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$redis->sadd('test','111'); 
$redis->sadd('test','112'); 
$redis->sadd('test','113'); 
var_dump($redis->scontains('test', '111')); //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：

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$redis->sadd('test','111'); 
$redis->sadd('test','112'); 
echo $redis->ssize('test');   //结果：2 ?>

23，spop

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：

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$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：

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$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:

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$redis->sadd("test","111"); 
$redis->sadd("test","222"); 
$redis->sadd("test","333"); 
$redis->sadd("test1","111"); 
$redis->sadd("test1","444"); 
var_dump($redis->sinterstore('new',"test","test1"));  //结果：int(1) var_dump($redis->smembers('new'));  //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：

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$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:

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$redis->sadd("test","111"); 
$redis->sadd("test","222"); 
$redis->sadd("test","333"); 
$redis->sadd("test1","111"); 
$redis->sadd("test1","444"); 
var_dump($redis->sinterstore('new',"test","test1"));  //结果：int(4) print_r($redis->smembers('new'));  //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
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：

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$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：

connect('127.0.0.1', 6379); 
$redis->delete('test'); 
$redis->sadd("test","111"); 
$redis->sadd("test","222"); 
$redis->sadd("test","333"); 
$redis->sadd("test1","111"); 
$redis->sadd("test1","444"); 
var_dump($redis->sdiffstore('new',"test","test1"));  //结果：int(2) print_r($redis->smembers('new'));  //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：

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

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