Redis Study Notes 5 common php functions

Redis learning Notes: The php function PHPRedis is often used here: blog. csdn. netxundharticledetails46288277 key value operation $ redisnewRedis (); $ redis-& gt; connect (127.0.0.1, 6379); parameter: connect (host, port, timeout Redis study notes five common php functions

Install PHPRedis here:

Http://blog.csdn.net/xundh/article/details/46288277

Key-value operation

$ Redis = new Redis (); $ redis-> connect ('2017. 0.0.1 ', 6379); // parameter: connect (host, port, timeout) // timeout can be empty in redis. timeout in conf is 300 by default. // pconnect does not close the connection.

Key

// Write value $ redis-> set ($ work-> uid, $ workString); $ redis-> setnx ($ work-> uid, $ workString ); // if the key does not exist, it is assigned $ redis-> setex ($ a, 50, 1); // after the range value is set, the ttl is set to 50 $ redis-> setrange (key, offset, value); // get the value $ redis-> get ($ work-> uid); // delete key $ redis-> del ($ work-> uid ); var_dump ($ redis-> get ($ work-> uid); // returns bool (false) // if (! $ Redis-> exists ('key') var_dump ($ redis-> del ('key'); // return int (0)

Mset multiple key operations

// Set mset $ array_mset = ['a' => 1, 'B' => 2]; $ redis-> mset ($ array ); $ redis-> msetnx ($ array); // write data only when the key does not exist, but either completely or completely. // Read mset $ array_mget = ['A', 'B']; $ redis-> mget ($ arram_mget ); // delete multiple keys $ redis-> del ($ array_mget );

Keys

// Read keys $ array_mset_keys = ['ABC' => 1, 'bcd' => 2, 'Cde' => 3]; $ redis-> keys ('* a *'); // return ['a' => 1]; $ redis-> keys ('B ?? '); // Return [' B '=> 2]; $ redis-> keys (' * '); // return all keys

Getset key value

Set the value and return the old value

Strlen

Returns the string length.

Getrange (substr)

String truncation

Rename

Key rename

$ Redis-> rename ('A', 'A1'); // if the key does not exist, true is returned. if the key does not exist, the value of newkey is overwritten;

Renamex

Key name, not changed when newkey exists

$ Redis-> renamex ('A', 'A1'); // If a1 already exists, return 0;

Append

String appending

$ Redis-> append ('A', '20140901'); // If a does not exist, it is a normal set operation.

Incr

Increase the stored numeric value by 1

Incrby

Value increase increment

$redis->incrby('a',10);

Decr

Number minus 1

Decrby

Numeric value minus decrement

Setbit key offset value

Set or clear positioning

Getbit key offset

Obtains the bit at the specified offset.

Type

Return key value type
The return values include:

None	(Key does not exist)	Int (0)
String	String	Int (1)
List	List	Int (3)
Set	Set	Int (2)
Zset	Ordered set	Int (4)
Hash	Hash table	Int (5)

Randomkey

Returns a random key.

Echo $ redis-> randomkey (); // if no key is returned, false is returned.

Object

View object

Move

Mobile data

$ Redis-> MOVE ('A', 1); // MOVE key a from the current database to 1. If the key does not exist, false is returned. if the target database has a key, false is returned.

Hashhset key field value

Set the hash value

Hsetnx key field value

Set the value if it does not exist.

Hmset key field value [field value…]

Set multiple hash values

Hget key field

Obtain the hash field value

HMET key field [field…]

Obtain several domain values

Hgetall key

Returns all key fields and values.

Hdel key field [field…]

Deletes one or more domains.

Hlen key

Returns the number of domains in the key.

Hexists key field

Check whether the field of the given field in the key exists.

Hincrby key field increment

Increment added to the domain value

Hkeys key

Returns all domains.

Hvals key

Returns all key values.

Table lpush key value [value…] Insert one or more values in the header

$redis->lpush('a',1);$redis->lpush('a',2);

Lpushx key value

Insert only when the key exists and is a list

Rpush key value

Insert at the end of the table

Rpushx key valuelpop key

Remove and return the key header element

Rpop key

Remove and return the end element of the key

Blpop key [key…]

Timeout lpop blocking version. if there are no elements available for pop-up, the program will wait.

Brpop key [key…]

Timeout rpop blocking version

Llen key

Returns the length of the list key.

Lrange key start stop

Return interval

Lrem key count value

Remove an element whose list value is value
Count> 0: search from the header to the end of the table, remove the element with the value of value, the number is count
Count <0 removes the element with the value from the end of the table to the header, and the number is-count.
Count = 0 remove the element with the value

Lset key index value

Set the key subscript to the index value

Ltrim key start stop

Trim the list and delete out-of-range elements

Lindex key index

Returns the index element.

Linsert key

Insert

Rpoplpush source destination

The last element is displayed, and the element is inserted into the destination list as the header.

Brpoplpush source destination timeout

Blocking

Set sadd key member [member…]

Insert elements into the set

Srem key member [member…]

Remove element

Smembers key

Returns a set member.

Sismember key member

Judge whether member is a key member

Scard key

Returns the base number of the set key.

Smove source destination member

Move the member element from source to destination

Spop key

Removes and returns a random element from the set.

Srandmember

Returns a random element in the set.

Sinter key [key…]

Returns a set member.

Sinterstore destination key [key…]

Returns the members to destination. if the target exists, it overwrites

Sunion key [key…]

Returns all members of the set.

Sunionstore destination key [key…]

Save the returned members to destination.

Sdiff key [key…]

Returns all members of a set.

Sdiffstore destination key [key…]

Save the result to destination.

Sorted Set ordered Set zadd key score member [[score member] [score member]…]

One or more member and its scores are added to the sorted set key.

Zrem key member [member…]

Removes one or more members from the sorted set key.

Zcard key

Returns the base number of the sorted set key.

Zcount key min max

Returns the members of the sorted set key whose score value is between min and max.

Zscore key member

Returns the score value of the member in the sorted set key.

Zincreby key increment member

Score increment for member members

Zrange key start stop [WITHSCORES]

Returns the specified range member in the sorted set key, and the score ranges from small to large.

Zrevrange key start stop [WITHSCORES]

Returns the members in the specified range in the key. The score ranges from large to small.

Zrangebyscore

Returns a range Member. The score ranges from small to large.

Zrevrangebyscore key max min [WITHSCORES] [LIMIT offset count]

Back to the honorable Member, score from large to small

Zrank key member

Returns the member ranking. The score ranges from small to large.

Zrevrank key member

Member ranking, score decreasing

ZREMRANGEBYRANK key start stop

Remove members. the subscript is between start stop.

ZREMRANGEBYSCORE key min max

Remove a member. the score is between min and max.

ZINTERSTORE destination numkeys key [key…] [WEIGHTS weight [weight…] [Aggregate sum | MIN | MAX]

Calculate the intersection of ordered sets

ZUNIONSTORE

Calculate the union of sorted sets

Sort value sorting

$ Redis-> SORT ('A'); // return the sorting result

Alpha is sorted by characters.

$ Redis-> SORT ('A', array ('alpha' => TRUE); // return the sorting result

Limit the number of returned results

$redis->SORT('a',array('LIMIT'=>array(0,5));

SORT limit forward and reverse order

$redis->SORT('a',array('SORT'=>'DESC'));

By external sorting

$redis->SORT('a',array('BY'=>''));

Sorting is used in many other ways. I will not detail them here.

Ttl, expire, expireat

$ Redis-> set ('A', 12345); $ redis-> expire ('A', 30); // unit: seconds $ redis-> expireat ('A ', '20140901'); // accept the timestamp echo $ redis-> get ('A'); // if it has expired, returns falseecho $ redis-> ttl ('A'); // returns the remaining time (seconds ). If the expire value is not assigned,-1 is returned. if the key does not exist,-1 is returned.

Persit remove survival time

$redis->persist('a');

Select database for database operations

$ Redis-> SELECT (0); // The default value is database 0.

Clear

$ Redis-> FLUSHALL (); // delete all databases $ redis-> flushdb (); // delete all keys of the current database