Predis Operation Daquan

Predis is a PHP connection Redis operation Library, because it completely use PHP writing, a lot of use of namespaces and closures and other functions, only support php5.3 above version, so the measured performance, 25,000 times per second read and write, I believe that the C language written by PHP extension performance will greatly improve ( For example, use C extension Phpredis Https://github.com/owlient/phpredis).

It's also easy to store session data in Redis:
Session.save_handler = Redis
Session.save_path = "Tcp://127.0.0.1:6379″

Use AutoLoad to load the relevant library, the focus here is to require  $file; Spl_autoload_register (function ($class)  {      $file  = __dir__. ' /lib/predis/'. $class. php ';    if  (file_exists ($file))  {         require  $file;        return true;     });//Configure the connected IP, port, and corresponding database $server = array (     ' host '       =>  ' 127.0.0.1 ',     ' Port '      => 6379 ,     ' database '  => 15); $redis  = new client ($server);//General set/ Get Operation $redis->set (' Library ',  ' Predis '), $retval  =  $redis->get (' library ');echo  $retval;  //display   ' Predis '//setex set a storage aging $redis->setex (' str ', 10,  ' bar ');  //means storage is valid for 10 seconds Setnx/msetnx equivalent to the add operation, does not overwrite the existing value $redis->setnx (' foo ');  //true$redis-&gtSetnx (' foo '),  //false//getset operation, set variant, results return the value before replacement $redis->getset (' foo ', 56);//Return 34// INCRBY/INCR /decrby/decr  increment and decrement of Values $REDIS->INCR (' foo '),  //foo to 57$redis->incrby (' foo ', 2);  //foo to 59// exists detects if there is a value $redis->exists (' foo ');//true//del  delete $redis->del (' foo ');//true//type  type detection, The string returned by the  list,set table returns the Set/zset,hash table return Hash$redis->type (' foo '), or//not present, returning None$redis->set (' str ', ' Test '); $redis->type (' str ');  //string, return string//append  to the existing string $redis->append (' str ', ' _123 ');  //returns the cumulative string length of 8, this input str for   ' test_123 '//setrange  partial replacement Operation $redis->setrange (' str ', 0, ' abc ');  // Return 3, Parameter 2 is 0 o'clock equivalent to the set Operation $redis->setrange (' str ', 2, ' CD ');//Return 4, representing the 2nd word specifier replace, then ' str ' for ' ABCD '//substr  partial get operation $ Redis->substr (' str ', 0,2);//Represents the 2nd character from No. 0, a total of 3, return ' abc '//strlen  get string length $redis->strlen (' str ');  / /return 4//setbit/getbit  bit to store and get $redis->setbit (' binary ', 31,1);   //says 1 in 31st place, there may be a size end problem? But it doesn't matter, getbit  should not have a problem $redis->getbit(' binary ', +);     //returns the 1//keys  Fuzzy Lookup function, which supports the * number as well as the number (matches one character) $redis->set (' foo1 ', 123); $ Redis->set (' Foo2 ', 456); $redis->keys (' foo* ');  //return foo1 and Foo2 (' F array$redis->keys ');   //Ibid//randomkey  randomly returns a Key$redis->randomkey ();  //may be back   ' foo1 ' or ' Foo2 ' And any other Redis key//rename/renamenx  to rename the key, the difference is that Renamenx is not allowed to change to existing key$redis->rename (' str ', ' str2 ');  //renamed ' str ' key to ' str2 '//expire  set Key-value's timeliness,ttl  get remaining validity,persist  reset to permanent storage $redis- >expire (' foo ',  1),  //set is valid for 1 seconds $redis->ttl (' foo '),  //returns the validity value 1s$redis->expire (' foo ');  //cancels expire behavior//dbsize  returns the total number of records in the current database $redis->dbsize ();/* Queue operations *///rpush/rpushx  ordered list operations, Inserting elements from the queue//lpush/lpushx  and rpush/rpushx are inserted into the head of the queue, as above, ' X ' means to operate only on existing keys $redis->rpush (' foolist ',  ' Bar1 ');  //returns the length of a list 1$redis->lpush (' foolist ',  ' bar0 ');  //returns the length of a list 2$redis->rpushx (' Foolist ',  ' bar2 ');  //returns 3,RPUSHX only adds to the existing queue, otherwise returns 0//Llen returns the current list length $redis->llen (' foolist ');//3//lrange  returns an element of an interval in the queue $redis->lrange (' foolist ', 0,1);  // The returned array contains No. 0 to 1th of a total of 2 elements $redis->lrange (' foolist ', 0,-1);//return No. 0 to the penultimate, equivalent to return all elements, note that Redis often uses negative numbers, the same as//lindex  Returns the list element $redis->lindex (' foolist ', 1) in the specified order position,  //returns ' Bar1 '//lset  modifies the value$redis->lset of the specified position in the queue (' Foolist ', 1, ' 123 ');//Modify the element of position 1, return true//lrem  the specified number of characters from the left in the delete queue $redis->lrem (' Foolist ', 1, ' _ ');  //Delete queue from left ( Right up using-1) 1 characters ' _ ' (if any)//lpop/rpop  like a stack structure to pop (and delete) the leftmost or most right element $redis->lpop (' foolist ');  //' Bar0 ' $redis Rpop (' foolist ');  //' bar2 '//ltrim  queue modified, leaving several elements on the left, remaining deleted $redis->ltrim (' Foolist ',  0,1);  // Keep No. 0 to 1th elements from the left//rpoplpush  the pop element from one queue and push it to another queue $redis->rpush (' List1 ', ' ab0 '); $redis->rpush (' List1 ') , ' AB1 '); $redis->rpush (' List2 ', ' ab2 '); $redis->rpush (' List2 ', ' ab3 '); $redis->rpoplpush (' List1 ', ' List2 ') ;//Results List1 =>array (' ab0 '), List2 =>array (' ab1 ', ' ab2 ', ' ab3 ') $redis->rpoplpush (' List2 ', ' List2 ') ) and//apply to the same queue, putting the lastElements are moved to the head list2 =>array (' ab3 ', ' ab1 ', ' ab2 ')//linsert  in the middle of the queue by specifying elements before or after inserting elements $redis->linsert (' List2 ',   ' before ', ' ab1 ', ' 123 '),  //means inserting ' ab1 ' before element ' 123 ' $redis->linsert (' List2 ',  ' after ', ' ab1 ', ' 456 ');    //means that after the element ' AB1 ' is inserted ' 456 '//blpop/brpop  block and wait for a queue to not be empty, then pop out the leftmost or most right element (this function can be said to be very useful outside of PHP)// brpoplpush  is also blocking and waiting for the operation, the result is the same as the Rpoplpush $redis->blpop (' List3 ', ten);  //if the list3 is empty, wait until the first element pops up when it is not empty. After 10 seconds Timeout/**set table operation *///sadd  add element, return True, repeat return False$redis->sadd (' Set1 ', ' ab '); $redis->sadd (' Set1 ', ' CD '); $ Redis->sadd (' Set1 ', ' EF ');//srem  removes the specified element $redis->srem (' Set1 ', ' CD ');  //remove ' CD ' element//spop  popup first element $ Redis->spop (' Set1 ');//smove  moves the specified element of the current set table to another set table $redis->sadd (' Set2 ', ' 123 '); $redis->smove (' Set1 ') , ' Set2 ', ' ab ');//move ' ab ' to ' set2 ' in ' Set1 ', return true or false//scard  returns the number of elements in the current set table $redis->scard (' Set2 ');//2//sismember  determine whether the element belongs to the current table $redis->sismember (' Set2 ', ' 123 ');  //true or false//smembers   Returns all elements of the current table $redis->smembers (' Set2 ');  //array (' 123 ', ' AB ');//sinter/sunion/sdiff   returns the intersection/set/complement of elements in two tables $redis-> Sadd (' Set1 ', ' ab '), $redis->sinter (' Set2 ', ' Set1 '),  //return Array (' AB ')//sinterstore/sunionstore/sdiffstore   Copy two table intersection/set/complement elements into the third table $redis->set (' foo ', 0), $redis->sinterstore (' foo ', ' Set1 ');  //side is equivalent to ' Set1 ' Content copy to ' foo ' and ' foo ' to set table $redis->sinterstore (' foo ', Array (' Set1 ', ' Set2 '));  //will ' Set1 ' and ' Set2 ' Copy the same elements in the ' Foo ' table, overwriting ' foo ' with the original content//srandmember  returns a random element in the table $redis->srandmember (' Set1 ');/** ordered set table operation *///sadd   add element and set ordinal, return True, repeat return False$redis->zadd (' Zset1 ', 1, ' ab '); $redis->zadd (' Zset1 ', 2, ' CD '); $redis Zadd (' Zset1 ', 3, ' EF ');//zincrby  the increment and decrement of the index value of the specified element, changing the order of the Elements $redis->zincrby (' Zset1 ', ' Ten, ' ab ');//Return to 11//zrem  Removes the specified element $redis->zrem (' Zset1 ', ' EF '); //true or false//zrange  returns the elements of the specified interval in the table in order of position $redis-> Zrange (' Zset1 ', 0,1);  //returns the element between position 0 and 1 (two) $redis->zrange (' Zset1 ', 0,-1);//Returns the element between the position 0 and the penultimate element (equivalent to all elements)// zrevrange , returns the element of the specified interval in the table, sequentially inverted $redis->zrevrange (' Zset1 ', 0,-1);  //element order and Zrange opposite//zrangebyscore/zrevrangebyscore  in order/ Descending returns the element of the specified index interval in the table $redis->zadd (' Zset1 ', 3, ' EF '), $redis->zadd (' Zset1 ', 5, ' GH '); $redis->zrangebyscore (' Zset1 ', 2,9);  //returns the index value 2-9 between the elements  array (' ef ', ' gh ')//Parameter form $redis->zrangebyscore (' Zset1 ', 2,9, ' withscores ');  //returns the element between the index value 2-9 and contains the index value  array (Array (' EF ', 3), array (' GH ', 5)) $redis->zrangebyscore (' Zset1 ', 2,9,array ( ' Withscores '  =>true, ' limit ' =>array (1, 2));  //returns the element between index value 2-9, ' Withscores '  => True to include the index value;  ' limit ' =>array (1, 2), which indicates a maximum return of 2, with an array (array (' EF ', 3), array (' GH ', 5))//zunionstore/ zinterstore  the set/intersection of multiple tables into another table $redis->zunionstore (' Zset3 ', Array (' Zset1 ', ' Zset2 ', ' zset0 '));  //will ' Zset1 ', ' Zset2 ', ' zset0 ' of the set deposit ' zset3 '//Other parameters $redis->zunionstore (' Zset3 ', Array (' Zset1 ', ' Zset2 '), array (' weights ')  => array (5,0))); The//weights parameter represents a weight, in which the element that represents the sum after the value is greater than 5 is ranked before the $redis->zunionstore (' Zset3 ', Array (' Zset1 ', ' Zset2 '), Array (' aggregate ' =>  ' Max '),//' aggregate '  =>  ' max ' or ' min ' indicates that the same element is either a large value or a small value after the set is taken//zcount  Counts the number of elements in an index interval $redis->zcount (' Zset1 ', 3,5);//2$redis->zcount (' Zset1 ', ' (3 ', 5));  //' (3 ') indicates that the index value is between 3-5 but not 3, Similarly, you can use the ' (5 ') Index of the $redis->zcard (' Zset1 ');//4//zscore  query element with a maximum of 5 but no 5//zcard  statistical elements (' Zset1 ', ' EF ');//3//zremrangebyscore  delete an index interval element $redis->zremrangebyscore (' Zset1 ', 0,2);  // Remove the index between 0-2 elements (' AB ', ' CD '), return the number of deleted elements 2//zrank/zrevrank  return element in the table order/descending position (not the index) $redis->zrank (' Zset1 ', ' ef ');// Returns 0 because it is the first element; Zrevrank returns 1 (the last)//zremrangebyrank  deletes the element $redis->zremrangebyrank (' Zset1 ', 0,10) of the specified position interval in the table;  //deletes the element with position 0-10, returns the number of deleted elements 2 /**hash table operation *///hset/hget  access to the hash table data $redis->hset (' Hash1 ', ' key1 ', ' v1  //the key as ' Key1 '  value for ' v1 ' elements into Hash1 table $redis->hset (' Hash1 ', ' key2 ', ' v2 '); $redis->hget (' Hash1 ', ' Key1 ');   //remove the value of key  ' Key1 ' in the table ' Hash1 ', return ' v1 '//hexists  returns the presence of the specified key in the hash table $redis->hexists   (' Hash1 ', ' key1 ');  //true or false//hdel  Delete the element $redis->hdel (' hash1 ', ' Key2 ') of the specified key in the hash table; //true or  false//hlen  returns the number of hash table elements $redis->hlen (' hash1 '); //1//hsetnx  adds an element, but cannot repeat $redis->hsetnx (' Hash1 ', ' key1 ', ' v2 ');  //false$redis->hsetnx (' Hash1 ', ' key2 ', ' v2 '); //true//hmset/hmget  Access multiple elements to the hash table $redis->hmset (' Hash1 ', Array (' key3 ' = ' v3 ', ' key4 ' = ' v4 ')), $redis->hmget (' Hash1 ', Array (' Key3 ', ' Key4 '));  //returns the corresponding value  array (' v3 ', ' v4 ')//hincrby  the specified key to accumulate $redis->hincrby (' hash1 ', ' Key5 ', 3);  //returns 3$redis->hincrby (' Hash1 ', ' Key5 ', ten);  //returns 13//hkeys  returns all Key$redis->hkeys in the hash table (' Hash1 ');  //returns the array (' Key1 ', ' key2 ', ' Key3 ', ' key4 ', ' key5 ')//hvals  returns all value$redis->hvals in the hash table (' Hash1 ');  //returns the array (' v1 ', ' v2 ', ' v3 ', ' v4 ',//hgetall  ') and returns the entire hash table element $redis->hgetall (' hash1 ');  // Return Array (' key1 ' = ' v1 ', ' key2 ' = ' v2 ', ' key3 ' = ' v3 ', ' key4 ' = ' v4 ', ' Key5 ' =>13)/** sort operations *///sort  sort $ Redis->rpush (' tab ', 3); $redis->rpush (' tab ', 2), $redis->rpush (' tab ', '), $redis->sort (' tab '),   //returns an array (2,3,17)//Using parameters, Can be combined with  array (' sort '  =>  ' desc ', ' Limit '  => array (1, 2)) $redis->sort (' tab ', Array (' sort '  =>  ' desc ');   //in descending order, returning array (17,3,2) $redis->sort (' tab ', Array (' limit ')  => array (1, 2));   //returns the 1 element in the order position 2 (where 2 is the number, not the position), and returns an array (3,17) $redis->sort (' tab ', Array (' Limit '  => array (' alpha '  => true));  //returns an array (17,2,3) sorted by first character, Because the first character of 17 is ' 1 ' so the first row of $redis->sort (' tab ', Array (' Limit '  => array (' store '  =>  ' ordered ') ));  //represents a permanent sort, returning the number of elements $redis->sort (' tab ', Array (' Limit '  => array (' Get '  =>  ' pre_ * '));  //uses the wildcard character ' * ' to filter elements, indicating that only elements beginning with ' pre_ ' are returned/**REDIS administrative operations *///select  Specify the database $redis->select (' MyDB ') to be manipulated;  //specified as MyDB, does not exist then creates//flushdb  empties the current library $redis->flushdb ();//move  move the elements of the library to other libraries $redis->set (' foo ',   ' Bar '); $redis->move (' foo ',  ' mydb2 ');  //if ' MYDB2 ' inventory is displayed in//info  service when status information $redis->info ();//slaveof  configuration from server $redis- >slaveof (' 127.0.0.1 ');  //Configure the server for 127.0.0.1 Port 80 to be from server $redis->slaveof ();  //clear from server//Synchronize Save server data to disk $ Redis->save ();//Asynchronously Save the server data to disk $redis->bgsave ();//?? $redis->bgrewriteaof ();//Returns the last time the disk was updated $redis->lastsave ();//set/get multiple Key-value$mkv = array (      ' usr:0001 '  =>  ' first user ',     ' usr:0002 '  =>   ' Second user ',     ' usr:0003 '  =>  ' third user '); $redis->mset ($mkv);  //stores multiple keys corresponding to value$retval =  $redis->mget (Array_keys ($mkv));  // Get Valueprint_r ($retval) for multiple keys;//Bulk Operation $replies =  $redis->pipeline (function ($pipe)  {      $pipe->ping ();     $pipe->flushdb ();     $pipe- >incrby (' counter ',  10);  //incremental Operation      $pipe->incrby (' counter',  30);     $pipe->exists (' counter ');     $pipe->get (' counter ');     $pipe->mget (' does_not_exist ',  ' counter ');}); Print_r ($replies);//cas, transactional Operations Function zpop ($client,  $zsetKey)  {     $element  = null;     $options  = array (          ' CAs '    => true,     // initialize with  support for CAS operations         ' Watch '  = >  $zsetKey,  // key that needs to be watched to detect  changes         ' Retry '  => 3,         // number of retries on aborted transactions,  after                              // which the client bails out with an exception.     );     $txReply  =  $client->multiexec ($options,  function ($TX)         use  ($zsetKey, & $element)  {          @list ($element)  =  $tx->zrange ($zsetKey,  0,  0);        if  (Isset ($element))  {              $tx->multi ();     //  with cas, multi *must* be explicitly invoked.              $tx->zrem ($zsetKey,  $element);         }     });    return  $element;} $zpopped  = zpop ($redis,  ' Zset '); Echo isset ($zpopped)  ?  "zpoped  $zpopped"  :  "nothing to zpop!",  "\ n";//prefix the access key, such as:  ' NRK: ' $redis->getprofile () Setpreprocessor (New keyprefixpreprocessor (' NRK: '));//Some methods of distributed storage $multiple_servers = array (     array (        ' host '      =>   ' 127.0.0.1 ',        ' Port '      =>  6379,        ' database '  => 15,         ' Alias '     =>  ' first ',    ),     array (        ' host '      =>  ' 127.0.0.1 ',        ' Port '      => 6380,        ' database '  => 15,         ' Alias '     =>  ' second ',    );  Predis\Distribution\IDistributionStrategy;class NaiveDistributionStrategy implements  idistributionstrategy {    private $_nodes, $_nodescount;     public function __constructor ()  {         $this- >_nodes = array ();         $this->_nodescount =  0;    }    public function add ($node,  $weight  = null)  {         $this->_nodes[] =  $node;          $this->_nodescount++;    }     public function&Nbsp;remove ($node)  {         $this->_nodes = array_ Filter ($this->_nodes, function ($n)  use ($node)  {             return  $n  !==  $node;        &NBSP);         $this->_nodescount = count ($this->_ nodes);     }    public function get ($key)  {          $count  =  $this->_nodescount;         if  ($count  === 0)  {             throw new runtimeexception (' no connections ');         }        return  $this->_nodes[$count  > 1 ? abS (CRC32 ($key)  %  $count)  : 0];    }    public  Function generatekey ($value)  {        RETURN CRC32 ($ value);     }}//configuration Key Distribution policy $options = array (     ' key_distribution '  => new naivedistributionstrategy (), "$redis  = new predis\client ($multiple _ servers,  $options);for  ($i  = 0;  $i  set ("Key: $i",  str_pad ($i, 4,  ' 0 ',  0));     $redis->get ("Key: $i");} $server 1 =  $redis->getclientfor (' first ')->info () $server 2 =  $redis->getclientfor ( ' Second ')->info ();p rintf ("server  '%s '  has %d keys while server  '%s '  has %d keys.\n ",     ' first ',  $server 1[' db15 ' [' Keys '],  ' second ',   $server 2[' db15 ' [' Keys ']);

Predis Operation Daquan