PHP implements redis storage session and phpredissession

PHP implements redis storage session and phpredissession

I. First implement SessionHandlerInterface (this interface is PHP> 5.4.0), as shown below:

<? Php/*** Store sessions in db Mode*/NamespaceOC \ Session;ClassRedisSessionImplements\ SessionHandlerInterface {/*** Save session redis Information*/    Private$ _ Options =Array('Handler' =>Null, // Redis connection handle 'host' =>Null, 'Port' =>Null, 'Lifetime' =>Null,);/*** Constructor*@ Param$ Options: Set an array of information*/    Public function_ Construct ($ options =Array()){If(! Class_exists ("redis ",False)){Die("Redis extensions must be installed ");}If(!Isset($ Options ['lifetime']) | $ options ['lifetime'] <= 0) {$ options ['lifetime'] = ini_get ('session. gc_maxlifetime');} $ this-> _ options = array_merge ($ this-> _ options, $ options );}/*** Start to use the driver's session*/    Public functionBegin (){If($ This-> _ options ['host'] =Null| $ This-> _ options ['Port'] =Null| $ This-> _ options ['lifetime'] =Null        ){Return false;} // Sets the session processing function session_set_save_handler (Array($ This, 'open '),Array($ This, 'close '),Array($ This, 'read '),Array($ This, 'write '),Array($ This, 'destory '),Array($ This, 'gc '));}/*** The first called function after automatic start or session_start ()* Functions similar to constructors*@ Param$ SavePath default save path*@ Param$ SessionName: default parameter name, PHPSESSID*/    Public functionOpen ($ savePath, $ sessionName ){If(Is_resource ($ this-> _ options ['handler'])Return true; // Connect to redis $ redisHandle =New\ Redis (); $ redisHandle-> connect ($ this-> _ options ['host'], $ this-> _ options ['Port']);If(! $ RedisHandle ){Return false;} $ This-> _ options ['handler'] = $ redisHandle; $ this-> gc (Null);Return true;}/*** Similar to the destructor, it is called after write or after session_write_close ().*/    Public functionClose (){Return$ This-> _ options ['handler']-> close ();}/*** Read session information*@ Param$ SessionId uniquely identifies the corresponding session data through this Id*@ ReturnSession information/empty string*/    Public functionRead ($ sessionId ){Return$ This-> _ options ['handler']-> get ($ sessionId );}/*** Write or modify session data*@ Param$ SessionId: id of the session to which data is to be written*@ Param$ SessionData: The data to be written has been serialized.*/    Public functionWrite ($ sessionId, $ sessionData ){Return$ This-> _ options ['handler']-> setex ($ sessionId, $ this-> _ options ['lifetime'], $ sessionData );}/*** Actively destroys session*@ Param$ SessionId: Unique id of the session to be destroyed*/    Public functionDestroy ($ sessionId ){Return$ This-> _ options ['handler']-> delete ($ sessionId)> = 1?True:False;}/*** Clear the expired data in the painting.*@ ParamValidity Period*/    Public functionGc ($ lifeTime) {// obtain all sessionids and release expired ones $ this-> _ options ['handler']-> keys ("*");Return true;}}
The above is a complete class for implementing interfaces, which is encapsulated into a file

Ii. Call method:

session_set_save_handler(\OC::$server->getRedisSession(),true);register_shutdown_function('session_write_close');session_start();
That is, calling the session_start () method is equivalent to telling the session storage location to change to redis storage. At this point, all the data stored by the $ _ SESSION method will be automatically put into redis, the key value used for storage is session_id ().

Iii. Explanation:

\OC::$server->getRedisSession()

The above method uses the pimple container to store and call objects. The usage is as follows:

namespace OC;

class Server extends SimpleContainer implements IServerContainer {

Register an object in this server class,

$this->registerService('RedisSession',function (Server $c) {   return new \OC\Session\redisSession(      $c->getSystemConfig()->getValue('redis')   );});

Object retrieval method:

/*** The newly added method for getting user redissession*/Public functionGetRedisSession (){Return$ This-> query ('redissession ');}

Actually

Session_set_save_handler (\ OC ::$ Server-> GetRedisSession (),True);

\OC::$server->getRedisSession()

YesFirst,Class Object in

Reference: http://www.tuicool.com/articles/yeeyume

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