PHP Session Best writes information to Memcache Management _php tutorial

PHP Session Best writes information to Memcache management

The previous approach and benefits of storing data information caches with Memcache can reduce the number of accesses to the database and reduce the stress on the database when the traffic is large.

Store session to Memcache management needs to understand memcache, session usage, and Session_set_save_handler ()

Also write a common class first, of course, using static member methods

Memcache command with Telnet operation

Also now create the required files in the root directory

Where memsession.class.php is a common Memcache storage class file, one.php, two.php, and three.php are test files, items.php is an array of output data

In session.class.php:

First define the variables used to connect the Memcache and initialize

 
  Connect ("localhost", 11211) or die ("could not Connect");    Memsession::start ($memcache);

Note that NS is a constant, which defines the subscript

Re-initialize Method

    Initialization method    private static function init ($handler) {self    :: $handler = $handler;    Self:: $lifetime =ini_get (' session.gc_maxlifetime ');    Self:: $time =time ();    }

Open the session and define the method called open, close, etc. in this class

    Open session public    static function start (Memcache $memcache) {    //First initialize the property    self::init ($memcache);  Call handler and call handler later with Memcache    Session_set_save_handler (    array (__class__, ' open '),//Call the Open method of this class Array (    __class__, ' close '), Array (    __class__, ' read '), array (    __class__, ' write '), array (    __class__ , ' Destroy '),    Array (__class__, ' GC ')    );    Call Session_Start ()    session_start ();    }

The next step is to define the methods called above

Open () and close () as long as the return is true, but the argument of open () is the path and name (name)

    public static function open ($path, $name) {    return true;    }    public static function Close () {    return true;    }

read () only need to have PHPSESSID parameterCan

But to determine if the incoming out parameter has a value, a value returns the out data

    public static function read ($PHPSESSID) {    $out =self:: $handler->get (Self::session_key ($PHPSESSID));  Get the data for the subscript output    if ($out ===false | | $out ==null) {    return ';  Out get data no, return empty    } return    $out;  Return the resulting data    }

Write ():

Returns the ID, data, and duration of the life itself

    public static function Write ($PHPSESSID, $data) {    //To determine if there is data    $method = $data? ' Set ': ' Relpace ';    Return self:: $handler-$method (Self::session_key ($PHPSESSID), $data, memcache_compressed, Self:: $lifetime);    }

Destroy () and GC ():

Destroy () calls its own Delete method

    public static function Destroy ($PHPSESSID) {    return self:: $handler->delete (Self::session_key ($PHPSESSID));  Call the Delete method    } public    static function gc ($lifetime) {    return true;    }

Next you need to define a method for passing in PHPSESSID

    private static function Session_key ($PHPSESSID) {    $session _key=self::ns. $PHPSESSID;//key value for itself and passed in Phpsessid    return $session _key;    }

Results show

If successful, display in Telnet

Indicates that session data information is stored to memcache success

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