This article describes the method of Zend Framework to store sessions in memcache. Share it for your reference, as follows:
In the zend framework, the session can be stored in the database, but memcache is not supported yet, so I implemented it simply.
The following is the SaveHandler, the file name is: , put it in the /Zend/Session/SaveHandler directory, the code is as follows (it needs to be supported by php_memcache, because of the character length limitation, I removed some comments):
require_once 'Zend/';
require_once 'Zend/';
class Zend_Session_SaveHandler_Memcached implements Zend_Session_SaveHandler_Interface
{
const LIFETIME = 'lifetime';
const OVERRIDE_LIFETIME = 'overrideLifetime';
const MEMCACHED = 'memcached';
protected $_lifetime = false;
protected $_overrideLifetime = false;
protected $_sessionSavePath;
protected $_sessionName;
protected $_memcached;
/**
* Constructor
*
* $config is an instance of Zend_Config or an array of key/value pairs containing configuration options for
* Zend_Session_SaveHandler_Memcached . These are the configuration options for
* Zend_Session_SaveHandler_Memcached:
*
*
* sessionId => The id of the current session
* sessionName => The name of the current session
* sessionSavePath => The save path of the current session
*
* modified => (string) Session last modification time column
*
* lifetime => (integer) Session lifetime (optional; default: ini_get('session.gc_maxlifetime'))
*
* overrideLifetime => (boolean) Whether or not the lifetime of an existing session should be overridden
* (optional; default: false)
*
* @param Zend_Config|array $config User-provided configuration
* @return void
* @throws Zend_Session_SaveHandler_Exception
*/
public function __construct($config)
{
if ($config instanceof Zend_Config) {
$config = $config->toArray();
} else if (!is_array($config)) {
/**
* @see Zend_Session_SaveHandler_Exception
*/
require_once 'Zend/Session/SaveHandler/';
throw new Zend_Session_SaveHandler_Exception(
'$config must be an instance of Zend_Config or array of key/value pairs containing '
. 'configuration options for Zend_Session_SaveHandler_Memcached .');
}
foreach ($config as $key => $value) {
do {
switch ($key) {
case self::MEMCACHED:
$this->createMemcached($value);
break;
case self::LIFETIME:
$this->setLifetime($value);
break;
case self::OVERRIDE_LIFETIME:
$this->setOverrideLifetime($value);
break;
default:
// unrecognized options passed to parent::__construct()
break 2;
}
unset($config[$key]);
} while (false);
}
}
/**
* Create a memcached connection object
*
* @return void
*/
public function createMemcached($config){
$mc = new Memcache;
foreach ($config as $value){
$mc->addServer($value['ip'], $value['port']);
}
$this->_memcached = $mc;
}
public function __destruct()
{
Zend_Session::writeClose();
}
/**
* Set session lifetime and optional whether or not the lifetime of an existing session should be overridden
*
* $lifetime === false resets lifetime to session.gc_maxlifetime
*
* @param int $lifetime
* @param boolean $overrideLifetime (optional)
* @return Zend_Session_SaveHandler_Memcached
*/
public function setLifetime($lifetime, $overrideLifetime = null)
{
if ($lifetime < 0) {
/**
* @see Zend_Session_SaveHandler_Exception
*/
require_once 'Zend/Session/SaveHandler/';
throw new Zend_Session_SaveHandler_Exception();
} else if (empty($lifetime)) {
$this->_lifetime = (int) ini_get('session.gc_maxlifetime');
} else {
$this->_lifetime = (int) $lifetime;
}
if ($overrideLifetime != null) {
$this->setOverrideLifetime($overrideLifetime);
}
return $this;
}
/**
* Retrieve session lifetime
*
* @return int
*/
public function getLifetime()
{
return $this->_lifetime;
}
/**
* Set whether or not the lifetime of an existing session should be overridden
*
* @param boolean $overrideLifetime
* @return Zend_Session_SaveHandler_Memcached
*/
public function setOverrideLifetime($overrideLifetime)
{
$this->_overrideLifetime = (boolean) $overrideLifetime;
return $this;
}
public function getOverrideLifetime()
{
return $this->_overrideLifetime;
}
/**
* Retrieve session lifetime considering
*
* @param array $value
* @return int
*/
public function open($save_path, $name)
{
$this->_sessionSavePath = $save_path;
$this->_sessionName = $name;
return true;
}
/**
* Retrieve session expiration time
*
* @param * @param array $value
* @return int
*/
public function close()
{
return true;
}
public function read($id)
{
$return = '';
$value = $this->_memcached->get($id); //Get data if ($value) {
if ($this->_getExpirationTime($value) > time()) {
$return = $value['data'];
} else {
$this->destroy($id);
}
}
return $return;
}
public function write($id, $data)
{
$return = false;
$insertDate = array('modified' => time(),
'data' => (string) $data);
$value = $this->_memcached->get($id); //Get data if ($value) {
$insertDate['lifetime'] = $this->_getLifetime($value);
if ($this->_memcached->replace($id,$insertDate)) {
$return = true;
}
} else {
$insertDate['lifetime'] = $this->_lifetime;
if ($this->_memcached->add($id, $insertDate,false,$this->_lifetime)) {
$return = true;
}
}
return $return;
}
public function destroy($id)
{
$return = false;
if ($this->_memcached->delete($id)) {
$return = true;
}
return $return;
}
public function gc($maxlifetime)
{
return true;
}
protected function _getLifetime($value)
{
$return = $this->_lifetime;
if (!$this->_overrideLifetime) {
$return = (int) $value['lifetime'];
}
return $return;
}
protected function _getExpirationTime($value)
{
return (int) $value['modified'] + $this->_getLifetime($value);
}
}
Configuration (multiple memcache servers can be added to be distributed):
$config = array(
'memcached'=> array(
array(
'ip'=>'192.168.0.1',
'port'=>11211
)
),
'lifetime' =>123334
);
//create your Zend_Session_SaveHandler_DbTable and
//set the save handler for Zend_Session
Zend_Session::setSaveHandler(new Zend_Session_SaveHandler_Memcached($config));
//start your session!
Zend_Session::start();
After configuration, the usage method of session is the same as before, regardless of how the underlying layer is implemented!
For more information about Zend, please visit the special topic of this site:Zend FrameWork framework tutorial》、《Summary of excellent development framework for php》、《Yii framework introduction and common techniques summary》、《ThinkPHP Introduction Tutorial》、《PHP object-oriented programming tutorial》、《PHP+mysql database operation tutorial"and"Summary of common database operation techniques for php》
I hope that this article will be helpful to everyone's PHP programming based on the Zend Framework framework.