Custom Session Handler on CakePHP 2.0.2 - php

Question

i tried follow from http://book.cakephp.org/2.0/en/development/sessions.html#creating-a-custom-session-handler then i cant solve this and im really confuse about this :(
become like this:
<?php
App::uses('DatabaseSession', 'Model/Datasource/Session');
class CartSession implements CakeSessionHandlerInterface {
public $cacheKey;
public function __construct() {
$this->cacheKey = Configure::read('Session.handler.cache');
parent::__construct();
}
// read data from the session.
public function read($id) {
$result = Cache::read($id, $this->cacheKey);
if ($result) {
return $result;
}
return parent::read($id);
}
// write data into the session.
public function write($id, $data) {
$result = Cache::write($id, $data, $this->cacheKey);
if ($result) {
return parent::write($id, $data);
}
return false;
}
// destroy a session.
public function destroy($id) {
$result = Cache::delete($id, $this->cacheKey);
if ($result) {
return parent::destroy($id);
}
return false;
}
// removes expired sessions.
public function gc($expires = null) {
return Cache::gc($this->cacheKey) && parent::gc($expires);
}
}
?>
Output Error:
Fatal error: Class CartSession contains 2 abstract methods and must therefore be declared abstract or implement the remaining methods (CakeSessionHandlerInterface::open, CakeSessionHandlerInterface::close) in /Users/user/Sites/app/shop/Model/Datasource/Session/CartSession.php on line 43
I did added in core.php:
Configure::write('Session', array(
'defaults' => 'database',
'handler' => array(
'engine' => 'CartSession',
'model' => 'Session',
'cache' => 'apc'
)
));
Cache::config('apc', array('Engine' => 'Apc'));

Answer 1

You need to extend DatabaseSession. So your class declaration will look like:
class CartSession extends DatabaseSession implements CakeSessionHandlerInterface