Esempio n. 1
0
 /**
  * Sets an fCache object to store sessions in
  * 
  * While any type of fCache backend should technically work, it would be
  * unwise to use the `file` and `directory` types. The `file` caching
  * backend stores all values in a single file, which would quickly become a
  * performance bottleneck and could cause data loss with many concurrent
  * users. The `directory` caching backend would not make sense since it is
  * the same general functionality as the default session handler, but it
  * would be slightly slower since it is written in PHP and not C.
  *
  * It is recommended to set the `serializer` and `unserializer` `$config`
  * settings on the fCache object to `string` for the best performance and
  * minimal storage space.
  *
  * For better performance, check out using the built-in session handlers
  * that are bundled with the following extensions:
  *
  *  - [http://php.net/memcached.sessions memcached]
  *  - [http://php.net/memcache.examples-overview#example-3596 memcache]
  *  - [https://github.com/nicolasff/phpredis redis]
  *
  * The [http://pecl.php.net/package/igbinary igbinary] extension can
  * provide even more of a performance boost by storing serialized data in
  * binary format instead of as text.
  * 
  * @param  fCache $backend     An fCache object to store session values in
  * @param  string $key_prefix  A prefix to add to all session IDs before storing them in the cache
  * @return void
  */
 public static function setBackend($backend, $key_prefix = '')
 {
     if (self::$open || isset($_SESSION)) {
         throw new fProgrammerException('%1$s must be called before any of %2$s, %3$s, %4$s, %5$s, %6$s, %7$s or %8$s', __CLASS__ . '::setLength()', __CLASS__ . '::add()', __CLASS__ . '::clear()', __CLASS__ . '::enablePersistence()', __CLASS__ . '::get()', __CLASS__ . '::open()', __CLASS__ . '::set()', 'session_start()');
     }
     self::$old_session_module_name = session_module_name();
     self::$backend = $backend;
     self::$key_prefix = $key_prefix;
     session_set_save_handler(array('fSession', 'openCache'), array('fSession', 'closeCache'), array('fSession', 'readCache'), array('fSession', 'writeCache'), array('fSession', 'destroyCache'), array('fSession', 'gcCache'));
     // This ensures the session is closed before the fCache object is destructed
     register_shutdown_function(array('fSession', 'close'));
 }