Session library not garbage collecting

If you are going with a CRON make a CRON script that execute Codeigniter's own gc.

This is a copy of Session_files_driver.php. I think you should execute that one instead.

PHP Code:

    /**
     * Garbage Collector
     *
     * Deletes expired sessions
     *
     * @param    int     $maxlifetime    Maximum lifetime of sessions
     * @return    bool
     */
    public function gc($maxlifetime)
    {
        if ( ! is_dir($this->_config['save_path']) OR ($directory = opendir($this->_config['save_path'])) === FALSE)
        {
            log_message('debug', "Session: Garbage collector couldn't list files under directory '".$this->_config['save_path']."'.");
            return $this->_failure;
        }

        $ts = time() - $maxlifetime;

        $pattern = ($this->_config['match_ip'] === TRUE)
            ? '[0-9a-f]{32}'
            : '';

        $pattern = sprintf(
            '#\A%s'.$pattern.$this->_sid_regexp.'\z#',
            preg_quote($this->_config['cookie_name'])
        );

        while (($file = readdir($directory)) !== FALSE)
        {
            // If the filename doesn't match this pattern, it's either not a session file or is not ours
            if ( ! preg_match($pattern, $file)
                OR ! is_file($this->_config['save_path'].DIRECTORY_SEPARATOR.$file)
                OR ($mtime = filemtime($this->_config['save_path'].DIRECTORY_SEPARATOR.$file)) === FALSE
                OR $mtime > $ts)
            {
                continue;
            }

            unlink($this->_config['save_path'].DIRECTORY_SEPARATOR.$file);
        }

        closedir($directory);

        return $this->_success;
    }