PHP Dosya Yöneticisi

<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * Code Igniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package        CodeIgniter
 * @author        Dariusz Debowczyk
 * @copyright    Copyright (c) 2006, D.Debowczyk
 * @license        http://www.codeignitor.com/user_guide/license.html
 * @link        http://www.codeigniter.com
 * @since        Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * Session class using native PHP session features and hardened against session fixation.
 *
 * @package        CodeIgniter
 * @subpackage    Libraries
 * @category    Sessions
 * @author        Dariusz Debowczyk
 * @link        http://www.codeigniter.com/user_guide/libraries/sessions.html
 */
class CI_Session
{
    var $session_id_ttl = 360; // session id time to live (TTL) in seconds
    var $flash_key = 'flash'; // prefix for "flash" variables (eg. flash:new:message)

function __construct()
    {
        log_message('debug', "Native Session Class Initialized");
        $this->_sess_run();
    }

/**
     * Regenerates session id
     */
    function regenerate_id()
    {
        // copy old session data, including its id
        $old_session_id = session_id();
        $old_session_data = $_SESSION;

// regenerate session id and store it
        session_regenerate_id();
        $new_session_id = session_id();

// switch to the old session and destroy its storage
        session_id($old_session_id);
        session_destroy();

// switch back to the new session id and send the cookie
        session_id($new_session_id);
        session_start();

// restore the old session data into the new session
        $_SESSION = $old_session_data;

// update the session creation time
        $_SESSION['regenerated'] = time();

// session_write_close() patch based on this thread
        // http://www.codeigniter.com/forums/viewthread/1624/
        // there is a question mark ?? as to side affects

// end the current session and store session data.
        session_write_close();
    }

/**
     * Destroys the session and erases session storage
     */
    function destroy()
    {
        unset($_SESSION);
        if (isset($_COOKIE[session_name()])) {
            setcookie(session_name(), '', time() - 42000, '/');
        }
        session_destroy();
    }

/**
     * Reads given session attribute value
     */
    function userdata($item)
    {
        if ($item == 'session_id') { //added for backward-compatibility
            return session_id();
        } else {
            return (!isset($_SESSION[$item])) ? false : $_SESSION[$item];
        }
    }

/**
     * Sets session attributes to the given values
     */
    function set_userdata($newdata = array(), $newval = '')
    {
        if (is_string($newdata)) {
            $newdata = array($newdata => $newval);
        }

if (count($newdata) > 0) {
            foreach ($newdata as $key => $val) {
                $_SESSION[$key] = $val;
            }
        }
    }

/**
     * Erases given session attributes
     */
    function unset_userdata($newdata = array())
    {
        if (is_string($newdata)) {
            $newdata = array($newdata => '');
        }

if (count($newdata) > 0) {
            foreach ($newdata as $key => $val) {
                unset($_SESSION[$key]);
            }
        }
    }

/**
     * Starts up the session system for current request
     */
    function _sess_run()
    {
        @session_start();

// check if session id needs regeneration
        if ($this->_session_id_expired()) {
            // regenerate session id (session data stays the
            // same, but old session storage is destroyed)
            $this->regenerate_id();
        }

// delete old flashdata (from last request)
        $this->_flashdata_sweep();

// mark all new flashdata as old (data will be deleted before next request)
        $this->_flashdata_mark();
    }

/**
     * Checks if session has expired
     */
    function _session_id_expired()
    {
        if (!isset($_SESSION['regenerated'])) {
            $_SESSION['regenerated'] = time();
            return false;
        }

$expiry_time = time() - $this->session_id_ttl;

if ($_SESSION['regenerated'] <= $expiry_time) {
            return true;
        }

return false;
    }

/**
     * Sets "flash" data which will be available only in next request (then it will
     * be deleted from session). You can use it to implement "Save succeeded" messages
     * after redirect.
     */
    function set_flashdata($key, $value)
    {
        $flash_key = $this->flash_key . ':new:' . $key;
        $this->set_userdata($flash_key, $value);
    }

/**
     * Keeps existing "flash" data available to next request.
     */
    function keep_flashdata($key)
    {
        $old_flash_key = $this->flash_key . ':old:' . $key;
        $value = $this->userdata($old_flash_key);

$new_flash_key = $this->flash_key . ':new:' . $key;
        $this->set_userdata($new_flash_key, $value);
    }

/**
     * Returns "flash" data for the given key.
     */
    function flashdata($key)
    {
        $flash_key = $this->flash_key . ':old:' . $key;
        return $this->userdata($flash_key);
    }

/**
     * PRIVATE: Internal method - marks "flash" session attributes as 'old'
     */
    function _flashdata_mark()
    {
        foreach ($_SESSION as $name => $value) {
            $parts = explode(':new:', $name);
            if (is_array($parts) && count($parts) == 2) {
                $new_name = $this->flash_key . ':old:' . $parts[1];
                $this->set_userdata($new_name, $value);
                $this->unset_userdata($name);
            }
        }
    }

/**
     * PRIVATE: Internal method - removes "flash" session marked as 'old'
     */
    function _flashdata_sweep()
    {
        foreach ($_SESSION as $name => $value) {
            $parts = explode(':old:', $name);
            if (is_array($parts) && count($parts) == 2 && $parts[0] == $this->flash_key) {
                $this->unset_userdata($name);
            }
        }
    }
}

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📁 PHP Dosya Yöneticisi

📝 Session.php

📝 Session.php

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