login.php

来自「这是php编的论坛的原代码」· PHP 代码 · 共 229 行

<?php
/***************************************************************************
 *                                login.php
 *                            -------------------
 *   begin                : Saturday, Feb 13, 2001
 *   copyright            : (C) 2001 The phpBB Group
 *   email                : [e-mail]
 *
 *   $Id: login.php,v 1.1.1.1 2003/02/11 22:27:27 wei.gao Exp $
 *
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 ***************************************************************************/

//
// Allow people to reach login page if
// board is shut down
//
define("IN_LOGIN", true);

define('IN_PHPBB', true);
$phpbb_root_path = './';
include($phpbb_root_path . 'extension.inc');
include($phpbb_root_path . 'common.'.$phpEx);

//
// Set page ID for session management
//
$userdata = session_pagestart($user_ip, PAGE_LOGIN);
init_userprefs($userdata);
//
// End session management
//

// session id check
if (!empty($HTTP_POST_VARS['sid']) || !empty($HTTP_GET_VARS['sid']))
{
	$sid = (!empty($HTTP_POST_VARS['sid'])) ? $HTTP_POST_VARS['sid'] : $HTTP_GET_VARS['sid'];
}
else
{
	$sid = '';
}

if( isset($HTTP_POST_VARS['login']) || isset($HTTP_GET_VARS['login']) || isset($HTTP_POST_VARS['logout']) || isset($HTTP_GET_VARS['logout']) )
{
	if( ( isset($HTTP_POST_VARS['login']) || isset($HTTP_GET_VARS['login']) ) && !$userdata['session_logged_in'] )
	{
		$username = isset($HTTP_POST_VARS['username']) ? $HTTP_POST_VARS['username'] : '';
		$password = isset($HTTP_POST_VARS['password']) ? $HTTP_POST_VARS['password'] : '';

		$sql = "SELECT user_id, username, user_password, user_active, user_level
			FROM " . USERS_TABLE . "
			WHERE username = '" . str_replace("\'", "''", $username) . "'";
		if ( !($result = $db->sql_query($sql)) )
		{
			message_die(GENERAL_ERROR, 'Error in obtaining userdata', '', __LINE__, __FILE__, $sql);
		}

		if( $row = $db->sql_fetchrow($result) )
		{
			if( $row['user_level'] != ADMIN && $board_config['board_disable'] )
			{
				redirect(append_sid("index.$phpEx", true));
			}
			else
			{
				if( md5($password) == $row['user_password'] && $row['user_active'] )
				{
					$autologin = ( isset($HTTP_POST_VARS['autologin']) ) ? TRUE : 0;

					$session_id = session_begin($row['user_id'], $user_ip, PAGE_INDEX, FALSE, $autologin);

					if( $session_id )
					{
						$url = ( !empty($HTTP_POST_VARS['redirect']) ) ? $HTTP_POST_VARS['redirect'] : "index.$phpEx";
						redirect(append_sid($url, true));
					}
					else
					{
						message_die(CRITICAL_ERROR, "Couldn't start session : login", "", __LINE__, __FILE__);
					}
				}
				else
				{
					$redirect = ( !empty($HTTP_POST_VARS['redirect']) ) ? $HTTP_POST_VARS['redirect'] : '';
					$redirect = str_replace("?", "&", $redirect);

					$template->assign_vars(array(
						'META' => '<meta http-equiv="refresh" content="3;url=' . "login.$phpEx?redirect=$redirect&amp;sid=" . $userdata['session_id'] . '">')
					);

					$message = $lang['Error_login'] . '<br /><br />' . sprintf($lang['Click_return_login'], '<a href="' . "login.$phpEx?redirect=$redirect&amp;sid=" . $userdata['session_id'] . '">', '</a>') . '<br /><br />' .  sprintf($lang['Click_return_index'], '<a href="' . append_sid("index.$phpEx") . '">', '</a>');

					message_die(GENERAL_MESSAGE, $message);
				}
			}
		}
		else
		{
			$redirect = ( !empty($HTTP_POST_VARS['redirect']) ) ? $HTTP_POST_VARS['redirect'] : "";
			$redirect = str_replace("?", "&", $redirect);

			$template->assign_vars(array(
				'META' => '<meta http-equiv="refresh" content="3;url=' . "login.$phpEx?redirect=$redirect&amp;sid=" . $userdata['session_id'] . '">')
			);

			$message = $lang['Error_login'] . '<br /><br />' . sprintf($lang['Click_return_login'], '<a href="' . "login.$phpEx?redirect=$redirect&amp;sid=" . $userdata['session_id'] . '">', '</a>') . '<br /><br />' .  sprintf($lang['Click_return_index'], '<a href="' . append_sid("index.$phpEx") . '">', '</a>');

			message_die(GENERAL_MESSAGE, $message);
		}
	}
	else if( ( isset($HTTP_GET_VARS['logout']) || isset($HTTP_POST_VARS['logout']) ) && $userdata['session_logged_in'] )
	{
		// session id check
		if ($sid == '' || $sid != $userdata['session_id'])
		{
			message_die(GENERAL_ERROR, 'Invalid_session');
		}

		if( $userdata['session_logged_in'] )
		{
			session_end($userdata['session_id'], $userdata['user_id']);
		}

		if (!empty($HTTP_POST_VARS['redirect']) || !empty($HTTP_GET_VARS['redirect']))
		{
			$url = (!empty($HTTP_POST_VARS['redirect'])) ? $HTTP_POST_VARS['redirect'] : $HTTP_GET_VARS['redirect'];
			redirect(append_sid($url, true));
		}
		else
		{
			redirect(append_sid("index.$phpEx", true));
		}
	}
	else
	{
		$url = ( !empty($HTTP_POST_VARS['redirect']) ) ? $HTTP_POST_VARS['redirect'] : "index.$phpEx";
		redirect(append_sid($url, true));
	}
}
else
{
	//
	// Do a full login page dohickey if
	// user not already logged in
	//
	if( !$userdata['session_logged_in'] )
	{
		$page_title = $lang['Login'];
		include($phpbb_root_path . 'includes/page_header.'.$phpEx);

		$template->set_filenames(array(
			'body' => 'login_body.tpl')
		);

		if( isset($HTTP_POST_VARS['redirect']) || isset($HTTP_GET_VARS['redirect']) )
		{
			$forward_to = $HTTP_SERVER_VARS['QUERY_STRING'];

			if( preg_match("/^redirect=([a-z0-9\.#\/\?&=\+\-_]+)/si", $forward_to, $forward_matches) )
			{
				$forward_to = ( !empty($forward_matches[3]) ) ? $forward_matches[3] : $forward_matches[1];
				$forward_match = explode('&', $forward_to);

				if(count($forward_match) > 1)
				{
					$forward_page = '';

					for($i = 1; $i < count($forward_match); $i++)
					{
						if( !ereg("sid=", $forward_match[$i]) )
						{
							if( $forward_page != '' )
							{
								$forward_page .= '&';
							}
							$forward_page .= $forward_match[$i];
						}
					}
					$forward_page = $forward_match[0] . '?' . $forward_page;
				}
				else
				{
					$forward_page = $forward_match[0];
				}
			}
		}
		else
		{
			$forward_page = '';
		}

		$username = ( $userdata['user_id'] != ANONYMOUS ) ? $userdata['username'] : '';

		$s_hidden_fields = '<input type="hidden" name="sid" value="' . $userdata['session_id'] . '" /><input type="hidden" name="redirect" value="' . $forward_page . '" />';

		make_jumpbox('viewforum.'.$phpEx, $forum_id);
		$template->assign_vars(array(
			'USERNAME' => $username,

			'L_ENTER_PASSWORD' => $lang['Enter_password'],
			'L_SEND_PASSWORD' => $lang['Forgotten_password'],

			'U_SEND_PASSWORD' => append_sid("profile.$phpEx?mode=sendpassword"),

			'S_HIDDEN_FIELDS' => $s_hidden_fields)
		);

		$template->pparse('body');

		include($phpbb_root_path . 'includes/page_tail.'.$phpEx);
	}
	else
	{
		redirect(append_sid("index.$phpEx", true));
	}

}

?>