PHP 登錄類

class Auth
{
var $user_id;
var $username;
var $password;
var $ok;
var $salt = "34asdf34";
var $domain = ".domain.com";

function Auth()
{
global $db;

$this->user_id = 0;
$this->username = "Guest";
$this->ok = false;

if(!$this->check_session()) $this->check_cookie();

return $this->ok;
}

function check_session()
{
if(!empty($_SESSION["auth_username"]) && !empty($_SESSION["auth_password"]))
return $this->check($_SESSION["auth_username"], $_SESSION["auth_password"]);
else
return false;
}

function check_cookie()
{
if(!empty($_COOKIE["auth_username"]) && !empty($_COOKIE["auth_password"]))
return $this->check($_COOKIE["auth_username"], $_COOKIE["auth_password"]);
else
return false;
}

function login($username, $password)
{
global $db;
$db->query("SELECT user_id FROM users WHERE username = "$username" AND password = "$password"");
if(mysql_num_rows($db->result) == 1)
{
$this->user_id = mysql_result($db->result, 0, 0);
$this->username = $username;
$this->ok = true;

$_SESSION["auth_username"] = $username;
$_SESSION["auth_password"] = md5($password . $this->salt);
setcookie("auth_username", $username, time()+60*60*24*30, "/", $this->domain);
setcookie("auth_password", md5($password . $this->salt), time()+60*60*24*30, "/", $this->domain);

return true;
}
return false;
}

function check($username, $password)
{
global $db;
$db->query("SELECT user_id, password FROM users WHERE username = "$username"");
if(mysql_num_rows($db->result) == 1)
{
$db_password = mysql_result($db->result, 0, 1);
if(md5($db_password . $this->salt) == $password)
{
$this->user_id = mysql_result($db->result, 0, 0);
$this->username = $username;
$this->ok = true;
return true;
}
}
return false;
}

function logout()
{
$this->user_id = 0;
$this->username = "Guest";
$this->ok = false;

$_SESSION["auth_username"] = "";
$_SESSION["auth_password"] = "";

setcookie("auth_username", "", time() - 3600, "/", $this->domain);
setcookie("auth_password", "", time() - 3600, "/", $this->domain);
}

}

喜歡這篇文章嗎？立刻分享出去讓更多人知道吧！