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Красивые формы авторизации. Форма входа и регистрации с помощью HTML5 и CSS3. Стилизуем формы, используя CSS3
Bitwarden 1 16 6 cm. This is in continuation of the tutorial on making a membership based web site. Please see the previous page for more details.
Download the code
You can download the whole source code for the registration/login system from the link below:
The ReadMe.txt file in the download contains detailed instructions.
The login form
Here is the HTML code for the login form.
Logging in
We verify the username and the password we received and then look up those in the database. Here is the code:
function Login(){ if(empty($_POST['username'])) { $this->HandleError('UserName is empty!'); return false; } if(empty($_POST['password'])) { $this->HandleError('Password is empty!'); return false; } $username = trim($_POST['username']); $password = trim($_POST['password']); if(!$this->CheckLoginInDB($username,$password)) { return false; } session_start(); $_SESSION[$this->GetLoginSessionVar()] = $username; return true;}
In order to identify a user as authorized, we are going to check the database for his combination of username/password, and if a correct combination was entered, we set a session variable.
Here is the code to look up the username and password.
function CheckLoginInDB($username,$password){ if(!$this->DBLogin()) { $this->HandleError('Database login failed!'); return false; } $username = $this->SanitizeForSQL($username); $pwdmd5 = md5($password); $qry = 'Select name, email from $this->tablename '. ' where username='$username' and password='$pwdmd5' '. ' and confirmcode='y'; $result = mysql_query($qry,$this->connection); if(!$result || mysql_num_rows($result) <= 0) { $this->HandleError('Error logging in. '. 'The username or password does not match'); return false; } return true;}
Please notice that we must compare the value for the password from the database with the MD5 encrypted value of the password entered by the user. If the query returns a result, we set an 'authorized' session variable, and then redirect to the protected content. If there are no rows with the entered data, we just redirect the user to the login form again.
Access controlled pages
For those pages that can only be accessed by registered members, we need to put a check on the top of the page.
Notice that we are setting an 'authorized' session variable in the login code above. On top of pages we want to protect, we check for that session variable. If user is authorized, we show him the protected content, otherwise we direct him to the login form.
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Include this sample piece of code on top of your protected pages:
CheckLogin()){ $fgmembersite->RedirectToURL('login.php'); exit;}?>
See the file: access-controlled.php in the downloaded code for an example.
Here is the CheckLogin() function code.
function CheckLogin(){ session_start(); $sessionvar = $this->GetLoginSessionVar(); if(empty($_SESSION[$sessionvar])) { return false; } return true;}
These are the basics of creating a membership site. Now that you have the basic knowledge, you can experiment with it and add new features, such as a 'Forgot password' page to allow the user to retrieve or change his password if he forgets it.
Updates
9th Jan 2012
Reset Password/Change Password features are added.
The code is now shared at GitHub .
License
The code is shared under LGPL license. You can freely use it on commercial or non-commercial websites.
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Поле для ввода пароля - обычное текстовое поле, вводимый текст в котором в зависимости от браузера отображается звёздочками или точками. Такая особенность предназначена для того, чтобы никто не подглядел вводимый пароль. Хотя вводимый текст и не показывается на экране, на сервер введённая информация передаётся в открытом виде без шифрования. Поэтому использование этого поля не обеспечивает безопасности данных и их можно перехватить.
Синтаксис создания следующий.
Атрибуты совпадают с атрибутами текстового поля и перечислены в табл. 1.
Поле для пароля нашло широкое применение на сайтах для авторизации пользователей и разграничения доступа к разделам сайта, где требуется подтвердить свои полномочия. В примере 1 показано, как создавать подобные поля.
Пример 1. Cinema grade pro 1 1 3 – color corrector. Поле с паролем
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Поле с паролем
