HTML / PHP LOGIN - session stored in MySQL database

Easy PHP script for HTML login. Users and sessions are securely stored in a MySQL database.
An example is available here: http://www.andlink.net/example/login_html-php-mysql/

HTML

Form for login:

<form action="login.php" method="post">
	<label for="uname">Username</label>
	<input type="text" placeholder="Enter Username" name="uname" required>			
	<label for="passw">Password</label>
	<input type="password" placeholder="Enter Password" name="passw" required>

	<button type="submit">Login</button>
</form>

Form for logout:

<form action="logout.php">			
	<button type="submit">Logout</button>
</form>

PHP

Login function

auth_login($_POST['uname'],$_POST['passw']);

Logout function

auth_logout();

MySQL database

TABLE session

Column Name	Type
uid	char(32)
iduser	int(11)
creation_date	datetime

TABLE user

Column Name	Type
iduser	int(11)
username	varchar(45)
password	varchar(32)