Agurken/Check.php

## Check.php
<?php
// Part of the Login template for the SONI projekt
//
// Check.php
// Page for checking for errors
// Copyright Niclas Mølby 2010

// Include the needed files

// Including the Database.php file for database requests
include("Database.php");

// Including the Error.php file for error settings
include("Error.php");

// The Check class
class Check {

	// Function that find any errors in login perform
	function TryLogin($username, $password){
		global $Errors, $Database;

		// Set the varibel that counts the errors
		$Error = 0;

		// Test if username is empty
		if(strlen($username) < 1 && $username == ""){
			$Errors->setError("Username", "The field is empty");
			$Error++;
		}

		// Test if username exist
		if($Database->CheckUsername($username) == 0 && strlen($username) > 0){
			$Errors->setError("Username", "The username don't exist");
			$Error++;
		}

		// Test if password is empty
		if(strlen($password) < 1 && $password == ""){
			$Errors->setError("Password", "The field is empty");
			$Error++;
		}

		// Test if password is right
		if(strlen($username) > 0 && strlen($password) > 0 && $Database->WrongPass($username, $password) == 0){
			$Errors->setError("Password", "Wrong password!");
			$Error++;
		}

		// If there are errors, set the amount
		if($Error > 0){
			$Errors->ErrorAmount($Error);
		}

		return $Error;
	}

};
// Intialize a new Check class
$Check = new Check;


?>

## Database.php
<?php
// Part of the Login template for the SONI projekt
//
// Database.php
// Page for almost all database request.
// Copyright Niclas Mølby 2010

// Database class
class Database{

	// Function that handle the connection for the database
	function Connect(){
		$Connect = mysql_connect("localhost", "root", "");
		mysql_select_db("Blog", $Connect);
	}

	// Check if requested name is taken
	function CheckUsername($name){
		// Connect to database
		$this->Connect();

		// Request for any users with that name
		$Query = mysql_query("SELECT * FROM user WHERE username='$name'");

		// Return the result
		return mysql_num_rows($Query);
	}

	// Test if username and password fits together
	function WrongPass($username, $password){
		// Connect to database
		$this->Connect();

		// Request for any users with that name and pass
		$Query = mysql_query("SELECT * FROM user WHERE username='$username' AND password='$password'");

		// Return the result
		return mysql_num_rows($Query);
	}


}
// Intialize a new Database class request
$Database = new Database;

?>

## index.php
<?php
// Start the session
session_start();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>SONI login</title>
</head>

<body>

<?php
// If logged in, show it
if($_SESSION['logged_in']){
	echo "<h2>You are now logged in!</h2>";
	echo "Welcome: ".$_SESSION['username']."<br /><br />";
	echo "<a href=\"Logout.php\">Log out!</a>";
}
// Otherwise show a login form
else {
?>
<h1>Login</h1>
<form action="Process.php" method="post">
<table>
	<tr>
    	<td colspan="3">
        <span style="color:#F00; font-size:14px;"><?php echo $_SESSION['ErrNum']; ?></span>
        </td>
    </tr>
    <tr>
    	<td>
Username:</td> <td><input type="text" name="Username" /></td><td><span style="color:#F00; font-size:12px;"><?php echo $_SESSION['Username']; ?></span></td></tr>
	<tr>
    	<td>
Password:</td> <td><input type="password" name="Password" /></td><td><span style="color:#F00; font-size:12px;"><?php echo $_SESSION['Password']; ?></span></td></tr>
	<tr>
    	<td>
<input type="hidden" name="Login" value="1" />
<input type="submit" value="Login!" />
		</td>
	</tr>
</table>
</form>
<?php
}
?>

</body>
</html>
<?php
unset($_SESSION['Username']);
unset($_SESSION['Password']);
unset($_SESSION['ErrNum']);
?>

## Logout.php
<?php
// Part of the Login template for the SONI projekt
//
// Logout.php
// Page for logging out, and destroy the required sessions
// Copyright Niclas Mølby 2010

// Start the session
session_start();

// Destroy required sessions
unset($_SESSION['logged_in']);
unset($_SESSION['username']);

// Get back to login page
header("Location: index.php");
?>

## Process.php
<?php
// Part of the Login template for the SONI projekt
//
// Process.php
// Page for processing all request such as add comment, login and so on.
// Copyright Niclas Mølby 2010

// Include the needed files

// Including the Check.php file for error checking
include("Include/Check.php");

// The Process class
class Process {


	// Function that handle comment add requests
	function Login($username, $password){
		global $Check;

		// Testing if login contain errors
		$Try = $Check->TryLogin($username, $password);

		// If no errors perform login
		if($Try == 0){
			$_SESSION['logged_in'] = 1;
			$_SESSION['username'] = $username;
		}

		// Return to the right page
		header("Location: index.php");
	}

};
// Intialize a new Process
$Process = new Process;

// Action variabel for know what to do
$Action = $_POST['Login'];

// If action is login start the process
if(isset($Action)){
	$Process->Login($_POST['Username'], $_POST['Password']);
}

?>
	<?php
	// Part of the Login template for the SONI projekt
	//
	// Check.php
	// Page for checking for errors
	// Copyright Niclas Mølby 2010

	// Include the needed files

	// Including the Database.php file for database requests
	include("Database.php");

	// Including the Error.php file for error settings
	include("Error.php");

	// The Check class
	class Check {

	// Function that find any errors in login perform
	function TryLogin($username, $password){
	global $Errors, $Database;

	// Set the varibel that counts the errors
	$Error = 0;

	// Test if username is empty
	if(strlen($username) < 1 && $username == ""){
	$Errors->setError("Username", "The field is empty");
	$Error++;
	}

	// Test if username exist
	if($Database->CheckUsername($username) == 0 && strlen($username) > 0){
	$Errors->setError("Username", "The username don't exist");
	$Error++;
	}

	// Test if password is empty
	if(strlen($password) < 1 && $password == ""){
	$Errors->setError("Password", "The field is empty");
	$Error++;
	}

	// Test if password is right
	if(strlen($username) > 0 && strlen($password) > 0 && $Database->WrongPass($username, $password) == 0){
	$Errors->setError("Password", "Wrong password!");
	$Error++;
	}

	// If there are errors, set the amount
	if($Error > 0){
	$Errors->ErrorAmount($Error);
	}

	return $Error;
	}

	};
	// Intialize a new Check class
	$Check = new Check;




	?>
	<?php
	// Part of the Login template for the SONI projekt
	//
	// Database.php
	// Page for almost all database request.
	// Copyright Niclas Mølby 2010

	// Database class
	class Database{

	// Function that handle the connection for the database
	function Connect(){
	$Connect = mysql_connect("localhost", "root", "");
	mysql_select_db("Blog", $Connect);
	}

	// Check if requested name is taken
	function CheckUsername($name){
	// Connect to database
	$this->Connect();

	// Request for any users with that name
	$Query = mysql_query("SELECT * FROM user WHERE username='$name'");

	// Return the result
	return mysql_num_rows($Query);
	}

	// Test if username and password fits together
	function WrongPass($username, $password){
	// Connect to database
	$this->Connect();

	// Request for any users with that name and pass
	$Query = mysql_query("SELECT * FROM user WHERE username='$username' AND password='$password'");

	// Return the result
	return mysql_num_rows($Query);
	}


	}
	// Intialize a new Database class request
	$Database = new Database;

	?>
	<?php
	// Start the session
	session_start();
	?>
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<title>SONI login</title>
	</head>

	<body>

	<?php
	// If logged in, show it
	if($_SESSION['logged_in']){
	echo "<h2>You are now logged in!</h2>";
	echo "Welcome: ".$_SESSION['username']."<br /><br />";
	echo "<a href=\"Logout.php\">Log out!</a>";
	}
	// Otherwise show a login form
	else {
	?>
	<h1>Login</h1>
	<form action="Process.php" method="post">
	<table>
	<tr>
	<td colspan="3">
	<span style="color:#F00; font-size:14px;"><?php echo $_SESSION['ErrNum']; ?></span>
	</td>
	</tr>
	<tr>
	<td>
	Username:</td> <td><input type="text" name="Username" /></td><td><span style="color:#F00; font-size:12px;"><?php echo $_SESSION['Username']; ?></span></td></tr>
	<tr>
	<td>
	Password:</td> <td><input type="password" name="Password" /></td><td><span style="color:#F00; font-size:12px;"><?php echo $_SESSION['Password']; ?></span></td></tr>
	<tr>
	<td>
	<input type="hidden" name="Login" value="1" />
	<input type="submit" value="Login!" />
	</td>
	</tr>
	</table>
	</form>
	<?php
	}
	?>

	</body>
	</html>
	<?php
	unset($_SESSION['Username']);
	unset($_SESSION['Password']);
	unset($_SESSION['ErrNum']);
	?>
	<?php
	// Part of the Login template for the SONI projekt
	//
	// Logout.php
	// Page for logging out, and destroy the required sessions
	// Copyright Niclas Mølby 2010

	// Start the session
	session_start();

	// Destroy required sessions
	unset($_SESSION['logged_in']);
	unset($_SESSION['username']);

	// Get back to login page
	header("Location: index.php");
	?>
	<?php
	// Part of the Login template for the SONI projekt
	//
	// Process.php
	// Page for processing all request such as add comment, login and so on.
	// Copyright Niclas Mølby 2010

	// Include the needed files

	// Including the Check.php file for error checking
	include("Include/Check.php");

	// The Process class
	class Process {


	// Function that handle comment add requests
	function Login($username, $password){
	global $Check;

	// Testing if login contain errors
	$Try = $Check->TryLogin($username, $password);

	// If no errors perform login
	if($Try == 0){
	$_SESSION['logged_in'] = 1;
	$_SESSION['username'] = $username;
	}

	// Return to the right page
	header("Location: index.php");
	}

	};
	// Intialize a new Process
	$Process = new Process;

	// Action variabel for know what to do
	$Action = $_POST['Login'];

	// If action is login start the process
	if(isset($Action)){
	$Process->Login($_POST['Username'], $_POST['Password']);
	}

	?>