Links zonder Mysql

-----------------
links.inc.php
-----------------

<?php

/*
*
*@file: links.inc.php
*@version: 2.1 [26-02-2006]
*@auteur: Boaz den Besten
*@www: www.n3rd.nl
*@omschrijving:
* een links systeem zonder MySQL
* variabele: user een username om mee in te loggen
* variabele: pass een password om mee in te loggen
* variabele: file het bestand waar de links in opgeslagen worden.
* functie: read_csv een functie om een csv bestand in een array te zetten
* functie: addlink een link toevoegen
* functie: new_file maakt het bestand leeg
* functie: login_do inlog gegeven checken en inloggen
* functie: login_check inlog gegeven checken
*
*/

class csv{

	var $user = 'username';
	var $pass = 'password';
	var $file = 'links.csv';

	function read_csv(){
		$data = array();
		$file = file($this->file);
		foreach($file as $key => $value){
			$data[$key] = explode(';', trim($value));
		}
		return $data;
	}
	
	function addlink($addr, $name, $view=1){
		if(!empty($addr) && !empty($name) && !strpos($addr, ';') && !strpos($name, ';') && ($view==1||$view==0)){
			if(substr($addr, 0, 7) != 'http://'){
				$addr = 'http://' . $addr;
			}
			$addr = htmlentities(trim($addr), ENT_QUOTES);
			$name = htmlentities(trim($name), ENT_QUOTES);
			$file = fopen($this->file, 'a');
			fwrite($file, $view . ";" . substr($name, 0, 50) . ";" . substr($addr,0, 157) . "\r\n");
			fclose($file);
			return true;
		}else{
			return false;
		}
	}
	
	function new_file(){
		$file = fopen($this->file, 'w');
		fwrite($file, '');
		fclose($file);
	}
	
	function login_do($user, $pass, $rechten=1){
		if($user == $this->user && $pass == $this->pass){
			$_SESSION['user'] = $user;
			$_SESSION['pass'] = md5($pass);
			$_SESSION['rechten'] = $rechten;
			$_SESSION['client_ip'] = $_SERVER['REMOTE_ADDR'];
			return true;
		}else{
			return false;
		}
	}
	
	function login_check($rechten=1){
		if(!isset($_SESSION['user']) || !isset($_SESSION['pass']) || !isset($_SESSION['rechten'])){
			return false;
		}else{
			if($_SESSION['user'] == $this->user && $_SESSION['pass'] == md5($this->pass) && $_SESSION['rechten'] >= $rechten && $_SESSION['client_ip'] == $_SERVER['REMOTE_ADDR']){
				return true;
			}else{
				return false;
			}
		}
	}
		
}

?>

-----------------
addlink.php
-----------------

<?php

include_once('links.inc.php');

$csv = new csv;

echo "<h1>Add a link</h1>\r\n";

if(isset($_POST['submit'])){
	if($csv->addlink($_POST['addr'], $_POST['name'])){
		echo "Thanks!\r\n";
	}else{
		echo "Your link could not be added.\r\n";
	}
}else{
	echo "<form method=\"post\" action=\"" . $_SERVER['PHP_SELF'] . "\">\r\n";
	echo "<p>Link name:<br /><input name=\"name\" type=\"text\" maxlength=\"50\" /></p>\r\n";
	echo "<p>Link adress:<br /><input name=\"addr\" type=\"text\" maxlength=\"150\" /></p>\r\n";
	echo "<input type=\"submit\" name=\"submit\" value=\"Submit\" />\r\n";
	echo "</form>\r\n";
}

echo "<br />\r\n";
echo "<a href=\"links.php\">Back</a>\r\n";

?>

-----------------
links.php
-----------------

<?php

include_once('links.inc.php');

$csv = new csv;

echo "<h1>Links</h1>\r\n";

foreach($csv->read_csv() as $link){
	if($link[0] == '1'){
		echo "<a href=\"" . $link[2] . "\">" . $link[1] . "</a><br />\r\n";
	}
}

echo "<br />\r\n<a href=\"addlink.php\">Add a link</a> - <a href=\"login.php\">Admin</a>";

?>

-----------------
login.php
-----------------

<?php

session_start();

if((!isset($_POST['username']) || !isset($_POST['password'])) && (!isset($_SESSION['user']) || !isset($_SESSION['pass']))){
	echo "<h1>Login</h1>\r\n";
	echo "<form method=\"post\" action=\"" . $_SERVER['PHP_SELF'] . "\">\r\n";
	echo "<p>Username<br /><input type=\"text\" name=\"username\" /></p>\r\n";
	echo "<p>Password<br /><input type=\"password\" name=\"password\" /></p>\r\n";
	echo "<input type=\"submit\" name=\"submit\" value=\"Submit\" />\r\n";
	echo "</form>\r\n";
}else{
	include_once('links.inc.php');
	
	$csv = new csv;
	
	if(isset($_SESSION['user']) && isset($_SESSION['pass']) && $csv->login_check()){
		header("location: admin.php");
	}else{
		if($csv->login_do($_POST['username'], $_POST['password'])){
			header("location: admin.php");
		}else{
			echo "Login failed!\r\n";
		}
	}
}

echo "<br />\r\n<a href=\"links.php\">Back</a>";

?>

-----------------
admin.php
-----------------

<?php

session_start();

include_once('links.inc.php');

$csv = new csv;

if(!$csv->login_check()){
	header("Location: login.php");
}

if(isset($_POST['submit'])){
	$csv->new_file();
	foreach($_POST['name'] as $key => $name){
		if(isset($_POST['view'][$key])){
			$view = 1;
		}else{
			$view = 0;
		}
		$csv->addlink($_POST['addr'][$key], $name, $view);
	}
}

if(isset($_POST['clear'])){
	$csv->new_file();
}

	echo "<h1>Admin</h1>\r\n";

	echo "<form method=\"post\" action=\"" . $_SERVER['PHP_SELF'] . "\">\r\n";


$i = 0;
foreach($csv->read_csv() as $link){

	echo "<input name=\"view[" . $i . "]\" type=\"checkbox\"";
	if($link[0] == 1){
		echo " checked=\"checked\"";
	}
	echo " />";
	
	echo " <input name=\"name[" . $i . "]\" type=\"text\" value=\"" . $link[1] . "\" maxlength=\"50\" />";
	echo " <input name=\"addr[" . $i . "]\" type=\"text\" value=\"" . $link[2] . "\" maxlength=\"150\" />";
	
	echo "<br />\r\n";
	$i++;
}

echo "<br />\r\n<input type=\"submit\" name=\"submit\" value=\"Submit\" /> <input type=\"submit\" name=\"clear\" value=\"Clear All\" />\r\n";

echo "</form>\r\n";

echo "<a href=\"loguit.php\">Logoff</a>\r\n";

?>

-----------------
loguit.php
-----------------

<?php

session_start();

session_destroy();

header("Location: login.php");

?>