Premettendo che non capisco nulla (o quasi)di php, ho provato a creare un'area protetta nel mio sito.
Ho trovato e scaricato uno script facile da configurare e da usare:
(FUNZIONAVA TUTTO FINO A IERI SERA)
PHPPageProtect
V 1.0.0
Copyright 2002
David Broker
http://php.warpedweb.net/
tutto ok fino ad oggi quando inizio a ricevere telefonate da parte di amici i quali mi riferivano che collegandosi al sito, quando tentano di accedere alla pagina del login invece della form dove inserive login e pwd .......
SPUNTA IL CODICE!!!!!!!!!!!!!!!!! 
VVoVe: VVoVe: VVoVe:
ecco che spuntaaaaaaaaaaaaaaa:
il sito è: www.fabiovalvo.it
Codice PHP:
<?php
/////////////////////////////////////////////////////
// //
// PHPPageProtect //
// V 1.0.0 //
// //
// Copyright 2001 //
// David Broker //
// [email]php@warpedweb.net[/email] //
// All Rights Reserved //
// //
// In using this script you //
// agree to the following: //
// //
// This script may be used and modified //
// freely as long as this //
// copyright remains intact. //
// //
// You may not distibute this script, or //
// any modifications of it. //
// //
// A link must be provided on the website that //
// uses the script to: //
// [url]http://php.warpedweb.net/[/url] //
// //
// Any breaches of these conditions //
// will result in legal action. //
// //
// This script is distributed with //
// no warrenty, free of charge. //
// //
/////////////////////////////////////////////////////
// Variables
// Path to the config file.
$config = "conf.php";
// End Variables
// Load config file.
require($config);
// Initial File checks to make sure the files exist before using them.
if(!file_exists($user_data)) {
echo "<h1 align=\"center\">$user_data_file_not_exist</h1>";
exit;
}
elseif(!is_readable($user_data)) {
echo "<h1 align=\"center\">$user_data_file_not_readable</h1>";
exit;
}
elseif($log_login) {
if(!file_exists($log_file)) {
echo "<h1 align=\"center\">$log_file_not_exist</h1>";
exit;
}
elseif(!is_writable($log_file)) {
echo "<h1 align=\"center\">$log_file_not_writable</h1>";
exit;
}
}
// Perform operation according to command:
switch ($cmd) {
case "login":
if(check_user($username, $password, $name, $log_login)) {
session_start("pageprotect");
session_register('valid');
session_register('username');
session_register('name');
// Uses MD5 and soundex to encode "valid" var to avoid easy access.
$valid = strrev(soundex(name).md5($username));
if ($log_login) {
$fd = @fopen($log_file, "a");
fputs($fd, time()."|$name|$username\n");
fclose($fd);
}
header("Location: $first_page?".SID);
exit;
} else {
header("location: $login_page?cmd=invalid");
exit;
}
break;
case "unauth":
session_start("pageprotect");
session_destroy();
print_header();
echo "<h3 align=\"center\">$unauthorised[/i]</h3>";
print_login();
print_footer();
break;
case "invalid":
print_header();
echo "<h3 align=\"center\">$invalid_username_password[/i]</h3>";
print_login($username);
print_footer();
break;
case "logout":
session_start("pageprotect");
session_destroy();
print_header();
echo "<h3 align=\"center\">$logged_out[/i]</h3>";
print_login($username);
print_footer();
break;
default:
print_header();
print_login($username);
print_footer();
break;
}
function print_header() {
// Prints the header of the page.
echo "<html><head><title>Login</title></head><body style=\"font-family:arial;\">";
}
function print_footer() {
// Prints the footer of the page.
echo "<div align=\"center\">
<font size=\"2\">Pagine protette da:
[b]PHPPageProtect[/b]</font>
</div></body></html>";
}
function check_user($username, $password, &$name, &$log) {
// Checks to see the user is valid.
if(($username == $GLOBALS[admin_username]) && ($password == $GLOBALS[admin_password])) {
$name = "Administrator";
$log = false;
return true;
}
else {
$file = @file($GLOBALS[user_data]);
$pw = md5($password);
$valid = false;
if(is_array($file)) {
foreach($file as $user) {
$dat = explode("|", $user);
if($username==$dat[0] && $pw == trim($dat[2])) {
$valid = true;
$name = $dat[1];
}
}
}
return $valid;
}
}
function print_login($username='') {
// Prints the login form.
echo "
<h2 align=\"center\">[i]$GLOBALS[user_login][/i]</h2>
<form method=\"post\" action=\"$GLOBALS[SCRIPT_NAME]\">
<input type=\"hidden\" name=\"cmd\" value=\"login\">
<table align=\"center\">
<tr><td>Username:</td><td><input type=\"text\" name=\"username\" value=\"$username\"></td></tr>
<tr><td>Password:</td><td><input type=\"password\" name=\"password\"></td></tr>
<tr><td colspan=\"2\" align=\"center\"><input type=\"submit\" value=\"Login\"></td></tr></table></form>";
}
?>
<style type="text/css">
a { color:black; text-decoration: None; }
a:hover { color: red; text-decoration: None; }
</style>
<center>
<font = verdana size =2>
[url="http://www.fabiovalvo.it"]..:indietro:..[/url]
</center>
</font>
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