Complete Login And Registration System - doesn't use mysql!

[SIZE=5][FONT=Courier]<?php header("Content-type: text/html; charset=utf-8"); //Send to browser that the charset is utf-8 ?>

<?php

/* ******************************

  kLogin 0.1

******************************
*/

/* ****************************************

This Login script was created by
Juan Karlo Aquino de Guzman

DO NOT MODIFY THIS CODE AND DISTRIBUTING
IT WITHOUT ANY PERMISSION. E-MAIL THE
AUTHOR FIRST. Email: 01karlo@gmail.com

DO NOT REMOVE THE "POWERED BY".

FOR SUGGESTIONS, COMMENTS, ETC, SEND AN
EMAIL TO 01karlo@gmail.com

HOPE THAT YOU ENJOY THIS SCRIPT!

MY FRIENDSTER: karlo@*BLEEP*it.com

****************************************
*/

/* ******************************

Make sure that your editor supports WordWrap

******************************
*/

$ver = "0.1"; // Version of this script.
$info_text = "info.txt"; // "info.txt" filename. You can change this for security purposes. Example, you can store this on a folder named "users" with the filename "info.qwerty". Use "users/info.qwerty". The default is "info.txt" means it's located on the same directory where the script is located.

/* ******************************

 Login Please wait Page

******************************
*/

if($_POST[act]==="login") { // Checks if "act" is equal to "login"
$forms = '<input type="hidden" name="act" value="login_verify"><input type="hidden" name="username" value="'.$_POST[username].'"><input type="hidden" name="password" value="'.$_POST[password].'"><input type="submit" value="Continue" style="width: 125px; border: 1px solid black; background: White; cursor: pointer;">'; // Outputs the forms

die('<script language="javascript" type="text/javascript">document.write(\'<title>Please wait</title><div align="center"><div align="center" style="font-family: Verdana; font-size: 14px; font-weight: bold; color: White; background: #6699FF; width: 50%; border: 1px solid black; padding: 4px;">Please wait</div><div align="center" style="font-family: Verdana; font-size: 12px; font-weight: bold; color: Black; background: #99CCFF; width: 50%; border-bottom: 1px solid black; border-left: 1px solid black; border-right: 1px solid black; padding: 8px;">Please wait. Your <span style="color: red;">username</span> and <span style="color: red;">password</span> is now being verified by our unique and expensive server.<br><form method="post" action="'.$_SERVER[SCRIPT_NAME].'">'.$forms.'</form></div></div>\');</script>'); // Outputs the entire layout of the page
}

/* ******************************

 Login Verify Page

******************************
*/

if($_POST[act]==="login_verify") { // Checks if "act" is equal to "login_verify"
if(!file_exists("info.txt")) { // Check if the file exists
 die("<b>There are no registered users.</b>");
}

$login_info = "$_POST[username]/$_POST[password]"; // Gets the username and password entered by the user
$file_info = file_get_contents("info.txt"); // Gets the contents of the "info" file

if(strlen($_POST[username]) < 5 && strlen($_POST[password]) < 5) { // Checks the length of the username and password
 die("<b>The username and password must not be<br>less than 5 characters.</b>");
}

if(preg_match('/\\W/',$_POST[username])) { // Checks if the username is only letters and numbers
 die("<b>Login error! <a href=\"$_SERVER[SCRIPT_NAME]\" style=\"color: black;\">Go back</a>");
}

if(preg_match('/\\W/',$_POST[password])) { // Checks if the password is only letters and numbers
 die("<b>Login error! <a href=\"$_SERVER[SCRIPT_NAME]\" style=\"color: black;\">Go back</a>");
}

if(!strstr($file_info,$login_info)) { // Checks if the username and password is correct
 die("<b>Username and Password error!</b>");
}

header("Location: $_SERVER[SCRIPT_NAME]?login=".urlencode(base64_encode("$_POST[username]/$_POST[password]"))); // Redirects the user to the authenticated page
}

/* ******************************

 Authenticated Page

******************************
*/

if(isset($_GET[login])) { // Checks if "login" is set or is not empty
$login_info = urldecode(base64_decode($_GET[login])); // Decodes the "login" info on the address bar
$file_info = file_get_contents("info.txt"); // Gets the "info.txt" file

if(!strstr($file_info,$login_info)) { // Checks if the username and password are correct
 die("<b>Username and Password error!</b>"); // Outputs the error page
}

if(!strstr($_SERVER[HTTP_REFERER],$_SERVER[SCRIPT_NAME])) { // Checks if the klogin.php exists or yourscript.php exists in the referer header
 die("<b>You are currently trying to hack this website.</b>");
}

if(isset($_GET[go])) { // Checks if "go" is not empty or if it is set
 die("<b>You have clicked $_GET[go] link!<br>If you saw this message, it means that you are still authenticated. <a href=\"$_SERVER[HTTP_REFERER]\" style=\"color: black;\">Go Back</a></b>"); // Outputs the success message if the user entered another authenticated page
}

$split_username = split("/",$login_info); // Gets the username only

echo("<title>Authenticated Page - $split_username[0]</title><h2>Welcome to the Authenticated and Secured Area!</h2>"); // Greeting

$authenticate = "?login=".urlencode(base64_encode($login_info)); // Decodes the login information from the "login=" on the address bar

for($i=1; $i<101; $i++) { // Outputs the links. You can check "101" to any number. Example, you want 500, use 501
echo("<b><a href=\"$authenticate&go=sample$i\" style=\"color: blue;\">Link$i</a></b><br>"); // Outputs the links
}
echo("<br><a href=\"$_SERVER[SCRIPT_NAME]\" style=\"color: red; font-weight: bold;\">Logout</a>");
exit; // Don't parse the existing script
}

/* ******************************

  Register Page

******************************
*/

if($_GET[act]==="register") { // Outputs the register page
?>
<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta name="generator" content="EditPlus">
<meta name="keywords" content="juan, karlo, aquino, de, guzman, roosevelt, cainta, lamuan, google, trap17, the real host, omega, kshoutbox, klogin">
<meta name="description" content="kLogin version <?=$ver;?>">
<meta name="Author" content="Juan Karlo Aquino de Guzman">
<title>User Registration</title>
<?if(preg_match("/MSIE/",$_SERVER[HTTP_USER_AGENT])){echo('<script src="/ie7/ie7-standard.js" type="text/javascript"></script>');} //checks if the user is using internet explorer, if the user is using it, then outputs the internet explorer script fix?>
<style type="text/css">
body { font-family: Verdana; font-size: 12px; font-weight: bold; color: Black; background: White; cursor: default; }
#banner { font-size: 14px; font-weight: bold; color: White; background: #6666CC; border-bottom: 1px solid black; border-left: 1px solid black; border-right: 1px solid black; border-top: 1px solid black; width: 50%; padding-left: 8px; padding-right: 8px; padding-top: 4px; padding-bottom: 4px; }
#message { background: #FFFFCC; border-left: 1px solid black; border-right: 1px solid black; border-bottom: 1px solid black; width: 50%; padding: 8px; }
submit { width: 25%; }
</style>
</head>

<body>
<div align="center">
<div id="banner">Register</div>
<div id="message">
<form method="post" action="<?=$_SERVER[SCRIPT_NAME];?>">
<input type="hidden" name="act" value="registration">
Username: <input type="text" name="username" size="25"><br>
Password: <input type="password" name="password" size="25"><br>
<input type="submit" value="Register">
</form>
</div>
</div>
</body>
</html>
<?php
exit;
}

/* ******************************

  Registeration

******************************
*/

if($_POST[act]==="registration") { // Checks if "act" is set to "registration"
$login_info = "$_POST[username]/$_POST[password]"; // Gets the user's username and password
$file_info = file_get_contents("info.txt"); // Gets the "info.txt" file

if(strlen($_POST[username]) < 5 && strlen($_POST[password]) < 5) { // Checks if the length of the username and password are greater than 5
 die("<b>The username and password must not be<br>less than 5 characters.</b>");
}

if(preg_match('/\\W/',$_POST[username])) { // Checks if the username's characters are only letters and numbers
 die("<b>Register error! <a href=\"$_SERVER[SCRIPT_NAME]?act=register\" style=\"color: black;\">Go back</a>");
}

if(preg_match('/\\W/',$_POST[password])) { // Checks if the password's characters are only letters and numbers
 die("<b>Register error! <a href=\"$_SERVER[SCRIPT_NAME]?act=register\" style=\"color: black;\">Go back</a>");
}

if(strstr($file_info,$login_info)) { // Check if the username and password are correct
 die("<b>Username and Password is already registered! <a href=\"$_SERVER[SCRIPT_NAME]?act=register\" style=\"color: black;\">Go back</a></b>");
}

if(strlen($file_info)<1) { // Checks the length of the file
 $f = fopen("info.txt","w+"); // Opens the file
 fwrite($f,"$_POST[username]/$_POST[password]"); // Writes the username and password
 fclose($f); // Closes the file
 chmod("info.txt",0666); // CHMOD the file
 die('<b>You are now registered! <a href="'.$_SERVER[SCRIPT_NAME].'?login='.urlencode(base64_encode("$_POST[username]/$_POST[password]")).'" style="color: blue;">Click here to login.</a></b>'); // Outputs the you are now registered message
}

else {
 $f = fopen("info.txt","a+"); // Opens the file
 fwrite($f,"\n$_POST[username]/$_POST[password]"); // Writes the username and password
 fclose($f); // Closes the file
 chmod("info.txt",0666); // CHMOD the file
 die('<b>You are now registered! <a href="'.$_SERVER[SCRIPT_NAME].'?login='.urlencode(base64_encode("$_POST[username]/$_POST[password]")).'" style="color: blue;">Click here to login.</a></b>'); // Outputs the you are now registered message
}

header("Location: $_SERVER[SCRIPT_NAME]?login=".urlencode(base64_encode("$_POST[username]/$_POST[password]"))); // Redirects the user to the authenticated page
}

?>
<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta name="generator" content="EditPlus">
<meta name="keywords" content="juan, karlo, aquino, de, guzman, roosevelt, cainta, lamuan, google, trap17, the real host, omega, kshoutbox, klogin">
<meta name="description" content="kLogin version <?=$ver;?>">
<meta name="Author" content="Juan Karlo Aquino de Guzman">
<title>User Login</title>
<?if(preg_match("/MSIE/",$_SERVER[HTTP_USER_AGENT])){echo('<script src="/ie7/ie7-standard.js" type="text/javascript"></script>');} //checks if the user is using internet explorer, if the user is using it, then outputs the internet explorer script fix?>
<style type="text/css">
body { font-family: Verdana; font-size: 12px; font-weight: bold; color: Black; background: White; cursor: default; }
#banner { font-size: 14px; font-weight: bold; color: White; background: #6666CC; border-bottom: 1px solid black; border-left: 1px solid black; border-right: 1px solid black; border-top: 1px solid black; width: 50%; padding-left: 8px; padding-right: 8px; padding-top: 4px; padding-bottom: 4px; }
#message { background: #FFFFCC; border-left: 1px solid black; border-right: 1px solid black; border-bottom: 1px solid black; width: 50%; padding: 8px; }
submit { width: 25%; }
</style>
</head>

<body>
<div align="center">
<div id="banner">Login</div>
<div id="message">
<form method="post" action="<?=$_SERVER[SCRIPT_NAME];?>">
<input type="hidden" name="act" value="login">
Username: <input type="text" name="username" size="25"><br>
Password: <input type="password" name="password" size="25"><br>
<input type="submit" value="Login">
</form>
Don't have an account? <a href="?act=register" style="color: black;">Click here</a> to Register!
<?php
/* ******************************

 Number of Users

******************************
*/
$split_file = file_get_contents("info.txt"); // Gets the file "info.txt"
$split = split('\n',$split_file); // Find the "\n" and split it. If you don't know what "\n" means, go to http://www.google.com/search?q=What+is+\n?
$counter = count($split); // Counts the splitted string
if(count($split)===13) { // If it's 13
$counter = '<span style="color: red; font-weight: bold;" onmouseover="window.status=\'BAD LUCK!\';" onmouseout="window.status=\'\';">13</span>'; // Outputs that it is a BAD LUCK number
}
if(count($split) > 0) { // If the split is greater than zero
echo("<br><br><span style=\"font-size: 10px;\">There are currently ".$counter." registered users</span>");
}
?>
</div>
<!-- Do not remove this. Or else, you are violating the License Agreement -->
<br><b><a href="http://www.karlo.ph.tc" style="text-decoration: none; color: #EAEAEA; font-size: 10px;" target="_blank">Powered by kLogin 0.1<br>created by Juan Karlo Aquino de Guzman</a></b>
<!-- Do not remove this. Or else, you are violating the License Agreement -->
</div>
</body>
</html>[/FONT][/SIZE]