Add a sign-up feature to a flat file login script

Good day to you all,
I’m working on a flat file login script and I would like to add a sign-up feature to it with a email confirmation process.

Here is my code :

[code=php]
<?php
//sessions must be initialized prior to any output if output buffering if off
session_start();

//the list of files containing passwords
$files = array(
“pass.txt”,
“test/pass2.txt”,
“admin/pass3.txt”
);

//if list of users not set create a new array
if(!isset($_SESSION[‘users’]))
$_SESSION[‘users’] = array();

if(isset($_POST[‘username’]) && isset($_POST[‘password’])){

//need to remove slashes from POST if magic_quotes are on
if(get_magic_quotes_gpc()){
$_POST[‘username’] = stripslashes($_POST[‘username’]);
$_POST[‘password’] = stripslashes($_POST[‘password’]);
}

$userFound = false; //we need this to exit the loops
foreach($files as $file){ //loop every file in the $files array
if($fh = fopen($file, “r”)){
while(!feof($fh) && !$userFound){ //while not the end of the current file or the user was not found
list($username, $password, $url) = explode(“,”, fgets($fh,1024));

if(($username == $_POST[‘username’]) && ($password = $_POST[‘password’])){
$_SESSION[‘username’] = $username;
$_SESSION[‘present’] = true;
$_SESSION[‘legal’] = true;
$_SESSION[‘profile’] = $username.”.txt”;
array_push($_SESSION[‘users’], $username); //add the current user to the list of users
header(“Location: “.$url);
$userFound = true; //confirm that the user was found

}
}

fclose($fh);
//we need to use break to exit the foreach loop if the user is found in one of the files
if($userFound)
break;
} else
echo “Unable to complete”;
}
if(!$userFound)
login(‘Invalid Member name or Password.<br />’);
} else {
login();
}
?>
<?php

function login($response=’Welcome visitor !’) {
?>
[/code]

the user, password and redirection path are listed like the following in the files :

user, pass, path
user, pass, path

How can I add this sign in feature, user would click on sign in, fill a form with his/her full name as user, no space, choose a password, an email would be send and there would be an link to confirm, then the user would be added to the really list.

Thanks!

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