TalkPHP - Login script, session password issue..

Good day to you all,
I'm working on a flat file database login script.

I have notice that once the user have input his/her username in the field what ever he/she put as password, as long as they put something in the field, matching or not, they are in.

I'm sure I'm doing something wrong.

Don't worries, I hide my flat file behind a httpassword file.

Here is my code:

PHP Code:


		
			

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

//the list of files containing passwords
$files = array(
    "../../MurSec/FSC/memmob.txt", 
    "../../MurSec/FSC/memmob.txt", 
    "../../MurSec/FSC/memmob.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

// other session and log action
    
    
}
                }    
            }
            
            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 open a required password file: $file";
    }
    if(!$userFound)
        login('Wrong username or password.<br />');
} else {
    login();
}
?>
<?php

function login($response='Bienvenue, invit&eacute;(e) !') {
?>

<html>
</head>





</head>
<body>




<fieldset  style="background-color:#cccccc;">
  <legend><?=$response?></legend>
<form action="" method="post">
        <label for="nom">Membre :</label><input name="username" type="text" /><br>
        <label for="nom">Passe :</label><input name="password" type="password"><br>
        <br><center><input type="submit" value="Valider" /><br/></center>
</form>
</fieldset>

</body>
</html>




<?php } ?>

Thanks !