[PHP-DB] using Flat File

[web man]

Hi,

I have posted my question to this list before but I did not get a help that I was 
expected.

All I wanted to do is to give access for the users to view a page in which the below 
code is embedded. The user will enter his/her username and password.

But the code is not working.

I don't know what to think. 

I need your help guys. Don't let me die on this code 

<?php
>
> $auth = false;
> if (isset( $PHP_AUTH_USER )  && isset($PHP_AUTH_PW)) {
>
>
>     $filename = 'c:\\php_data\\file.txt';
>     $f = @fopen($filename, "r");
>      if ($f != FALSE)
>      {    $a = @fread($f, filesize($filename));
>             fclose($f);
>      }
>      else
>      {
>           echo "Could not open file";
>      }
>
>
>
>     $lines = explode ( "\n", $file_contents );
>
>
>
>     foreach ( $lines as $line ) {
>
>         list( $username, $password ) = explode( ':', $line );
>
>         if ( ( $username == "$PHP_AUTH_USER" ) &amp;&amp;
>              ( $password == "$PHP_AUTH_PW" ) ) {
>
>
>
>
>             $auth = true;
>             break;
>
>         }
>     }
>
> }
>
> if ( ! $auth ) {
>
>     header( 'WWW-Authenticate: Basic realm="Private"' );
>     header( 'HTTP/1.0 401 Unauthorized' );
>     echo 'Authorization Required.';
>     exit;
>
> } else {
>
>     echo '<P>You are authorized!</P>';
> }
>
> ?>
>
>




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