Trouble with PHP server script

["Robert Cox" <Robert.Cox@xxxxxxxxxxx>]

Is it possible to use the "$_SERVER['PHP_AUTH_USER'];" construct in a URL
forwarded site?  I am trying to find the authorised user id so that I can
access an SQL database with it.  Anyone got some ideas?
 
PHP looks like this....
 
 <?php
 //Get User
  $user = $_SERVER['PHP_AUTH_USER'];
  
 // Get User type
  $db = mysql_connect(localhost, ....., .....) or die("Can't connect to
database: ".mysql_error());
        mysql_select_db(................) or die("Can't select database:
".mysql_error());
  
  $query = "SELECT * FROM user WHERE staffid LIKE $user";
  $result = mysql_query($query) or die ('Not a valid User: ' .
mysql_error());
....
?>