Hi, I have a hyperlink which goes to the page below and passes the PK_ID from a query into 'userid'. From this we query the DB and then echo a table with a form; only the textboxes are already populated with the data from the query (in theory)!!!

But I get a blank page! I have error reporting on php and mysql but nothing is displayed?

Code:
<?php

echo "<form method=\"post\" action=\"\" style=\"padding-left: 10px\">";

ini_set('display_errors','On');
error_reporting(E_ALL);

$user = $_GET['userid'];

include 'config.php';
include 'opendb.php';

$query = "select * from users WHERE user_id LIKE '$user'"; 

$result = mysql_db_query("servicemgmt", $query . mysql_error());

$r = mysql_fetch_array($result);

$firstname = $r['user_fname'];
$lastname = $r['user_lname'];
$ext = $r['user_ext'];
$bleep = $r['user_bleep'];
$exttel = $r['user_extno'];
$email = $r['user_email'];


echo "<table style=\"width: 80%\">";
echo "<tr><td>First Name</td><td><input type=\"text\" value=\"$firstname\" name=\"firstname\" id=\"firstname\" style=\"width: 160px\"/></td><td>Last Name</td><td> <input type=\"text\" value=\"$lastname\" name=\"lastname\" id=\"lastname\" style=\"width: 160px\"/></td></tr>";
echo "<tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>";
echo "<tr><td>Extension</td><td> <input type=\"text\" value=\"$ext\" name=\"ext\" id=\"ext\" style=\"width: 160px\"/></td><td>Bleep No.</td><td> <input type=\"text\" value=\"$bleep\" name=\"bleep\" id=\"bleep\" style=\"width: 160px\"/></td></tr>";
echo "<tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>";
echo "<tr><td>External Tel.</td><td><input type=\"text\" value=\"$exttel\" name=\"exttel\" id=\"exttel\" style=\"width: 160px\"/></td><td>&nbsp;</td><td>&nbsp;</td></tr>";
echo "<tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>";
echo "<tr><td>Email</td><td><input type=\"text\" value=\"$email\" name=\"email\" id=\"email\" style=\"width: 200px\" /></td><td>&nbsp;</td><td>&nbsp;</td></tr>";
echo "<tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td></tr>";
echo "<tr><td><input name=\"updateuser\" type=\"submit\" id=\"updateuser\" value=\"Update User Details\" /></td><td>&nbsp;</td><td>&nbsp;</td><td><input name=\"reset1\" type=\"reset\" value=\"Clear Form\" /></td></tr>";
echo "</table>";

echo "</form>";

?>