Little help please with my project

DeadlyMan

I'M MAKING SMALL PROJECT AND I HAVE SOME PROBLEM WITH MY PROJECT

THAT I WANT TO KNOW IF USER IN DATABASE AND IF THE USER IS IS

THE PHP PRINT SUCCESS MESSAGE AND GIVE ME INFO ABOUT THE USE

HERE MY CODING



<?php

include("./db.php");
 $link = mysql_connect($server, $user, $pass);
 if(!mysql_select_db($database)) die(mysql_error());

$result = mysql_query("SELECT * FROM `members`");
$r = mysql_fetch_array($result);

$username = $r['username'];
$password = $r['password'];
$email = $r['email'];

//$keya=md5($_GET["key"]);

if (isset($_GET["key"]))  {

   $key = $_GET["key"];


		 $q = "SELECT username FROM `members` WHERE (username = '$key')";
         if(!($result_set = mysql_query($q))) die(mysql_error());
         $number = mysql_num_rows($result_set);

         if ($number) {

			print "USER FOUND  !"; 
			print "</br>";
			print "Mr  $username";
			print "</br>";
			print $password;
			print "</br>";
			print $email;

         }
         else {
			print "Sorry ! User Not Found "; 
}
}
?>

AND THE SQL IS IN ATTACH