จะทำให้ array เชื่อมต่อฐานข้อมูลอย่างไรครับมีโค้ดตัวอย่างครับ

<?php
$user = $_GET["user"];
$pass = $_GET["pass"];
$fp = fopen("new_update.txt", "r"); //Change this to whatever you want
$string = fgets($fp); 
$array = array(
    'ADMIN'	=> 'PASS',
    'USER'	=> 'PASS');

while ($name = key($array)) {
    if ($name == $user) {
	if ($pass == current($array))
	{
		echo $string;
		break;
	}
	else
	{
		echo "01";//Wrong Password
		break;
	}      
    }
    next($array);
}
echo "02";//Wrong Username
?>

<?php
$hostname = "localhost";
$user = "xxxx";
$password = "xxxx";
$dbname = "xxxx";
$tblname = "xxxx"; 
?>

<?php
mysql_connect($hostname, $user, $password) or die("ติดต่อฐานข้อมูลไม่ได้");
mysql_select_db($dbname) or die("เลือกฐานข้อมูลไม่ได้");

$user = $_GET["user"];
$pass = $_GET["pass"];
$fp = fopen("new_update.txt", "r"); //Change this to whatever you want
$string = fgets($fp); 

$sql = "select * from $tblname where user='$user' and pass='$pass'";
$dbquery = mysql_db_query($dbname, $sql);
$num_rows = mysql_num_rows($dbquery);
if($num_rows==1){