code noob

<?php
$host = "localhost";
$user = "root";
$pass = "xxxx";
$db = "code_noob";
mysql_connect($host,$user,$pass) or die(mysql_error());
mysql_select_db($db) or die(mysql_error());

$query = mysql_query("SELECT username FROM admin WHERE admin_id=1") or die(mysql_error());

//percabangan ini sy sisipkan supaya tidak terjadi error pada fungsi print hasil nantinya.
if($query == false){
die(mysql_error());
}
while($hasil = mysql_fetch_array($query)){
echo $hasil['username'];
}
?>