Beginning: Making DB connection in PHP

$host = "localhost"; //database location
$user = "ganesh"; //database username
$pass = "success"; //database password
$db_name = "phptest"; //database name
//database connection
$link = mysql_connect($host, $user, $pass);
mysql_select_db($db_name);
//sets encoding to utf8
mysql_query("SET NAMES utf8");

$sqlstr = mysql_query("SELECT * FROM Customers");
if (mysql_numrows($sqlstr) != 0) {
while ($row = mysql_fetch_array($sqlstr)) {
?>

}
}
?>