php连接到数据库的语句

<?php
header("content-Type: text/html; charset=utf-8");
$link =@mysql_connect("127.0.0.1","root","");
if(!$link)
{
die('Could not connect: ' . mysql_error());
}
mysql_query("set names utf8",$link);
mysql_select_db("database_name",$link);
?>