php和mysql怎么连接啊

<?php
$con = mysql_connect("localhost","peter","abc123"); //服务器名，账号，密码
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
// some code
?>本回答被提问者采纳

mysql_connect("localhost","root","pwd");
mysql_select_db("库名");
mysql_query("set names utf8");

是不懂配置，还是不懂怎么调用啊。