About php operating mysql

header("Content-type: text/html; charset=utf-8");
$db_config = array(
		"host"=>"localhost",
		"db_user"=>"root",
		"db_password"=>"hxsbhxsb",
		"db_name"=>"chenchen"
	);
$link = @mysql_connect($db_config["host"],$db_config["db_user"],$db_config["db_password"]);
if($link){
	// echo "数据库连接成功!";
}else{
	die("数据库连接失败，请与管理员联系！");
}
mysql_select_db($db_config["db_name"]);
mysql_query("set names utf8");
$res = mysql_query("select * from tab3");
if($res){
	$row = mysql_fetch_row($res);
	var_dump($row);
	$row = mysql_fetch_row($res);
	var_dump($row);
}else{
	echo "错误信息".mysql_error();
}