CI框架中使用ajax操作数据库有关问题

 ";


$con = mysql_connect('localhost', 'root', '');
if (!$con)
 {
 die('Could not connect: ' . mysql_error());
 }

mysql_select_db("test", $con);
mysql_query("set names utf8");

//$sql = " SELECT * FROM ecm_acategory ";
$sql = " insert into data (name) values('999')";
echo $sql;
$result = mysql_query($sql);


mysql_close($con);
?>