how to create a table through code in php

<?php
@mysql_connect('localhost','root','');
@mysql_select_db('db');
$query='CREATE TABLE IF NOT EXISTS demo
(
id INT NOT NULL AUTO_INCREMENT,
name VARCHAR(40) NOT NULL DEFAULT ""
)
';
if(@mysql_query($query))
{
    echo 'table created';
}
else
{
    echo 'table not created';
  }
 
?>