php-php对mysql数据库的操作

<?php
$conn=mysql_connect('localhost','root','');
if($conn){
    print_r("ok");
}
else{
    print_r("error");
}
mysql_select_db('node',$conn);

$sql="select * from nd_wp";
$result=mysql_query($sql);
var_dump($result);

while($row = mysql_fetch_array($result))
{
echo $row['name'];
}
mysql_close($conn);
?>