you can also try this Code:
<?php
$db_resource = mysqli_connect('Host Name', 'username', 'password');
$dbconn = mysqli_select_db('Data base Name', $db_resource);
$query = 'SELECT * FROM list order by category , subcategory';
$result = mysqli_query($query);
while($row = mysqli_fetch_array($result))
{
print_r($row);
}
?>