Display count of unique values in MySQL db table using PHP

So I have a table named pins that has 3 columns that need to be taken into consideration. These columns are plan and order_id.

I need to get a count for all of the pins that have an order_id=0 and plan=9.

This is what I have so far:

$qT="SELECT plan, COUNT(*) as cnt FROM pins WHERE order_id=0 and plan=9";
$res=mysql_query($qT);<br/>
mysql_free_result($res);

while($row = mysql_fetch_array($res)) {<br/>
echo $row['plan'];<br/>
}

Any help in displaying the results would be a great help.