Question

I submit the price and category_id through a form and then the query shows me the results. What I have is this below.

$s = mysql_real_escape_string($_GET["s"]);
$c = mysql_real_escape_string($_GET["c"]);

SELECT COUNT(id) FROM products WHERE price <= '$s' AND category_id = '$c'

When a user does not select any category and the value of it is blank, there is nothing displayed. How can I fix the query that if $c does not have any value ignore the AND category_id = '$c' ?

I thought to create a second query for this purpose, but is there any other way ?

Answer 1

Something like this should work:

$s = mysql_real_escape_string($_GET["s"]);
$c = (int) $_GET["c"];

$qpart = ($c > 0 ? " AND category_id = $c " : '');
$qry = "SELECT COUNT(id) FROM products WHERE price <= '$s' ". $qpart;