$product_name = mysql_real_escape_string($_POST['product_name']);
    $product_name = sanitize($product_name);

$query = mysql_query("SELECT * FROM products WHERE product_name = '$product_name' LIMIT 1");
    $match = mysql_num_rows($query); // count the output amount
    if (($match > 0)===true) {
         $errors[]='Sorry you tried to place a duplicate "Product Name" into the system!';
         break 1;
    }

if ($match > 0) {

if (($match > 0)===true) {