创建一个在线购物车

Question

I am trying to sum the price of all products selected. If I chose 2 Products for example, whose prices are 13 and 15 then the output will be : "13 15"

My question is, How can I output the result of the two items? ( for this example , 28 )

for ($pos=0; $pos<=$level2; $pos++) { 
    $level3 = $level1[$pos];
    echo " ";
    $result2 = mysql_query("SELECT * FROM products WHERE id='$level3'");
    $results2 = array();
    while($row2 = mysql_fetch_array($result2))
    {
        $results2[] = $row2['price'];
        $level4 = array_sum($results2);
        echo "Price is".$level4;
    }

Answer 1

I would do it like this:

$sum = 0;
for ($pos=0; $pos<=$level2; $pos++) { 
    $level3 = $level1[$pos];
    $result2 = mysql_query("SELECT * FROM products WHERE id='$level3'");
    while($row2 = mysql_fetch_array($result2))
    {
        $sum += $row2['price'];
    }
}
echo 'Price is '.$sum;