Selecting an array of rows using MySQLi

Question

I'm trying to return results from an array of varying row numbers. Right now each row number in mysqli query is manually entered. How would you replace these values with the values of the currentUsers array?

$currentUsers = array('1', '3', '7', '10');

while ($row = mysqli_fetch_array ($query))
{   
    $interestValue = ((int) "$row[1]") + 
                     ((int) "$row[3]") + 
                     ((int) "$row[7]") + 
                     ((int) "$row[10]");
    echo "$interestValue";
}

Answer 1

Inside the while loop use the array like this:

$interestValue = 0;
foreach ( $currentUsers as $i ) {
    $interestValue = $interestValue + (int) $row[$i];
}
echo $interestValue;