如何在php中的数组中添加特定数字[关闭]

Question

$a = array(2, 6, 24, 16, 7, 10);

I know how to add all the numbers using array_sum() but if I want to add only the numbers between 2 and 16 how can do that?

This is one of the solution that that I've come up with:

    $a = array(2, 6, 24, 16, 7, 10);
    $r = array_slice($a, 0, -2);
    print_r (array_sum($r));

Just want to know if there is any other way to get the result.

Answer 1

To deal with dynamic bound limits you can extend the initial approach(array_slice + array_sum) using array_search function:

$arr = [2, 6, 24, 16, 7, 10];
$a = 10;
$b = 24;

$lowerBound = array_search($a, $arr);
$upperBound = array_search($b, $arr);

if (($low = $lowerBound) > $upperBound) {  // if bounds were confused
    $lowerBound = $upperBound;
    $upperBound = $low;
}
$sum = array_sum(array_slice($arr, $lowerBound, $upperBound - $lowerBound + 1));

print_r($sum);  // 57