Trying to get sum of array values

Question

I got this array and I am trying to make a sum of the [za] values but without any success.

My last try was this code:

foreach ( $sumza as $sumzakey ) {
              $sum += $sumza[$sumzakey]['za'];
}





Array
(
    [0] => Array
        (
            [za] => 3600
        )

    [1] => Array
        (
            [za] => 7200
        )

    [2] => Array
        (
            [za] => -27360
        )

    [3] => Array
        (
            [za] => 3600
        )

    [4] => Array
        (
            [za] => 
        )

    [5] => Array
        (
            [za] => 3600
        )

    [6] => Array
        (
            [za] => 3600
        )

    [7] => Array
        (
            [za] => 3600
        )

    [8] => Array
        (
            [za] => 7200
        )

    [9] => Array
        (
            [za] => 7740
        )

    [10] => Array
        (
            [za] => 
        )

    [11] => Array
        (
            [za] => -27360
        )

    [12] => Array
        (
            [za] => 7200
        )

    [13] => Array
        (
            [za] => 3600
        )

    [14] => Array
        (
            [za] => 8640
        )

    [15] => Array
        (
            [za] => 3600
        )

    [16] => Array
        (
            [za] => 6840
        )

    [17] => Array
        (
            [za] => 
        )

    [18] => Array
        (
            [za] => 5040
        )

    [19] => Array
        (
            [za] => 5040
        )

    [20] => Array
        (
            [za] => 5040
        )

    [21] => Array
        (
            [za] => -27360
        )

    [22] => Array
        (
            [za] => 
        )

)

John Conde · Accepted Answer · 2013-10-25 18:37:00Z

2

Try:

$sum = 0;
foreach ( $sumza as $sumzakey ) {
    $sum += $sumzakey['za'];
}

$sumzakey actually represents each array within $sumza. If you wanted to use your approach you would do:

$sum = 0;
foreach ( $sumza as $sumzakey => $sumzavalue ) {
    $sum += $sumza[$sumzakey]['za'];
}

In that case you now have the array key for each array element in $sumza and can use it to access each array element in $sumza. But that would be unecessary and not as clear as the code above.

answered Oct 25, 2013 at 18:37

John Conde

220k100 gold badges464 silver badges504 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Trying to get sum of array values

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related