Question

I have a multidimensional array which is created by a MySQL query which collects results based on a number of groups and sums. The array is below.

I’m interested in the costtotal and hitcount for each type of ‘ad_type’, ‘click_status’ and ‘link_status’ variation.

The possible values of the 3 types of variable are known:
i.e.

• ad_type 0 / 1
• click_status 2 / 3
• link_status 1 / 2

I would like to create a new array based on the results of each combination.

I’m guessing a search or split would do it but I’m not having much luck.

How would I go about doing this?

Array
(
    [0.261346210037681] => Array
        (
            [costtotal] => 0.0015
            [hitcount] => 1
            [ad_type] => 0
            [click_status] => 2
            [link_status] => 1
        )

    [0.190427019438173] => Array
        (
            [costtotal] => 0.001
            [hitcount] => 1
            [ad_type] => 0
            [click_status] => 3
            [link_status] => 1
        )

    [0.563596305962276] => Array
        (
            [costtotal] => 0.007
            [hitcount] => 5
            [ad_type] => 1
            [click_status] => 2
            [link_status] => 1
        )

    [0.893211513658251] => Array
        (
            [costtotal] => 0
            [hitcount] => 3
            [ad_type] => 1
            [click_status] => 2
            [link_status] => 2
        )

    [0.209184847035617] => Array
        (
            [costtotal] => 0.004
            [hitcount] => 2
            [ad_type] => 1
            [click_status] => 3
            [link_status] => 1
        )

    [0.73545002260753] => Array
        (
            [costtotal] => 0
            [hitcount] => 1
            [ad_type] => 1
            [click_status] => 3
            [link_status] => 2
        )

)

Answer 1

If I fully understand what you want, then this code should satisfy you:

function generateClickCounterInfo() {
    return array(
        'costTotal' => 0.0,
        'hitCount' => 0
    );
}

function generateLinkStatusStructure() {
    return array(
        1 => generateClickCounterInfo(),
        2 => generateClickCounterInfo()
    );
}

function generateClickStatusStructure() {
    return array(
        2 => generateLinkStatusStructure(),
        3 => generateLinkStatusStructure()
    );
}

function generateAdTypeArrayStructure() {
    return array(
        0 => generateClickStatusStructure(),
        1 => generateClickStatusStructure()
    );
}

function getClickCounterReport(array $data) {
    $result = generateAdTypeArrayStructure();

    foreach ($data as $key => $value) {
        $adType      = $value['ad_type'];
        $clickStatus = $value['click_status'];
        $linkStatus  = $value['link_status'];


        if (!isset($result[$adType])
            || !isset($result[$adType][$clickStatus])
            || !isset($result[$adType][$clickStatus][$linkStatus])) {
            throw new Exception(
                "Input data does not conform to expected format. " .
                "ad_type = {$adType}, click_status = {$clickStatus}, link_status = ${linkStatus}"
            );
        }

        $costTotal = $value['costtotal'];
        $hitCount  = $value['hitcount'];

        $result[$adType][$clickStatus][$linkStatus]['costTotal'] += $costTotal;
        $result[$adType][$clickStatus][$linkStatus]['hitCount']  += $hitCount;
    }

    return $result;
}

And than getClickCounterReport($data) (where $data is data provided by you) will produce following array: http://pastebin.ubuntu.com/607464/

P.S. Knowing disadvantages:

• No OOP (but these functions will be easy to transform to methods)
• Magick numbers (0, 1, 2, 3 etc)