如何在PHP中将数组缩进另一个数组

Question

I have an array structure like the following:

I would like to have the elements keys, bi, media and offer under biz_id. Like this:

biz_id
 bi
 media
 offer
biz_id
...

My code is the following:

    foreach ($premiumContent as $targets=>$target)
{

    $finalResult[]["biz_id"] = $target->biz_id;

    foreach ($target->media as $media)
     {
        switch ($media->type_id)
        {
            case '1':
                $finalResult[]["info"] = $media->text;
            break;
            case '6':
                $finalResult[]["bi"] = $media->url;
            break; 
            case '4':
                $mediaGroup[] = array('link' => $media->url, 'descript' => $media->text);
            break;
            case '3':
                $offerGroup[] = array('link' => $media->url, 'descript' => $media->text);
            break; 
            default:
                echo '';
        }
    }
    $finalResult[]["media"] = $mediaGroup;
    $finalResult[]["offer"] = $offerGroup;
}

return $finalResult;

What can I do to group the keys underneath biz_id?

Thanks for the recommendations.

Answer 1

Simple: make the biz_id the key of the array:

foreach ($premiumContent as $targets=>$target)
{

    foreach ($target->media as $media)
     {
        switch ($media->type_id)
        {
            case '1':
                $finalResult[$target->biz_id]["info"] = $media->text;
            break;
            case '6':
                $finalResult[$target->biz_id]["bi"] = $media->url;
            break; 
            case '4':
                $mediaGroup[] = array('link' => $media->url, 'descript' => $media->text);
            break;
            case '3':
                $offerGroup[] = array('link' => $media->url, 'descript' => $media->text);
            break; 
            default:
                echo '';
        }
    }
    $finalResult[$target->biz_id]["media"] = $mediaGroup;
    $finalResult[$target->biz_id]["offer"] = $offerGroup;
}

return $finalResult;