Question

I have a pretty complicated array operation, or at least it is complicated for me. Lets say I got such kind of array

$myArr['url_1']['linktypes']['follow'] = 10;
$myArr['url_1']['linktypes']['nofollow'] = 20;
$myArr['url_1']['linktypes']['other'] = 30;

$myArr['url_2']['linktypes']['follow'] = 40;
$myArr['url_2']['linktypes']['nofollow'] = 50;
$myArr['url_2']['linktypes']['other'] = 60;

$myArr['url_3']['linktypes']['follow'] = 70;
$myArr['url_3']['linktypes']['nofollow'] = 80;
$myArr['url_3']['linktypes']['other'] = 90;

and simply (!) I need to get following result

array(
    array("id"=>1,"metric"=>'follow','url_1'=>10,'url_2'=>40,'url_3'=>70),
    array("id"=>2,"metric"=>'nofollow','url_1'=>20,'url_2'=>50,'url_3'=>80),
    array("id"=>3,"metric"=>'other','url_1'=>30,'url_2'=>60,'url_3'=>90)
);

These array elements are created dynamicall from $myArr. I have tried many ways but I failed many times. Hopefully someone has a short, simple logic to solve this.

Thanks.
Edit: This one is my shortest try. I have many different ways but this code is a part of big code structure, example you see here is created to simplify the logic I need.

$linkStructure = array();
foreach($myArr as $links=>$value){
    $counter = 0;

    foreach($value['linktypes'] as $ltKey => $ltValue){
        if($linkStructure[$counter]["id"] && $linkStructure[$counter]["metric"] == $ltKey){
            $linkStructure[$counter][$links] = $ltValue;
        }
        else{
            $linkStructure[$counter]["id"] = $counter;
            $linkStructure[$counter]["metric"] = $ltKey;
            $linkStructure[$counter][$links] = $ltValue;
        }
    }

} 

I swear I tried how I can prove better I don’t know. Don’t torture please. If you have any idea just share, is it too much I’m asking for?

Answer 1

I can’t explain this very well, so I’m just going to use code:

$fixedArr = array();
$idCount = 1;

foreach($myArr as $title=>$subArr)
  foreach($subArr['linktypes'] as $metric=>$val) {
    if(!array_key_exists($metric)) {
      $fixedArr[$metric] = array();
      $fixedArr[$metric]['id'] = $idCount;
      $fixedArr[$metric]['metric'] = $metric;
      $idCount += 1;
    }
    $fixedArr[$metric][$title] = $val;
  }

That should do it.

But I should say that the comments are right, a better way to structure your array would be like this:

Array {
  [url_*] => Array {
    [metric] => someValue;
  }
}

Basically the same way you have it originally, but with fewer dimensions. This is all that you need for the data you have provided.