Convert multidimensional objects to array

Question 1

I'm using amazon product advertising api. Values are returned as a multidimensional objects.

It looks like this:

object(AmazonProduct_Result)#222 (5) {
  ["_code":protected]=>
  int(200)
  ["_data":protected]=>
  string(16538) 
array(2) {
    ["IsValid"]=>
    string(4) "True"
    ["Items"]=>
    array(1) {
      [0]=>
      object(AmazonProduct_Item)#19 (1) {
        ["_values":protected]=>
        array(11) {
          ["ASIN"]=>
          string(10) "B005HNF01O"
          ["ParentASIN"]=>
          string(10) "B008RKEIZ8"
          ["DetailPageURL"]=>
          string(120) "http://www.amazon.com/Case-Logic-TBC-302-FFP-Compact/dp/B005HNF01O?SubscriptionId=AKIAJNFRQCIJLTY6LDTA&tag=*********-20"
          ["ItemLinks"]=>
          array(7) {
            [0]=>
            object(AmazonProduct_ItemLink)#18 (1) {
              ["_values":protected]=>
              array(2) {
                ["Description"]=>
                string(17) "Technical Details"
                ["URL"]=>
                string(217) "http://www.amazon.com/Case-Logic-TBC-302-FFP-Compact/dp/tech-data/B005HNF01O%3FSubscriptionId%3DAKIAJNFRQCIJLTY6LDTA%26tag%*******-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D386001%26creativeASIN%3DB005HNF01O"
              }
            }
            [1]=>
            object(AmazonProduct_ItemLink)#17 (1) {
              ["_values":protected]=>
              array(2) {

I mean it also has array inside objects. I would like to convert all of them into a multidimensional array.

Question 2

You can use recursive function like below:

function object_to_array($obj, &$arr)
{
 if (!is_object($obj) && !is_array($obj))
 {
  $arr = $obj;
  return $arr;
 }

 foreach ($obj as $key => $value)
 {
  if (!empty($value))
  {
   $arr[$key] = array();
   objToArray($value, $arr[$key]);
  }
  else {$arr[$key] = $value;}
 }

 return $arr;
}

Question 3

You need to iterate over your results, adding a new entry to the output when you encounter a new team, or updating the points value when you find the same team again. This is most easily done by initially indexing the output by the team name, and then using array_values to re-index the array numerically:

$teams = array();
foreach ($results as $result) {
    $team = $result['team'];
    if (!isset($teams[$team])) {
        $teams[$team] = array('team' => $team, 'points' => $result['punti']);
    }
    else {
        $teams[$team]['points'] += $result['punti'];
    }
}
$teams = array_values($teams);
print_r($teams);

Output (for your sample data):

Array
(
    [0] => Array
        (
            [team] => Red Bull Racing
            [points] => 418
        )
    [1] => Array
        (
            [team] => Scuderia Ferrari
            [points] => 353
        )
    [2] => Array
        (
            [team] => Mercedes-AMG
            [points] => 516
        )
    [3] => Array
        (
            [team] => Racing Point F1
            [points] => 147
        )
    [4] => Array
        (
            [team] => Haas F1
            [points] => 127
        )
)

Demo on 3v4l.org

Question 4

Actually your

$children = $this->getDoctrine()->getRepository('PmbLicensingBundle:Category')
                                ->findByParent($category);`

already returns an array so you don't have to (and can't) use ->toArray().

When you loop through your categories with

foreach ($children as $child)
    $child["..."] = ...

You are treating an obect $child like an array with ["..."]. That's what your error message is about.

If you can, you should probably use doctrine and let it fill the related child and parent categories. See the Doctrine Documentation on this. Then you have automatically all your Children and can access them like $category->getChildren() (This one will return an ArrayCollection). This will save you a lot of work.

Question 5

As order of values in array returned by Object.values() isn't guaranteed, you should consider use of .map() with some Object Destructuring. You can then extract object properties in separate variables and return them in desired order explicitly.

const data = [
  { amount: '100', user: 'admin', date: 'March 6, 2019' },
  { amount: '120', user: 'admin', date: 'March 6, 2019' },
  { amount: '80',  user: 'admin', date: 'March 7, 2019' },
  { amount: '200', user: 'admin', date: 'March 7, 2019' }
];

const result = data.map(({ amount, user, date }) => [amount, user, date]);

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }

Question 6

You can do it like this, do the calculation from the innermost of the array. Check the demo.

<?php
function f(&$array)
{
    foreach($array as $k => &$v)
    {
        if(is_array($v))
        {
            if(count($v) == count($v, 1))
            {
                unset($array[$k]);
                if($k == 'sum')
                {
                    $v =  array_sum($v);
                    $array[] = $v;

                }elseif($k == 'multiply'){
                    $v = array_product($v);
                    $array[] = $v;
                }else{

                    foreach($v as $vv)
                        $array[] = $vv;
                }
            }else
                f($v);
        }
    }
}

while(count($array) != count($array, 1))
{
    f($array);
}

print_r($array);

Note：

traverse array from outer to inner
traverse array from inner to outer

Convert multidimensional objects to array

Answers

php,arrays,multidimensional-array