Question

I don’t have a problem, but i’m looking for any other maybe better or faster solution.
I have array with two keys ALL and ART:

$myData = Array (
 [ALL] => Array (
   [0] => Array (
    [ID_COUNTRY] => 23
    [DELIVERY_DAYS] => 23
    [AMOUNT] => 23
   )
  [1] => Array (
   [ID_COUNTRY] => 30
   [DELIVERY_DAYS] => 30
   [AMOUNT] => 30
  )
 )
 [ART] => Array (
  [0] => Array (
   [ID_COUNTRY] => 10
   [DELIVERY_DAYS] => 10
   [AMOUNT] => 10
  )
  [1] => Array (
   [ID_COUNTRY] => 2
   [DELIVERY_DAYS] => 20
   [AMOUNT] => 20
  )
 )
)

And have 2 foreach loops to check the values

<?php 
foreach ($myData as $key1=>$key2) {
  foreach ($key2 as $key=>$data) { 
    ...
  }
}
?>

Is possible to do something like this or is the only solution to use two foreach loops without any additional libraries.

<?php
foreach($myData as $key1=>$key2=>$value) {
 echo $key1; // [ALL] or [ART]
 echo $key2; // [ALL][$key2] or [ART][$key2];
}
?>

Answer 1

If you want to loop over your multi-dimensional array you need your provided code:

foreach ($myData as $key1=>$key2) {
  foreach ($key2 as $key=>$data) { 
    ...
  }
}

No way around it without using something that would in the end do this too. There is no speed to be gained here. And if there is it would be a micro-optimization that you should ignore 🙂