Convert multidimensional array into single array

Question

I have an array which is multidimensional for no reason

/* This is how my array is currently */
Array
(
[0] => Array
    (
        [0] => Array
                


        

Answer 1

Recently I've been using AlienWebguy's array_flatten function but it gave me a problem that was very hard to find the cause of.
array_merge causes problems, and this isn't the first time that I've made problems with it either.
If you have the same array keys in one inner array that you do in another, then the later values will overwrite the previous ones in the merged array.

Here's a different version of array_flatten without using array_merge:

function array_flatten($array) { 
  if (!is_array($array)) { 
    return FALSE; 
  } 
  $result = array(); 
  foreach ($array as $key => $value) { 
    if (is_array($value)) { 
      $arrayList=array_flatten($value);
      foreach ($arrayList as $listItem) {
        $result[] = $listItem; 
      }
    } 
   else { 
    $result[$key] = $value; 
   } 
  } 
  return $result; 
}