PHP create 3D Array from Array with 3 Values

Question

Hi,

again me:

following array;

$myArray = array('FOO', 'BAR', 'HELLO');

i need:

$myArray['FOO']['BAR']['HELLO'] = 0;

any ideas?

Answer 1

You might try $newArray[$myArray[0]][$myArray[1]][$myArray[2]] = 0;

Answer 2

$newArray = array($oldArray[0] => array($oldArray[1] => array($oldArray[2] => 0)));

Answer 3

you could do it with recursion:

function arrToKeys(&$arr,$initialCount){
   if($initialCount == 0 ){
      return $arr;
   }
   else{
      $newKey = $arr[0];
      unset($arr[0]);
      $arr[$newKey] = $arr;
      $initialCount--;
      return arrToKeys($arr,$initialCount);  
   }
}

//then call it like this
$newArr = arrToKeys($myArray,count($myArray));

Answer 4

 function onion($a) {
  return $a ? array(array_shift($a) => onion($a)) : 0;
}

$myArray = array('FOO', 'BAR', 'HELLO');
print_r(onion($myArray));

//edit: actually doc's solution is better, his/her code, a bit improved

  $new = 0;
  foreach (array_reverse($myArray) as $v)
       $new = array($v => $new);

Answer 5

$newarr[array_pop($myarr)] = 0;
foreach (array_reverse($myarr) as $v)
    $newarr[$v] = $newarr;