[Solved] PHP multidimensional array keys combinations/combinatorics [closed]

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I made some slight modifications to the original code in order to make it use the amount of keys instead of the array values, and then I added a second function to allow a multi-dimensional array to be counted as well.

<?php
function everyCombination($array) {
  $newArray = array();
  for($keyCount = 1; $keyCount <= count($array); $keyCount++){
    $newArray[] = $keyCount;
  }
  $arrayCount      = count($newArray);
  $maxCombinations = pow($arrayCount, $arrayCount);
  $returnArray     = array();
  $conversionArray = array();
  foreach ($newArray as $key => $value) {
    $conversionArray[base_convert($key, 10, $arrayCount)] = $value;
  }
  for ($i = 0; $i < $maxCombinations; $i++) {
    $combination = base_convert($i, 10, $arrayCount);
    $combination = str_pad($combination, $arrayCount, "0", STR_PAD_LEFT);
    $returnArray[] = strtr($combination, $conversionArray);
  }
  return $returnArray;
}

function getCombos($array){
    if(is_array($array[key($array)])){
        $return = array();
        foreach($array as $subArray){
            $return[] = everyCombination($subArray);
        }
    }else{
        $return = everyCombination($array);
    }
    return $return;
}


$test = array(53,22,1233,45);

echo '<pre>';
print_r(getCombos($test));
echo '</pre>';

All credit for function and usage goes to https://stackoverflow.com/a/14022357/2285345

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solved PHP multidimensional array keys combinations/combinatorics [closed]