Code Wars Best Travel Problem with CLI testing

BestTravel.php

<?php
function getAllCombinations($in, $minLength = 1, $max = 2000) {
  $count   = count($in);
  $members = pow(2, $count);
  $ret     = array();
  for($i=0; $i<$members; $i++){
    $b    = sprintf("%0".$count."b", $i);  //Build out binary representation
    $out  = [];
    for($j=0; $j<$count; $j++){
      if($b{$j} === '1'){
        array_push($out, $in[$j]);
        //$out[] = $in[$j];
      }
    }//end j-for
    if(count($out) >= $minLength && count($out) <= $max){
      array_push($ret, $out);
      //$ret[] = $out;
    }
  }//end i-for
  return $ret;
}//end getAllCombinations()
function chooseBestSum($t, $k, $ls) {
  /*
  Input:
    $t is johns mile limit
    $k is johns town limit
    $ls is arr of just distances
  Output:
    return larget int of miles obtainable
    If no distance match, return null
  */
  $lsum  = null;
  $ns    = getAllCombinations($ls, $k, $k);
  for ($i=0; $i<count($ns); $i++){
    $combination = $ns[$i];
    $sum = array_sum($combination);
    if($sum > $lsum && $sum <= $t){
      $lsum = $sum;
      if($lsum === $t)
        return $lsum;
    }
  }//end i-for
  return $lsum;
}//end chooseBestSum()

/*****************************************************
Notice below and in the tests that we are able to use
  the $max and $minLength in getAllCombinations() to 
  distinguish between the tests' accepting larger or 
  smaller sets of destinations;
*****************************************************/
$passes  = 0;
$total   = 3;
$dist1   = array(74, 40, 20, 30, 22, 44, 50);
$out1    = chooseBestSum(75, 2, $dist1);
$out2    = chooseBestSum(73, 3, $dist1);
$out3    = chooseBestSum(51, 1, $dist1);
if (74 === $out1)
  $passes++;
if (72 === $out2)
  $passes++;
if (50 === $out3)
  $passes++;

echo $passes . " OUT OF " . $total . " CASES PASSED\n";
?>