My entry to the Blonde Code Golf Challenge April 2016

blonde_code_golf_2016_04.php

<?php
function checkout($number) {
$s=$f=[50=>bull];foreach(range(1,20)as$d){$s[$d*3]=t.$d;$f[$p=$d*2]=$s[$p]=d.$d;$s[$d]=$d;}$o=$f;foreach($f as$v=>$l)foreach($s as$b=>$a){$f[$h=$v+$b]||$o[$h]="$a, $l";foreach($s as$d=>$c)$o[$q=$v+$b+$d]=$o[$q]??"$c, $a, $l";}return$o[$number];
}

// and expaned a bit for readability
$s =$f = [50 => bull];

foreach (range(1,20) as $d) {
  $s[$d*3] = t.$d;
  $f[$p=$d*2] = $s[$p] = d.$d;
  $s[$d] = $d;
}

$o=$f; // outs start off as the one dart finishers

foreach ($f as $v => $l) 
    foreach ($s as $b => $a) { // create 2 dart finishes
      $f[$h=$v+$b] || $o[$h]="$a, $l"; // don't make if there is a 1 dart finish
      foreach($s as $d => $c) $o[$q=$v+$b+$d] = $o[$q] ?? "$c, $a, $l"; // create 3 dart finishes, if there is not a better finish 
    }


return$o[$number];