3v4l.org

run code in 300+ PHP versions simultaneously
<?php function encode($arr, $value) { $arr = array_values($arr); $out = []; $c = count($arr); while($value > 0) { array_unshift($out, $arr[$value%$c]); $value = ($value - $value%$c) / $c; } return $out; } var_dump(encode(range('0', '1'), 15));

preferences:
48.78 ms | 402 KiB | 5 Q