<?php
  $inputs = explode(", ","R4, R1, L2, R1, L1, L1, R1, L5, R1, R5, L2, R3, L3, L4, R4, R4, R3, L5, L1, R5, R3, L4, R1, R5, L1, R3, L2, R3, R1, L4, L1, R1, L1, L5, R1, L2, R2, L3, L5, R1, R5, L1, R188, L3, R2, R52, R5, L3, R79, L1, R5, R186, R2, R1, L3, L5, L2, R2, R4, R5, R5, L5, L4, R5, R3, L4, R4, L4, L4, R5, L4, L3, L1, L4, R1, R2, L5, R3, L4, R3, L3, L5, R1, R1, L3, R2, R1, R2, R2, L4, R5, R1, R3, R2, L2, L2, L1, R2, L1, L3, R5, R1, R4, R5, R2, R2, R4, R4, R1, L3, R4, L2, R2, R1, R3, L5, R5, R2, R5, L1, R2, R4, L1, R5, L3, L3, R1, L4, R2, L2, R1, L1, R4, R3, L2, L3, R3, L2, R1, L4, R5, L1, R5, L2, L1, L5, L2, L5, L2, L4, L2, R3");
  $directions = ['N', 'E', 'S', 'W'];

  $path = [];
  $cursor = [
    "x" => 0,
    "y" => 0
  ];

  $direction = 0;

  foreach ($inputs as $value) {
      $rotation = substr($value, 0 , 1);
      $distance = (int)substr($value, 1);

      switch ($rotation) {
        case 'R':
          $direction++;
          break;
        case 'L':
          $direction--;
          break;
      }

      switch($directions[$direction % 4]) {
        case 'N':
          for ($i=0; $i < $distance; $i++) {
            $cursor["y"]++;
          if (hasBeenHereBefore($cursor, $path)) return false;
            array_push($path, $cursor);
          }
        break;
        case 'E':
          for ($i=0; $i < $distance; $i++) {
            $cursor["x"] ++;
            if (hasBeenHereBefore($cursor, $path)) return false;

            array_push($path, $cursor);
          }
        break;
        case 'S':
          for ($i=0; $i < $distance; $i++) {
            $cursor["y"] --;
            if (hasBeenHereBefore($cursor, $path)) return false;
            array_push($path, $cursor);
          }
        break;
        case 'W':
          for ($i=0; $i < $distance; $i++) {
            $cursor["x"] --;
            if (hasBeenHereBefore($cursor, $path)) return false;
            array_push($path, $cursor);
          }
        break;
      }
    }


    function hasBeenHereBefore($cursor, $path) {
      foreach ($path as $value) {
        if($cursor['x'] === $value['x']){
          if($cursor['y'] === $value['y']){
            var_dump($value['x']);
            var_dump($value['y']);
            return true;
          }
        }
      }
      return false;
    }

?>