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<?php
namespace DaanMooij\AdventOfCode\Year2015;
use DaanMooij\AdventOfCode\Day;
class Day1 implements Day
{
const FLOOR_UP = '(';
const FLOOR_DOWN = ')';
private array $directions = [];
public function loadInput(): void
$filepath = __DIR__ . "/input/day-1.txt";
$this->directions = str_split(file_get_contents($filepath));
}
public function solve()
printf("The resulting floor is: %s\n", $this->calculateFloor());
public function calculateFloor(int $floor = 0): int
foreach ($this->directions as $direction) {
if ($direction === self::FLOOR_UP) {
$floor++;
} elseif ($direction === self::FLOOR_DOWN) {
$floor--;
return $floor;
public function setDirections(array $directions): void
$this->directions = $directions;
public function getDirections(): array
return $this->directions;
daanmooij /
advent-of-code-php
