calculateHash example

/** * @var array<string, combination> */
    protected array $combinationDetails = [];

    /** * @param string[] $optionIds */
    public function hasCombination(array $optionIds): bool
    {
        return isset($this->hashes[$this->calculateHash($optionIds)]);
    }

    /** * @param string[] $optionIds */
    public function addCombination(array $optionIds, bool $available): void
    {
        $hash = $this->calculateHash($optionIds);
        $this->hashes[$hash] = true;
        $this->combinations[$hash] = $optionIds;
        $this->combinationDetails[$hash] = [