yii\rbac\DbManager::getRules PHP Method

    public function getRules()
    {
        if ($this->rules !== null) {
            return $this->rules;
        }
        $query = (new Query())->from($this->ruleTable);
        $rules = [];
        foreach ($query->all($this->db) as $row) {
            $rules[$row['name']] = unserialize($row['data']);
        }
        return $rules;
    }