How to join from another tabel?

include 'Company.php';
$company = new Company();
$companyData = $company->getCompanyById($companyId);

var_dump($companyData);

class Company
{
   public function getCompanyById($companyId)
    {
$sql="SELECT companies.id, companies.company_type_id, companies.name, companies.email
            FROM companies
            INNER JOIN company_type
            ON company_type.name = companies.company_type_id WHERE companies.id = $companyId ";        
         $query = $this->db->pdo->prepare($sql);
        $query->bindValue(':company_id', $companyId);
        $query->execute();
        $result = $query->fetch(PDO::FETCH_OBJ);
        return $result;
    }
}

id     |     name   |    email   |   company_type_id