更新功能工作正常，但没有更新数据库。我尽了最大的努力来修复它。有什么问题吗？

// edit vaccine information
function updateVaccine($vac)
{
    // $vacc_id=$_POST['vacc_id'];
    // $vacc_name=$_POST['vacc_name'];
    // $vacctrade_name=$_POST['vacctrade_name'];
    // $vacc_type=$_POST['vacc_type'];
    // $vacc_target=$_POST['vacc_target'];
    // $vacc_dosage=$_POST['vacc_dosage'];

    $sqlUpd = "UPDATE vaccine 
            SET  vacc_name ='".$vac->getVacc_name()."',
            vaccTrade_name ='".$vac->getVacctrade_name()."',  
            vacc_type ='".$vac->getVacc_type()."',
            vacc_target ='".$vac->getVacc_target()."',
            vacc_dosage ='".$vac->getVacc_dosage()."' 
            WHERE vacc_id ='".$vac->getVacc_id()."' "; 
    
    $this->con->query($sql);
    
    echo "<script>alert('Vaccine Information Was Successfully Updated')</script>";
    echo "<meta http-equiv='refresh'content='0;url=vaccineInfo.php'>";
    $this->con->close();
}

顺晟科技：