javascript - 如何在3个月内显示来自数据库的div内容

我有数据库date1会来，那date1我已经添加了3个月，那是date2我写了if条件但不起作用的代码

我已经在工作并且编写了一些代码，但是没有工作

$createDate = new DateTime($ac_join);
$strip = $createDate->format('d-m-Y');
$effectiveDate = date('d-m-Y', strtotime("+3 months", strtotime($last)));

输出会像这样

$最后值：25-04-2019
添加3个月后：27-07-2019

 if($effectiveDate > $last )
{
   // last value to 3 months content not display
}

我预计结果是如果条件仅在显示内容后满足3个月，否则将保留值显示

这是代码

<?php $sql ="SELECT * from `donor_register` ORDER BY `dnr_blood_donate` LIMIT 4 ";
   $result = $conn->query($sql);
   $dnrcount   = $result->num_rows;
   while($row = $result->fetch_assoc()){

   $last =  $row['dnr_blood_donate'];
   $createDate = new DateTime($ac_join);
   $strip = $createDate->format('d-m-Y');
   $effectiveDate = date('d-m-Y', strtotime("+3 months", strtotime($last)));

   if($effectiveDate > $last )
    {  ?>
      <div class="col-xl-3 col-lg-3 col-md-6">
         <div class="single-member">
            <a href="donor-profile.php?did=<?=$did;?>">
               <div class="part-img">
                  <img src="assets/image/donor/<?=$image;?>" alt="Donor image" style="height: 250px; width: 250px;"/>
               </div>
            </a>
            <div class="part-text">
               <a href="donor-profile.php?did=<?=$did;?>">
                  <h3><?=$fullname;?></h3>
               </a>
               <h4>Blood group : (<?=$bgroup;?>)</h4>
            </div>
            <div class="part-social">
               Last Blood Donation : <?=$last;?>
            </div>
         </div>
      </div>
<?php $i++; } ?>

最佳答案

我认为您要计算两个日期之间的偏差，如果偏差大于3个月，请采取措施。在我的示例中，date_1等于25-04-2019，而date_2等于now。我想知道从date_1到now是否经过了3个月。

这是您的代码：

$date1 = new DateTime("25-04-2019");   //****** This is date_1 and in your code, you get this date from the database.
$date2 = new DateTime();    //****** This is date_2, I assume it is now.

$periodOfTime = 90;  //****** 3 months

if ($date1->diff($date2)->days > $periodOfTime) {
    echo "Three months passed from the date_1";
}
else {
    echo "Less than three months passed from the date_1";
}