按钮上的增减变量-PHP Javascript

Question

我有一个“喜欢/不喜欢”按钮和“喜欢”数量字段，它回显一个获得“喜欢”数量的变量，如下所示：

PHP-HTML：

<span>likes: <?php echo $row['likes'];?></span>
<button type="submit"  class="btn btn-custom btn-sm liketoggle" name ="like">

//Printing 'Like' if its been liked by user, and 'Unlike' if not liked by user
<? $qid = $row['Question_ID']; $query2 = "SELECT * FROM likes WHERE 
       user_id='$user_id' and qid = '$qid'";
      $results2 = mysqli_query($con,$query2);
      if(mysqli_num_rows($results2) == 0){ echo '<span>Like</span>';} 
      else{echo '<span>Unlike</span>';}?></button>

Javascript-切换喜欢/不喜欢：

$(".liketoggle").click(function () {
            $(this).find("span").text(function(i, v){
               return v === 'Like' ? 'Unlike' : 'Like'
               return v === 'Unlike' ? 'Like' : 'Unlike'
            })
        });

有没有办法在用户点击喜欢时增加喜欢的数量（$ row ['likes']），而在不喜欢时以相同的方式减少喜欢的数量？