数据未提取到下拉列表中

Question

我正在尝试从数据库中获取一些数据到下拉列表。但这行不通。这是我的代码。谢谢

<div class="col-md-5">
   <select multiple class="form-control" style="height: 100px" id="experienceEdit">
     <?php
         $sqlVessel = "SELECT * FROM vessel_types ORDER BY vessel_types ASC";
         $resultVessel = $conn->query($sqlVessel);

         if ($resultVessel->num_rows > 0) {
              // output data of each row
              while ($rowVessel = $resultVessel->fetch_assoc()) {
      ?>
      <option class="experienceValEdit"  value="<?php echo $rowVessel['idvessel_types']; ?>"><?php echo $rowVessel['vessel_types']; ?></option>
      <?php
            }
               } else {

               }
      ?>

Answer 1

选中此行。

  if ($resultVessel->num_rows > 0) {

应该有一个-

我认为这会产生一些错误。 @usinshif