如何用php和mysql做一个组合框？

Question

我试着用php和mysql做一个组合框，但是我找不到解决方案。我该如何修复这段代码？

$conn = new mysqli($servername, $username, $password, $db);
$result = mysqli_query($conn, "SELECT * FROM exemple") or die (mysqli_error($conn));
?>
<form action="" method="post">
  <h1>Combo</h1>
    <select name="cbx" id="cbx">
    <?php while($ri = mysql_fetch_array($result)) { ?>
      <option value="<?php echo $ri['exemp'] ?>">
        <?php echo $ri['exemp2'] ?>
      </option>
    </select>
    <?php } ?>
</form>

Answer 1

简单地，在</select>标记之前关闭while循环：

<form action="" method="post">
  <h1>Combo</h1>
  <select name="cbx" id="cbx">
    <?php while ($ri = mysql_fetch_array($result)) { ?>
    <option value="<?php echo $ri['exemp'] ?>"><?php echo $ri['exemp2'] ?></option>
    <?php } ?>
  </select>
</form>