php - 从 MySQL 数据库中预选的下拉列表值

Question

虽然我已经研究过，但我找不到任何解决方案。我需要获取数据库值(“默认值”)作为下拉列表的预选值。

<select name="listCustomer" id="listCustomer">
    <?php 
    $sql = mysqli_query($connection,"SELECT customer_name FROM customers");
    while ($row = mysqli_fetch_array($sql,MYSQLI_ASSOC)){
    echo "<option value=\"" .   $row['customer_name'] . "\">" . $row['customer_name'] . "</option>";}
    ?>
</select>

你能帮我解决这个问题吗？

Answer 1

只需在回显之前创建一个变量，例如:

$selected = ((strtolower($row['customer_name']) == 'default') ? 'selected' : '');

然后把 echo 改成这样:

echo '<option '.$selected.' value="'.$row['customer_name'].'">'.$row['customer_name'].'</option>';