php - 使用 PHP 设置选定的属性

Question

我有一个将选项值回显到选择输入的 while 循环，我想使用 html 的“Selected”属性，以便在提交后保留所选项目。

因此，如果用户选择了 2，则该项目在选择中仍处于事件状态，而不是像当前那样将其重置。

将“Selected”添加到循环中会使用最后一项。我不知道如何将“已选择”应用于仅被使用的项目。

<form action="#" method="post">
    <select name="object"><?php 

        $query = "SELECT object_id FROM objects";  
        $select_object_id = mysqli_query($connection, $query);

        while ($row = mysqli_fetch_assoc($select_object_id)) {
        $object_description = $row['object_id'];
        echo "<option value='$object_description'>{$object_description}</option>";

        }
    ?>
        </select>
    <input type="submit" name="submit" value="Select" />
    </form>

Answer 1

<form action="#" method="post">
<select name="object"><?php 

    $query = "SELECT object_id FROM objects";  
    $select_object_id = mysqli_query($connection, $query);

    while ($row = mysqli_fetch_assoc($select_object_id)) {
    $object_description = $row['object_id'];
    echo "<option ";
    if($object_description == $_POST['object'])
        echo 'selected ';
    echo "value='$object_description'>{$object_description}</option>";

    }
?>
    </select>
<input type="submit" name="submit" value="Select" />
</form>