PHP select 来自数据库的选项，结果未显示

Question

I'm trying to get selected option data from database, my selected option in web can't show anything but an arrow

<select>
    <?php
        $sql="SELECT * FROM `User`";
        $result=$database->getData($sql);
        while($row=mysqli_fetch_assoc($result)){
        ?>
        <option>
        <?=$row['LastName'].", " .$row['FirstName'];?></option>
    <?php }  ?>
</select>

Answer 1

Did u tried var_dump($result)? Is data there? if yes do this inside select.

<?php foreach($result as $row) : ?>
<option><?php echo $row['LastName'].", " .$row['FirstName'];?></option>
<?php endforeach; ?>

Answer 2

Try the below. I generally find it easier to read the code when I take steps to avoid dropping in and out of php. In your original code, it looks like you have an “=“ before $row['LastName'], which doesn't look right.

<select>
<?php
    $sql="SELECT * FROM `User`";
    $result=$database->getData($sql);
    while($row=mysqli_fetch_assoc($result)){
        echo “<option>“ . $row['LastName']. ", " .$row['FirstName'] . “</option>”;
    }
?>
</select>

Answer 3

I'm trying to get selected option data from database, my selected option in web can't show anything but an arrow

<select>
    <?php
        $sql="SELECT * FROM `User`";
        $result=$database->getData($sql);
        while($row=mysqli_fetch_assoc($result)){
        ?>
        <option>
        <?=$row['LastName'].", " .$row['FirstName'];?></option>
    <?php }  ?>
</select>