php pdo 如何从数据库中提取和设置默认值

Question

$select_stmt = $db->prepare('SELECT * FROM new_product WHERE `user_id` = :id');
$select_stmt->execute(array(':id'=>$_GET['id']));
$row = $select_stmt->fetch(PDO::FETCH_ASSOC);

<div class="form-group">
  <label for="exampleFormControlSelect1">尺寸</label>
  <select class="form-control"  name ="Size" id="Size">
    <option>30*60</option>
    <option>15*90</option>
    <option>15*17.3</option>
  </select>
</div>

请问如何使用foreach将数据库中的值select带出为默认值。例如：我的数据库值为15 * 90，如何select option =15 * 90 我这里使用PDO

Answer 1

您需要创建一个循环来处理查询的所有结果，并将每一行的相关部分添加到 HTML

<?php
$select_stmt = $db->prepare('SELECT xx,desc FROM new_product WHERE `user_id` = :id');
$select_stmt->execute(array(':id'=>$_GET['id']));

?>  
<div class="form-group">
    <label for="exampleFormControlSelect1">尺寸</label>
    <select class="form-control"  name ="Size" id="Size">
<?php
while ( $row = $select_stmt->fetch(PDO::FETCH_ASSOC)) :
    // these are just example column names as you dont tell us 
    // what the columns you want to use are called

    echo "<option value='$row[xx]'>$row[desc]</option>";

endwhile;
?>
    </select>
</div>

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