<p>我有一个组件，它从MySQL数据库中获取所有数据。</p> <pre class="brush:php;toolbar:false;">&lt;?php function component($productName, $productPrice, $productImg, $productID) { $element = &quot; &lt;div class='col-md-3 col-sm-6 my-3 my-md-0'&gt; &lt;form action='index.php' method='post' id='myform'&gt; &lt;div class='card shadow'&gt; &lt;img src='{$productImg}' alt='image1' class='img-fluid card-img-top'&gt; &lt;div class=\&quot;card-body\&quot;&gt; &lt;h5 class='card-title'&gt;{$productName}&lt;/h5&gt; &lt;/div&gt; &lt;p class='card-text'&gt;info goes here lorem ipsum&lt;/p&gt; &lt;span class='price'&gt;{$productPrice}&lt;/span&gt; &lt;span class='price'&gt;{$productID}&lt;/span&gt; &lt;div class='form-check form-switch'&gt; &lt;input class='form-check-input' type='checkbox' name='checkid[]' value='{$productID}'&gt; &lt;/div&gt; &lt;input type='hidden' name='product_id' value='{$productID}'&gt; &lt;/div&gt; &lt;/form&gt; &lt;/div&gt; &quot;; echo $element; }</pre> <p>我还有一个用于表单的提交按钮。 <code><button type="submit" name="submit" form="myform">显示所选内容</button></code></p> <p>获取容器的代码：</p> <pre class="brush:php;toolbar:false;">&lt;div class=&quot;container&quot;&gt; &lt;div class=&quot;row text-center py-5&quot;&gt; &lt;?php $result = $database-&gt;getData(); while ($row = mysqli_fetch_assoc($result)) { component($row['product_name'], $row['product_price'], $row['product_image'], $row['id']); } ?&gt; &lt;/div&gt;</pre> <p>当点击提交按钮时，用于检查容器是否被选中并返回其值（productID）的PHP代码。</p> <pre class="brush:php;toolbar:false;">if (isset($_POST['submit'])) { if (!empty($_POST['checkid'])) { foreach ($_POST['checkid'] as $value) { echo &quot;value : &quot; . $value . '&lt;br/&gt;'; } } }</pre> <p>我在数据库中有几个产品，但它只适用于第一个复选框。其他的不起作用。</p>

function component($productName, $productPrice, $productImg, $productID)
{
    $element = "    
                <div class='card shadow'>
                    <img src='{$productImg}' alt='image1' class='img-fluid card-img-top'>
                    <div class=\"card-body\">
                        <h5 class='card-title'>{$productName}</h5>
                    </div>
                    <p class='card-text'>info goes here lorem ipsum</p>
                    <span class='price'>{$productPrice}</span>
                    <span class='price'>{$productID}</span>
                    <div class='form-check form-switch'>
                        <input class='form-check-input' type='checkbox' name='checkid[]' value='{$productID}'>
                    </div>  
                    <input type='hidden' name='product_id' value='{$productID}'>

                </div>
    ";
    echo $element;
}

<div class="container">
    <div class="row text-center py-5">
<div class='col-md-3 col-sm-6 my-3 my-md-0'>
            <form action='index.php' method='post' id='myform'>
        <?php
        $result = $database->getData();
        while ($row = mysqli_fetch_assoc($result)) {
            component($row['product_name'], $row['product_price'], $row['product_image'], $row['id']);
        }
        ?>
<button type="submit" name="submit" form="myform">show selected</button>
            </form>
        </div>
    </div>