dedecms织梦联动筛选

<!-- HTML部分 -->
<select id="category">
    <option value="0">请选择分类</option>
    <option value="1">分类1</option>
    <option value="2">分类2</option>
</select>

<select id="product">
    <option value="0">请选择产品</option>
</select>

<script>
// JavaScript部分
document.getElementById('category').addEventListener('change', function() {
    var categoryId = this.value;
    var xhr = new XMLHttpRequest();
    xhr.onreadystatechange = function() {
        if (xhr.readyState == 4 && xhr.status == 200) {
            document.getElementById('product').innerHTML = xhr.responseText;
        }
    };
    xhr.open('GET', 'get_products.php?category=' + categoryId, true);
    xhr.send();
});
</script>

// get_products.php
<?php
$category = $_GET['category'];
// 根据分类查询产品数据
$products = array(
    1 => array('产品1', '产品2'),
    2 => array('产品3', '产品4')
);
echo '<option value="0">请选择产品</option>';
foreach ($products[$category] as $product) {
    echo '<option value="' . $product . '">' . $product . '</option>';
}
?>