创建两个依赖的下拉列表

时间:2013-10-16 13:53:12

标签: php jquery html drop-down-menu

我必须根据第一个下拉列表中的选择填充第二个下拉列表。我在下面给出的代码获得第一个下拉列表,但第二个下拉列表是空的。有人可以帮我解决这个问题吗?

我使用此链接作为参考:http://www.sourcecodester.com/tutorials/php/5568/creating-dependent-dropdown-list-php-jquery-and-ajax.html

HTML:

form name="myselection" action="myselection.php" method="get">
<select name="parent_cat" id="parent_cat" placeholder="product"  required>
<option value="" selected="selected" disabled="true">Select One</option>

    <?php while ($row=mysqli_fetch_array($statement)):?>
    <option value="<?php echo $row['id'];?>"><?php echo $row['prodcat_name']; ?></option>
<?php endwhile ?>

</select>


<label>Sub Category</label>
<select name="sub_cat" id="sub_cat"></select>


<p><input type="submit"></p>
</form>

jQuery的:

<script type="text/javascript">
$(document).ready(function() {

    $("#parent_cat").change(function() {
        $(this).after('<div id="loader"><img src="img/loading.gif" alt="loading subcategory" /></div>');
        $.get('loadsubcat.php?parent_cat=' + $(this).val(), function(data) {
            $("#sub_cat").html(data);
            $('#loader').slideUp(200, function() {
                $(this).remove();
            });
        }); 
    });

});
</script>

loadsubcat.php

<?php 
$parent_cat = $_GET['parent_cat'];

 $conn = new mysqli("localhost", "root", "", "mydatabase");

    $selection =  "SELECT * FROM t_prodcategory WHERE prodcat_ID = {parent_cat}";

    $statement= mysqli_query($conn,$selection);


 while($row = mysqli_fetch_array($statement)) {

                      $pid=$row["prodcat_id"];
                      $product=$row["product"];
                echo '<option value="'.$pid.'" >'.$product.'</option>';
}

?>

0 个答案:

没有答案