Question

我有一个简单的列表类型的php页面，它根据mysql查询列出项目，如：

mysql_select_db($database_connBHN, $connBHN);
$query_rsMarket = "SELECT * FROM my_items WHERE active=1 ORDER BY name asc";
$rsMarket = mysql_query($query_rsMarket, $connBHN) or die(mysql_error());
$row_rsMarket = mysql_fetch_assoc($rsMarket);
$totalRows_rsMarket = mysql_num_rows($rsMarket);

然后页面将这些项目及其描述列在单独的表中。

最初，此页面按字母顺序列出这些项目。现在我想在页面顶部放置一个下拉框，用户可以选择另外两到三个排序选项，如date或itemId等，这些值存储在数据库中。

如何在不离开该页面的情况下以简单的方式解决这个问题？（即我不想为每个不同的结果集创建单独的页面）

Answer 1

不，将此作为单个脚本保留更容易，只允许切换排序变量。出于安全考虑，最好将用户输入限制为PHP脚本中的每个定义的选项集：

$sort_options = array('name asc','name desc','dateadded asc','dateadded desc');
if(!isset($_GET['field'])){
   $_GET['field'] = 'name';
}
if (!isset($_GET['order'])){
   $_GET['order'] = 'asc';
}

$full_query_sort = $_GET['field'].' '.$_GET['order'];
if (!in_array($full_query_sort,$sort_options)){
   die('invalid selection');
}

mysql_select_db($database_connBHN, $connBHN);
$query_rsMarket = "SELECT * FROM my_items WHERE active=1 ORDER BY ".$full_query_sort;
$rsMarket = mysql_query($query_rsMarket, $connBHN) or die(mysql_error());
$row_rsMarket = mysql_fetch_assoc($rsMarket);
$totalRows_rsMarket = mysql_num_rows($rsMarket);

现在您可以使用_GET变量设置顺序：http://example.com/page.php?field=name&order=desc等。可以使用下拉菜单使用javascript（或表单提交）设置：

<select id='field_select' 
   name='field' 
   onchange="window.location='?field='+this.value+'&order='+document.getElementById('order_select').value;">
      <option value='name' <?php if(!isset($_GET['field']) || $_GET['field']=='name'){echo "selected";} ?>>Sort by Name</option>
      <option value='dateadded' <?php if(isset($_GET['field']) && $_GET['field']=='dateadded'){echo "selected";} ?>>Sort by Date Added</option>
</select>

<select id='order_select' 
   name='order' 
   onchange="window.location='?field='+document.getElementById('field_select').value+'&order='+this.value;">
      <option value='asc' <?php if(!isset($_GET['order']) || $_GET['order']=='asc'){echo "selected";} ?>>Ascending/option>
      <option value='desc' <?php if(isset($_GET['order']) && $_GET['order']=='desc'){echo "selected";} ?>>Decending</option>
</select>

下拉菜单在php页面上对查询结果进行排序

1 个答案: