我收到此错误：
Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42S02]: Base table or view not found: 1146 Table 'u471047401_test.Categories' doesn't exist' in /home/u471047401/public_html/inc/blocks/sidebar.php:13 Stack trace: #0 /home/u471047401/public_html/inc/blocks/sidebar.php(13): PDOStatement->execute(Array) #1 /home/u471047401/public_html/index.php(6): require('/home/u47104740...') #2 {main} thrown in /home/u471047401/public_html/inc/blocks/sidebar.php on line 13
这是我的代码：
<?
$cat = $_GET['cat'];
if( empty($cat) )
{
$cat = 0;
}
$menu_query = ("
SELECT cat_id, cat_name, parent_cat
FROM Categories
WHERE (cat_id = ? OR parent_cat = ?)");
$stm = $conn->prepare($menu_query);
$stm->execute(array($cat, $cat));
("u471047401_test.Categories");
$categories = $stm->fetchAll();
?>
<div class='col-4 col-lg-4 ' style='padding-left:0;'>
<ul class="nav nav-pills nav-stacked well;">
<?
foreach( $categories as $categories_row )
{
$act = $categories_row['cat_id'] == $cat ? 'active' : '';
echo"
<li class={$act}>
<a href='category.php?cat={$categories_row['cat_id']}'>
{$categories_row['cat_name']}
</a>
</li>";
if($categories_row['cat_id'] == $cat && $categories_row['cat_id'] > 0)
{
$back_link = " <li> <a href='category.php?cat={$categories_row['parent_cat']}' title='Go back to previous category'>Back</a> </li>";
}
}
?>
<?= $back_link ?>
</ul>
</div>