使用JSON在PHP中自动完成

Question

谁能解释为什么此自动完成功能在localhost上有效，但在上传到服务器后却不起作用？

<tr><td>Part Name: </td><td><input type="text" name="PartNum" class="auto" id="pn" style="width:250px" required></td></tr>

                        <script type="text/javascript">
                            $(function() {
                                $(".auto").autocomplete({
                                    source: "autocomplete.php",
                                    minLength: 1
                                });
                            });
                        </script>

autocomplete.php

<?php


$conn = new mysqli($host, $username, $password, $db);

$searchTerm = "%{$_GET['term']}%";

$select = $conn->prepare("SELECT * FROM partindex WHERE PartNum LIKE ?");
$select->bind_param('s', $searchTerm);
$select->execute();
$result= $select->get_result();

while ($row = $result->fetch_assoc())
{
 $data[] = $row['PartNum'];
}
//return json data
echo json_encode($data);
?>

?>

感谢您的帮助。谢谢