Jquery自动完成不显示结果

Question

我正在使用JQuery自动完成功能：

<ul id="searchFilter">
    <li><input name="searchtext" id="searchtext" placeholder="Search..." /><input type="submit" class="prontoSubmit"  id="submit" name="submit" value="Go" />
    </li>
</ul>

然后是Jquery

$('#searchtext').autocomplete({source:'search.php', minLength:2});

调用search.php，返回基于$_REQUEST['term']的结果，我可以看到它的下一个工作调用，即工作正在给出预期的结果：

[{"label":"Parkside Semi II, Hamilton, Greenhill Glen","value":"Parkside Semi II"},{"label":"Parkside Semi, Hamilton, Greenhill Glen","value":"Parkside Semi"},{"label":"Parkside, Hamilton, Greenhill Glen","value":"Parkside"},{"label":"Parkview, Beamsville, Discovery","value":"Parkview"}]

但是我的自动填充功能没有显示结果......我做错了什么？

以下是search.php中的代码

<?php

include("classes/FunctionsClass.php");
include("classes/Class.php");

$functionClass = new FunctionsClass;
$class = new Class;

$connection = $functionClass->getConnection();

echo json_encode($class->getSearch($connection, $_REQUEST['term']));

?>

$connection是我的sqli连接（有效），这是我的班级：

function getSearch($connection, $term){
                $query = mysqli_query($connection, "SELECT home_title, rb_locations.locationLabel, rb_communities.rb_communityLabel FROM readyBuilt INNER JOIN rb_communities ON rb_communities.rb_communityId = readyBuilt.home_community INNER JOIN rb_locations ON rb_locations.locationId = readyBuilt.home_location WHERE home_title LIKE '" . $term . "%'");
                $results = array();
                while($row = mysqli_fetch_array($query)){
                        $results[] = array(
                                'label' => $row['home_title'] . ', ' . $row['locationLabel'] . ', ' . $row['rb_communityLabel'],
                                'value' => $row['home_title']
                        );
                }
                return $results;
        }