如何显示数据库中的对象数据

所以我在应用程序，涉及利用用户资料数据从FB。但并非所有用户都维护相同的数据，因此我使用函数来确定丢失了哪些数据，然后向用户请求适当的数据。这些请求来自数据库。该函数的基本示例如下:

  function getEmploymentInfo () {
        if (isset($this->employer) and (!isset($this->jobtitle))) {
            $id = 1;
        } elseif (!isset($this->employer)) {
            $id = 2;
        }
        echo $this->get_profile($id);
    }

get profile函数是这样的:

 function get_profile($id) {
$dsn = "mysql:host=localhost;dbname=software";
$username = "root"; // database username
$password = "*******"; // database password
try {
    $enter = new PDO($dsn, $username, $password);
    $sql = "SELECT response FROM getprofile WHERE response_id = ? ";
    $new_item = $enter->prepare($sql);
            $new_item->setFetchmode(PDO::FETCH_ASSOC);
    $new_item->execute(array($id));
    foreach($new_item as $nw) {
        return $nw['response'];
    }
} catch (Exception $e) {
    echo $e->getMessage();
    exit;
}
return "";
    }

和来自数据库的$id=1看起来像这样:

 <script type="text/javascript">
 function getJobTitle(){
document.getElementById("JobTitle").hidden = true;
document.getElementById("two").hidden = false;

}

 function getStartDate(){
document.getElementById("StartDate").hidden = true;
document.getElementById("three").hidden = false;

}

function getEndDate(){
document.getElementById("EndDate").hidden = true;
document.getElementById("four").hidden = false;

}

<?php
echo "$objUser->employer";
?>
<form action="newprofile.php" method="post">
<p><a id="JobTitle" href="#" onclick="getJobTitle()">Add Job Title</a><input       type="text" name="jobtitle" id="two" hidden="true" value="Add Job Title"></input></p>
<p><a id="StartDate" href="#" onclick="getStartDate()">Add Start Date</a><input    type="text" name="startdate" id="three" hidden="true" value="Add Start Date"></input></p>
<p><a id="EndDate" href="#" onclick="getEndDate()">Add End Date</a><input type="text"   name="enddate" id="four" hidden="true" value="Add End Date"></input></p>
<input type="submit" value="submit"></form>

但是当这段代码从数据库返回到页面回显"$objUser->employer";不填充。同时，如果我写的代码直接在页面上，它的工作。到底发生了什么事?