PHP中的json_encode无法返回正确的结果

我试图将数据输入到具有CRUD操作的网格中，该网格称为Jquery JTable，但是Json从MYSQL表转换为JSON似乎存在某种错误，因为数据需要显示在表上看起来像这样：

{
    "Result":"OK",
    "Records":[
      {"PersonId":1,"Name":"Benjamin Button","Age":17,"RecordDate":"\/Date(1320259705710)\/"},
      {"PersonId":2,"Name":"Douglas Adams","Age":42,"RecordDate":"\/Date(1320259705710)\/"},
      {"PersonId":3,"Name":"Isaac Asimov","Age":26,"RecordDate":"\/Date(1320259705710)\/"},
      {"PersonId":4,"Name":"Thomas More","Age":65,"RecordDate":"\/Date(1320259705710)\/"}
    ]
}

但是，每当我json_encode在php中实现该功能时，它都会给我以下信息：

{
    "Result":"OK",
    "Records":[
        {"0":"1","PersonId":"1","1":"Benjamin Button","Name":"Benjamin Button","2":"17","Age":"17","3":"2011-12-27 00:00:00","RecordDate":"2011-12-27 00:00:00"},
        {"0":"2","PersonId":"2","1":"Douglas Adams","Name":"Douglas Adams","2":"42","Age":"42","3":"2011-12-26 00:00:00","RecordDate":"2011-12-26 00:00:00"},
        {"0":"3","PersonId":"3","1":"Isaac Asimov","Name":"Isaac Asimov","2":"26","Age":"26","3":"2011-12-28 00:00:00","RecordDate":"2011-12-28 00:00:00"},
        {"0":"4","PersonId":"4","1":"Thomas More","Name":"Thomas More","2":"61","Age":"61","3":"2011-12-27 00:00:00","RecordDate":"2011-12-27 00:00:00"},
        {"0":"5","PersonId":"5","1":"Ihsan Oktay Anar","Name":"Ihsan Oktay Anar","2":"44","Age":"44","3":"2012-01-03 20:55:02","RecordDate":"2012-01-03 20:55:02"}
    ]
}

这是我的PHP代码：

<?php

//Get records from database
$result = mysqli_query($conn, "SELECT * FROM people;");

//Add all records to an array
$rows = array();
while($row = mysqli_fetch_array($result))
{
    $rows[] = $row;
}

//Return result to jTable
$jTableResult = array();
$jTableResult['Result'] = "OK";
$jTableResult['Records'] = $rows;
print json_encode($jTableResult);

?>

该表被称为人，它有四个字段：personId，Name，Age和RecordDate。

任何想法将不胜感激。