php创建响应json数组

我在创建JSON数组时遇到一些问题。它应该如下所示：

error : false
   duellid : 1
    questions : [
    {   questionid : xx
       question : lala
       answer : blabla },
    {   questionid : xx
       question : lala
       answer : blabla },
    {   questionid : xx
       question : lala
       answer : blabla }
]

目前的问题是在json响应中创建顶级数组问题：

$response["error"] = FALSE;
        $duellid = $duell["id"];

        $response["duell"] = $duellid;
        array_push($return_arr,$response);
        $response = array();
        $resultquestion = $db->getquestions($rows);
        while ($row = mysql_fetch_array($resultquestion)) {


            $response["question"]["id"] = $row["id"];
            $response["question"]["question"] = $row["question"];
            $response["question"]["answer"] = $row["answer"];
            $response["question"]["active"] = $row["active"];
            $response["question"]["minval"] = $row["minval"];
            $response["question"]["maxval"] = $row["maxval"];

            array_push($return_arr,$response);

        }


        echo json_encode($return_arr);

---

我认为这很容易，但我找不到正确的方法。

阵列推，将其推到阵列的末端。所以结果没有关键问题。而不是：

array_push($return_arr,$response);

简单地说：

$response = array('questions'=>array());
$response["error"] = FALSE;
$response["duell"] = $duell["id"];
$resultquestion = $db->getquestions($rows);
while ($row = mysql_fetch_array($resultquestion)) {
    $r = array();
    $r["id"] = $row["id"];
    $r["question"] = $row["question"];
    $r["answer"] = $row["answer"];
    $r["active"] = $row["active"];
    $r["minval"] = $row["minval"];
    $r["maxval"] = $row["maxval"];
    $response["questions"][] = $r;

    // or nicer:
    $response["questions"][] = array(
        'question' => 'Your question',
        'answer' => 'any answer'
    );
}
echo json_encode($response);

---

该死的，你跑得更快了，你可以描述你做了什么以及为什么，这会改进这个答案。@Rocky抱歉。我会从nextworks perfect开始关注的！谢谢！希望我能够自己在问题数组中添加一个新数组；）@你仍然可以编辑它（：它可以帮助其他人理解。

$response = array();
$response["error"] = FALSE;
$duellid = $duell["id"];
$response["duell"] = $duellid;
$resultquestion = $db->getquestions($rows);      
$response['questions'] = array();  
while ($row = mysql_fetch_array($resultquestion)) { 

    $result = array(
        'questionid' =>   $row["id"],
        'question' => $row["question"],
        'answer' =>  $row["answer"],
        'active' =>  $row["active"],
        'minval' =>  $row["minval"],
        'maxval' =>  $row["maxval"]

    );
    $response['questions'][]  = $result;             

}         
echo json_encode($response);