Php JSON响应数组

我有这个php代码。如您所见，我通过函数showallevents查询mysql数据库。我将$result返回给$event变量。使用while循环，我将从事件中获得的值分配给响应数组，每次循环发生时，行都存储在数据数组中。我肯定在某个地方失败了，因为尽管我得到了正确数量的响应，但我在json上得到的所有值都是“null”。它还告诉我，关于JSONarray的一些信息无法转换为jsonobject

 if (isset($_POST['tag']) && $_POST['tag'] != '') 
 {
// get tag
$tag = $_POST['tag'];

// include db handler
require_once 'include/DB_Functions.php';
$db = new DB_Functions();

// response Array
$response = array("tag" => $tag, "success" => 0, "error" => 0);

// check for tag type
if ($tag == 'showallevents') 
{
    // Request type is show all events
    // show all events
    $event = $db->showallevents();
    if ($event != false)
    {
    $data = array();
    while($row = mysql_fetch_assoc($event)) 
        {
        $response["success"] = 1;
        $response["uid"] = $event["uid"];
        $response["event"]["date"] = $event["date"];
        $response["event"]["hours"] = $event["hours"];
        $response["event"]["store_name"] = $event["store_name"];
        $response["event"]["event_information"] = $event["event_information"];
        $response["event"]["event_type"] = $event["event_type"];
        $response["event"]["Phone"] = $event["Phone"];
        $response["event"]["address"] = $event["address"];
        $response["event"]["created_at"] = $event["created_at"];
        $response["event"]["updated_at"] = $event["updated_at"];
        $data[]=$response;

        }
        echo json_encode($data);            
    }
    else 
    {
        // event not found
        // echo json with error = 1
        $response["error"] = 1;
        $response["error_msg"] = "Events not found";
        echo json_encode($response);
    }
}
  else 
 { 
echo "Access Denied"; 
 }
}
?>

DB_Functions.php

     <?php

    class DB_Functions 
   {

private $db;

//put your code here
// constructor
function __construct() 
{
    require_once 'DB_Connect.php';
    // connecting to database
    $this->db = new DB_Connect();
    $this->db->connect();
}

// destructor
function __destruct()
{

}


/**
 * Select all events that are after yesterday.
 */
public function showallevents()
{
   $result = mysql_query("SELECT * FROM events WHERE date >= CURDATE()");
   return($result);
   }

   }

  ?>

---

您的

$response

变量是什么？ 在PHP中，要创建关联数组，可以使用

=>

而不是

=

例如：

$array = ('key1' => 'value1', 'key2' => 'value2');

---

您已经合并了两段独立的代码，结果是一团混乱，结果不清楚

可以通过两种方式创建关联数组：

$array = (key=>value, key2=>value2);

您还可以使用：

$array[key]=value;
$array[key2]=value2;

请注意，“键”和“值”都只是变量；您可以在那里使用字符串，也可以从其他地方传入变量

在做类似的事情时，我使用以下方法：

    $response["success"] = 1;
    $response["uid"] = $event["uid"];
    $response["event"]["date"] = $event["date"];
    $response["event"]["hours"] = $event["hours"];
    $response["event"]["store_name"] = $event["store_name"];
    $response["event"]["event_information"] = $event["event_information"];
    $response["event"]["event_type"] = $event["event_type"];
    $response["event"]["Phone"] = $event["Phone"];
    $response["event"]["address"] = $event["address"];
    $response["event"]["created_at"] = $event["created_at"];
    $response["event"]["updated_at"] = $event["updated_at"];
    $data[]=$response;

---

如果您只想返回所有数组，可以使用mysql\u fetch\u assoc代替mysql\u fetch\u行吗

    if ($tag == 'showallevents') 
{
    // Request type is show all events
    // show all events
    $event = $db->showallevents();
    if ($event != false)
    {
    $data = array();
    while($row = mysql_fetch_assoc($event)) 
        {
        $data[] = $row;
        echo json_encode($data);            
    }
    else 
    {
        // event not found
        // echo json with error = 1
        $response["error"] = 1;
        $response["error_msg"] = "Events not found";
        echo json_encode($response);
    }
}

     else
    {
echo "Access Denied";
   }
   }
  ?>

---

当我使用mysql_fetch_array命令时，它在$result处只返回1行。所以我得到了一些响应，但只有一行数据。@Fredrik感谢您指出我的错误，我更新了我的答案。使用此方法后，我设法得到了logcat 3响应，这应该是根据我执行的mysql查询应该得到的行数。。问题是它返回空值。它说jsonarray无法转换为jsonobject。猜测一下，检查showalleEvents（）函数的结果。它可能没有返回您认为的结果。事实并非如此，因为我希望返回的行是正确的。为了让事情变得更简单，我在showallevents的主代码之后发布了Db_functions.php。确切地说，是什么在说jsonarray不能转换为jsonobject？我发布了一张带有json响应的图片，其中一张带有空结果，另一张带有错误消息。顺便说一下，不管结果如何，谢谢你的时间。

 if (isset($_POST['tag']) && $_POST['tag'] != '') 
 {
// get tag
$tag = $_POST['tag'];

// include db handler
require_once 'include/DB_Functions.php';
$db = new DB_Functions();

// response Array
$response = array("tag" => $tag, "success" => 0, "error" => 0);

// check for tag type
if ($tag == 'showallevents') 
{
    // Request type is show all events
    // show all events
    $event = $db->showallevents();
    if ($event != false)
    {
    $data = array();
    while($row = mysql_fetch_assoc($event)) 
        {
        $response["success"] = 1;
        $response["uid"] = $event["uid"];
        $response["event"]["date"] = $event["date"];
        $response["event"]["hours"] = $event["hours"];
        $response["event"]["store_name"] = $event["store_name"];
        $response["event"]["event_information"] = $event["event_information"];
        $response["event"]["event_type"] = $event["event_type"];
        $response["event"]["Phone"] = $event["Phone"];
        $response["event"]["address"] = $event["address"];
        $response["event"]["created_at"] = $event["created_at"];
        $response["event"]["updated_at"] = $event["updated_at"];
        $data[]=$response;

        }
        echo json_encode($data);            
    }
    else 
    {
        // event not found
        // echo json with error = 1
        $response["error"] = 1;
        $response["error_msg"] = "Events not found";
        echo json_encode($response);
    }
}
  else 
 { 
echo "Access Denied"; 
 }
}
?>