Android中的错误：使用PHP的GCM

我在PHP中使用以下代码向Android发送GCM消息：

<?php
$apiKey = "xxxxx"; //my api key


$registrationIDs = array("APA91bGGN7o7AwVNnv35lwP5Jw8OTJQL331XcxPfEIu4xt-ZKLe6R0aSSbAve99uKSDXhzE9L2PVLihpqFt0DEawhymUs9h5ICbTMweMAEJypg6ZLFqmf6SOGlyULQzudw9MM1DjbPaaKbo--wxWoHGkjyec2H_63e7mesYjaRf4_rgxBe655M0");



// Message to be sent
$message = "Message Text";

// Set POST variables
$url = 'https://android.googleapis.com/gcm/send';

$fields = array(
                'registration_ids'  => $registrationIDs,
                'data'              => array( "message" => $message ),
                );

$headers = array( 
                    'Authorization: key=' . $apiKey,
                    'Content-Type: application/json'
                );

// Open connection
$ch = curl_init();

// Set the url, number of POST vars, POST data
curl_setopt( $ch, CURLOPT_URL, $url );

curl_setopt( $ch, CURLOPT_POST, true );
curl_setopt( $ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );

curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( $fields ) );

// Execute post
$result = curl_exec($ch);

// Close connection
curl_close($ch);

echo $result;

---

我终于找到了解决办法。我使用for循环将所有结果放入一个数组，并使用

JSON_encode（）将数组转换为JSON数组
由于数组索引没有正确排序，我得到了相同的错误。我使用PHP的sort（）函数修复了这个错误

排序前的

$registration_ids = Array
(
    [1] => "xxx"
    [6] => "xxx"
    [8] => "xxx"
)

sort($registration_ids);

$registration_ids = Array
(
    [0] => "xxx"
    [1] => "xxx"
    [2] => "xxx"
)

排序

$registration_ids = Array
(
    [1] => "xxx"
    [6] => "xxx"
    [8] => "xxx"
)

sort($registration_ids);

$registration_ids = Array
(
    [0] => "xxx"
    [1] => "xxx"
    [2] => "xxx"
)

排序后

$registration_ids = Array
(
    [1] => "xxx"
    [6] => "xxx"
    [8] => "xxx"
)

sort($registration_ids);

$registration_ids = Array
(
    [0] => "xxx"
    [1] => "xxx"
    [2] => "xxx"
)

传递到PHP的cURL

$fields = array(
    'registration_ids' => $ids,
    'data' => array('message' => $data)
);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));