PHP GCM 未定义索引

Question

执行我的函数时，出现错误：

[23-Apr-2015 01:08:39 Europe/Berlin] PHP Notice: Undefined index: syncNewData in C:\xampp\index.php on line 972

对于行：$pushMessageTag = isset($_POST["syncNewData"]) ? $_POST["syncNewData"] : $_POST["syncNewData"]; 在函数中：

function updateDataGCM($db) {
    // Get all the GCM regIDs for anyone with new, "unseen" data:
    $sqlAllRegIds = 'select distinct gcm_registration_id 
                    from  users
                    where id in (
                    select distinct myId as usersID from  group_messages WHERE `read` = 1
                    UNION
                    SELECT distinct touid as usersID  from  messages where `read` = 1
                    UNION 
                    SELECT distinct invited_id as usersID from  event_invites where `status` = 1
                    UNION 
                    select distinct receiver_id as usersID from  group_invites where `status` = 1
                    UNION
                    select distinct requestId as usersID from  friends where `status` = 1
                    )';

    // Execute
    if ($resultIds = $db->query($sqlAllRegIds)) 
    {

        $pushMessageTag = isset($_POST["syncNewData"]) ? $_POST["syncNewData"] : $_POST["syncNewData"]; 
        $gcmRegIds = array($resultIds);
        $message = array("syncNewData" => $pushMessageTag);
        $pushStatus = sendPushNotificationToGCM($gcmRegIds, $message);
        return $pushStatus; 
    }   

}

不明白为什么会出现这个错误，如何缓解？

更新：

这是在用户发送消息后向 GCM 发送同步消息的操作：

case "sendGroupMessage":
        if ($userId = authenticateUser($db, $username, $password, $gcmregid)) 
        {   
            if (isset($_REQUEST['toGroupId']))
            {   // instead of toUserName it's to a groupId
                $toGroupName = $_REQUEST['toGroupName'];
                $toGroupId   = $_REQUEST['toGroupId'];  
                $message     = $_REQUEST['messageText'];
                $campaign    = $_REQUEST['campaign_id'];
                $location    = $_REQUEST['location_id'];

                // Query to get the users id's who are in the group but not the user sending the message        
                $sqlGroupMembers = "SELECT DISTINCT usersId from users_groups 
                     WHERE usersId != '".$userId."' AND groupId = '".$toGroupId."'";


                // Loop to create a copy of message for all users taht are part of that group
                if($getGroupMembersId = $db->query($sqlGroupMembers)) 
                {
                    while($rowGroupMembers = $db -> fetchObject($getGroupMembersId))
                    {
                        $sql22 = "INSERT INTO `group_messages` ..."                 

                        error_log("$sql22", 3 , "error_log");
                        if ($db->query($sql22)) 
                        {

                            $out = SUCCESSFUL;

                        }               
                        else 
                        {
                            $out = FAILED;
                        }                   

                    }               


                }

                // Send GCM to turn on devices:
                echo updateDataGCM($db);                

            }
            else
            {
                $out = FAILED;
            }           

        }
        else
        {
            $out = FAILED;
        }   
    break;

原updateDataGCM()

工作正常：

function updateDataGCM() {

    $gcmRegID  =  'test id'
    $pushMessage = $_POST["syncNewData"];   
    $gcmRegIds = array($gcmRegID);
    $message = array("syncNewData" => $pushMessage);
    $pushStatus = sendPushNotificationToGCM($gcmRegIds, $message);

    return $pushStatus;
}

Answer 1

您的 POST 数据不包含名为 syncNewData 的变量。这一行：

$pushMessageTag = isset($_POST["syncNewData"]) ? $_POST["syncNewData"] : $_POST["syncNewData"];

这似乎是在测试该变量是否存在，将参考 $_POST['syncNewData'] 它是否已设置。

你可能需要

$pushMessageTag = isset($_POST["syncNewData"]) ? $_POST["syncNewData"] : '';

这将 return 存在的变量 f，如果不存在则为空字符串

PHP GCM 未定义索引

PHP GCM Undefined Index

php

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google-cloud-messaging