MySQLi Multi_Query帖子

Question

I am sending data to my PHP API using JSON. I want to send a push notification to my Android user with this API. I am facing one strange issue in it. From JSON, I am sending Mobile Number , Mobile Number Status and User Id .

I have two table in my database:

1. user which has fields called id , fcm and fcm_enabled
2. number_list which has fields called number , name and user_id

Now I want to send a push notification to whichever number status we get from the JSON in 1 . To send the notification it needs to check if fcm_enabled=1 , then it needs to get the fcm key from the fcm field from table 1 's user, and name from table 2 's name.

It's working fine under normal conditions, but if two users have the same mobile number, then I am getting two notifications on one device, and one notification on the other.

I think there's something wrong in my query. Let me know if someone can help me solve my issue. I have been trying from the last two days but, have had no success.

$number = $_GET["number"];
$status = $_GET["status"];
$userIds = $_GET["userId"];
$sql = "";
for($i = 0; $i < count($number); $i++) {
    if($status[$i] == 1) {
        $sqlSelect = "SELECT t2.name, t1.fcm, t1.fcm_enabled FROM user AS t1 INNER JOIN number_list AS t2 ON t1.id = t2.user_id WHERE t2.number = '$number[$i]'";
        $resultSelect = $conn->query($sqlSelect);
        if($resultSelect) {
            while($row = $resultSelect->fetch_row()) {
                if($row[2] == 1) {
                    sendFCM(array("title" => $row[0] . " is Online", "body" => ""), array("message" => ""), $row[1]);
                }
            }
        }
    }
}

Thanks.

Answer 1

If there is same number is for two users, may be it fetches duplicates records of users. "Group By" the number for fetching can help you.

Updated the query with following:

$sqlSelect = "SELECT t2.name, t1.fcm, t1.fcm_enabled FROM user AS t1 INNER JOIN number_list AS t2 ON t1.id = t2.user_id WHERE t2.number = '$number[$i]'  GROUP BY t1.id";