GCM canonical id

Question

When having multiple regids for 1 device GCM returns the canonical id error:

{\"multicast_id\":xxxx,\"success\":2,\"failure\":0,\"canonical_ids\":1,\"results         


        

Answer 1

 $val) {
        if (isset($val['registration_id'])) {
            $c_ids[] = $k;
        }
    }
    if ($c_ids) {
        return $c_ids;
    } else {
        return false;
    }
}

// Find Duplicate registration Ids from Server Matchind to index position
function DuplicateRegIdFromRegistrationTable($canonical_ids)
{

    DB::query("SELECT registration_id FROM gcm_registration_table");
    $results = DB::fetch_assoc_all();
    $duplicate_reg_val = array();

// Match Position and Find Value
    foreach ($results as $key => $val) {
        if (in_array($key, $canonical_ids)) {
            $duplicate_reg_val[] = $val['registration_id'];
        }
    }

    return $duplicate_reg_val;
}

// update existing Duplicate registration id with New Canonical registration ids
function UpdateDuplicateRegIds($duplicateVal)
{

    foreach ($duplicateVal as $val) {
        $sql = "UPDATE gcm_registration_table SET registration_id = {$val} WHERE registration_id ={$val}";
// Some Yours Code...
    }
}

// Method to send Notification to GCM Server
function SendGcmNotification($registatoin_ids_from_table, $message, $gcm_api_key, $dry_run = false)
{

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

    $fields = array(
        'registration_ids' => $registatoin_ids,
        'data' => $message,
        'dry_run' => $dry_run
    );

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

//print_r($headers);
// Open connection
    if (!class_exists('curl_init')) {
        $ch = curl_init();
    } else {
        echo "Class Doesnot Exist";
        exit();
    }


// 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);

// Disabling SSL Certificate support temporarly
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

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

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

    if ($result === FALSE) {

        die('Curl failed: ' . curl_error($ch));
        return false;
    } else {
        return json_decode($result, true);
    }

// Close connection
    curl_close($ch);
}


//This Wont Send Notification to Device but gives you response to remove canonical ids
$gcm_response = SendGcmNotification($registatoin_ids_from_table, $message, $gcm_api_key, $dry_run = true);

$canonical_ids = CanonicalIdPosition($gcm_response);

if ($canonical_ids) {
    $duplicate_ids = DuplicateRegIdFromRegistrationTable($canonical_ids);
    UpdateDuplicateRegIds($duplicate_ids);
}

// Finally Get updated Registration Ids from table and send to GCM Server with
$gcm_response = SendGcmNotification($registatoin_ids_from_table, $message, $gcm_api_key, $dry_run = false);