Too many curl request for Apple Push Notifications

I am using this function to send push notifications

function SendPush($token,$message,$badge,$eventid) {

    $device_token   = $token;
    $pem_file       = '../pushcert.pem';
    $pem_secret     = 'pass';
    $apns_topic     = 'com.topic';


    $sample_alert = '{"aps":{"alert":"'. $message .'","sound":"default",
"badge":'. 
$badge .'}, "type":"attend", "eventID":"'.$eventid.'"}';
    $url = "https://api.push.apple.com/3/device/$device_token";

    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $sample_alert);
    curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER, true );
    curl_setopt($ch, CURLOPT_HTTPHEADER, array("apns-topic: $apns_topic"));
    curl_setopt($ch, CURLOPT_SSLCERT, $pem_file);
    curl_setopt($ch, CURLOPT_SSLCERTPASSWD, $pem_secret);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
    curl_setopt($ch, CURLOPT_TIMEOUT, 15);
    $response = curl_exec($ch);
    $sonuc = json_decode($response,true);

    if ($sonuc['reason'] == "BadDeviceToken" || $sonuc['reason'] == "Unregistered" ) {
        return false;
    } else {
        return true;
    }

}

It is working good. I can also detect the invalid tokens.
My problem is when I need to send over 1000 push notifications It takes too much time.
Is there a way to keep curl connection alive and send notifications faster without getting blocked by apple servers?


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