android - Using curl_multi_exec with gcm push notifications and PHP -

i have app configured send push notification via google/gcm. working fine, there 1000 limit per push notification. currently, have loop registration id's separate messages , send them in batches. question is, not familiar curl. how can utilize curl_mutli_exec speed push notifications , messages users less of delay.

here current way have set up. need utilize curl_mutli_exec? thanks!

$file = fopen("/gcmusers.key", "r") or exit("unable open file!");         //output line of file until end reached         $pcount = 0;         $registrationids = array();         while(!feof($file)) {                  $pid = fgets($file);                  $pcount = $pcount + 1;                 if ($pid <> '') {                         array_push($registrationids,$pid);                 }                  if ($pcount == 990) {                         // message sent                          $apikey = "myapikey";                          $url = 'https://android.googleapis.com/gcm/send';                          $fields = array('registration_ids'  => $registrationids, 'data' => array( "message" => $message, "pic" => $pic, "price" => $price, "item" => $item, "site" => $site, "refurb" => $refurb, "percent" => $percent, "buyurl" => $buyurl ),);                          $headers = array('authorization: key=' . $apikey, 'content-type: application/json');                          // open connection                         $ch = curl_init();                          // set 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);                          $registrationids = array();                         $pcount = 0;                  }          }