php kodumda problem var mı bakar mısınız?

<?php

$numaralar = [5051234567, 5441234568, 5448974521];

$numaralar =  implode(',', $numaralar);

function SMSgonderHttpGET($numaralar){

  $username = "850303xxxx"; //
  $password = urlencode("xxxx"); //

  $url= "https://api.netgsm.com.tr/sms/send/get/?usercode=kullanicidiniz&password=sifreniz&gsmno=".$numaralar."&message=testmesaji&msgheader=MesajBaslik";

  $ch = curl_init($url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  $http_response = curl_exec($ch);
  $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

  if($http_code != 200){
    echo "$http_code $http_response\n";
    return false;
  }
  $balanceInfo = $http_response;
  echo "MesajID : $balanceInfo";
  return $balanceInfo;
}

SMSgonderHttpGET($numaralar);
?>

function SMSgonderHttpGET($cekayar,$sms,$telno){
$username = $cekayar["netgsm_kullanici"]; //
$password = urlencode($cekayar["netgsm_sifre"]); //
$baslik = $cekayar["netgsm_baslik"];
$url = 'https://api.netgsm.com.tr/sms/send/get/?usercode='.$username.'&password='.$password.'&gsmno='.$telno.'&message='.$sms.'&msgheader='.$baslik;
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
$http_response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
return array("response" => $http_response, "http_code" => $http_code);
}

foreach($ceksuyeler as $m){ if(empty($telno)) {$telno = $m["tel"];} else{$telno .= ','.$m["tel"]; } }
$gonder = SMSgonderHttpGET($cekayar,$sms,$telno);
if($gonder['http_code'] == 200){
echo'<div style="text-align:center;" class="alert alert-success" role="alert"> Mesaj gönderildi!</div>';
}else{
echo'<div style="text-align:center;" class="alert alert-error" role="alert">Hata : '.$gonder['http_code'].' '.$gonder['response'].' </div>';
}