$pem_file       =  'public/assets/pem/CannabisDispensaryDistribution.pem';
$pem_secret     = '';
$apns_topic     = 'com.dispensary.cannabis';
if(defined('CURL_HTTP_VERSION_2_0'))
{
   $devicetoken=['54688ae0e1ecc3bc0d517521f4935c014342ecca792ef798f0e63652a4620ed4','de963dfbc03f5de416c7d806e04a6f3276716f246942fa2a61cffa393a780120','a08832de8b72567aa487beefe50e4e29caaa4a51ab14706fc8f0ef9df1f6b9c4','48335901c12bf02a03cef453d2e7739eaac9779991cafef3fa70ffe587ea3f12'];

$sample_alert = '{"aps":{"alert":"hi","sound":"default"}}';
   foreach($devicetoken as $device_token)
   {
    $url = "https://api.development.push.apple.com/3/device/$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_HTTPHEADER, array("apns-topic: $apns_topic"));
    curl_setopt($ch, CURLOPT_SSLCERT, $pem_file);
    curl_setopt($ch, CURLOPT_SSLCERTPASSWD, $pem_secret);
    $response = curl_exec($ch);
    $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

//On successful response you should get true in the response and a status code of 200
     var_dump($response);echo "----";var_dump($httpcode);
    }
}
else{
   echo"NOt a supported version";
}

�@@uUnexpected HTTP/1.x request: POST /3/device/54688ae0e1ecc3bc0d517521f4935c014342ecca792ef798f0e63652a4620ed4 bool(true) ----int(0)