cUrl

$cURL = curl_init();

// set url
curl_setopt($cURL, CURLOPT_URL, $url);

// set method default is GET
// curl_setopt($cURL, CURLOPT_CUSTOMREQUEST, "POST");

// set header
$deviceId = '1234567890';  // custom header field
$appVersion = '1.0.0';  // custom header field

$header = array(
    'Content-Type: application/json',
    // 'Content-Length: ' . strlen($data_string)  // optional
    'Accept: application/json',
    'version: '.$appVersion,
    'deviceId: '.$deviceId
)

curl_setopt($cURL, CURLOPT_HTTPHEADER, $header);

// set json post data
$data = array("email" => "user@acc.com", "password" => "123456");
$data_string = json_encode($data);

curl_setopt($cURL, CURLOPT_POSTFIELDS, $data_string);

$result = curl_exec($$cURL);

// curl result:
{
  "status": 200,
  "message": "success",
  "result": [
    {
      "id": "5a6032ae755b9e0585dc8f21",
      "name": "Zone A",
      "address": "Lake Side"
    },
    {
      "id": "5a6032e0755b9e0585dc8f22",
      "name": "Zone B",
      "address": "Forest Side"
    },
    {
      "id": "5a6067db755b9e547bfa52c4",
      "name": "Zone C",
      "address": "Forest Side"
    }
  ]
}

// parse json result
$json = json_decode($result, true);

// '{"Cancelled":false,"MessageID":"402f481b-c420-481f-b129-7b2d8ce7cf0a","Queued":false,"SMSError":2,"SMSIncomingMessages":null,"Sent":false,"SentDateTime":"\/Date(-62135578800000-0500)\/"}'

// Array
// (
//     [Cancelled] => 
//     [MessageID] => 402f481b-c420-481f-b129-7b2d8ce7cf0a
//     [Queued] => 
//     [SMSError] => 2
//     [SMSIncomingMessages] => 
//     [Sent] => 
//     [SentDateTime] => /Date(-62135578800000-0500)/
// )