<?php
 // Using cURL POST
  $key="YOUR-ACCOUNT-KEY";
  $network_provider="MTN, AIRTEL, GLO, 9MOBILE";
  $phone="SUBSCRIBER NUMBER";
  $response = httpPost("https://api.textng.xyz/vtu-airtime/",array("key"=>"$key","phone"=>$phone,"network_provider"=>"$network_provider","$amount"=>"$amount"));
  // using php curl
  function httpPost($url, $data) {
      $curl = curl_init($url);
      curl_setopt($curl, CURLOPT_POST, true);
      curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($data));
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
      $response = curl_exec($curl);
      curl_close($curl);
      echo $response;
  }
?>

{
    "status": true,
    "message": "ORDER-COMPLETED",
    "data": {
        "reference": "REFERENCE_ID",
        "purchase_amount": 100,
        "amount_charged": 98.50,
        "discount": 1.50
    }
}

{
    "status": false,
    "message": "Unable to process order at this time",
    "reason": ""
}