<?php
 // set variables            
  $key="YOUR-ACCOUNT-KEY";
  $sender="YOUR-SENDER-NAME";
  $phone="PHONE-NUMBER";
  $message=str_replace(" ","|_","Your OTP is XXXXXX");
  $siscb="1";

  $arrContextOptions=array(
        "ssl"=>array(
            "verify_peer"=>false,
            "verify_peer_name"=>false,
        ),
    );
  file_get_contents("https://api.textng.xyz/dnd-free-route-sms/?key=$key&sender=$sender&phone=$phone&message=$message&siscb=$siscb", false, stream_context_create($arrContextOptions));
?>

<?php
  $key="YOUR-ACCOUNT-KEY";
  $sender="YOUR-SENDER-NAME";
  $phone="PHONE-NUMBER";
  $message=str_replace(" ","|_","Your OTP is XXXXXX"); //the str_replace() function is to replace the spacing in the text with '|_' so enable file_get_contents() function process the url
  $route="5";
  $siscb="1";
  $bypasscode="YOUR-BYPASS-CODE-API";

  // Get cURL resource
  $curl = curl_init();
  // Set some options - we are passing in a useragent too here
  curl_setopt_array($curl, [
    CURLOPT_RETURNTRANSFER => 1,
    CURLOPT_URL => 'https://api.textng.xyz/dnd-free-route-sms/?key=$key&sender=$sender&phone=$phone&message=$message&siscb=$siscb',
    CURLOPT_USERAGENT => 'TEXTNG'
  ]);
  // Send the request & save response to $resp
  $resp = curl_exec($curl);
  // Close request to clear up some resources
  curl_close($curl);
?>

x units used|| Status:Successful|| Route:3 || Type:single number|| Reference:##########|| CustomRef:###############

Error Invalid Key

Error Insufficient units

ERROR (the error description would be displayed here)