php - Fatal error: Class 'HttpRequest' not found in C:\xampp\htdocs\test -

in website using infobip 2-factor authentication security purpose. got code in website showing error

fatal error: class 'httprequest' not found in c:\xampp\htdocs\test\otp\send.php on line 2 

code following:

send.php

<?php $request = new httprequest(); $request->seturl('https://oneapi.infobip.com/2fa/1/pin'); $request->setmethod(http_meth_post); $request->setheaders(array   ('accept' => 'application/json'   ,'content-type' => 'application/json'   ,'authorization' => 'app secret_key'));   $request->setbody('{   "applicationid": "your_application_id",   "messageid": "your_message_id",   "to": "phone_number" }');  try     {         $response = $request->send();         echo $response->getbody();     }      catch (httpexception $ex)      {         echo $ex;     } ?> 

this following code request , showing

fatal error: class 'httprequest' not found in c:\xampp\htdocs\test\otp\request.php on line 3 

request.php

<?php $request = new httprequest(); $request->seturl('https://oneapi.infobip.com/2fa/1/pin/{pin_id}/verify'); $request->setmethod(http_meth_post); $request->setheaders(array('accept' => 'application/json', 'content-type' => 'application/json','authorization' => 'app your_api_key' )); $request->setbody('{"pin": "pin_code"}');  try    {        $response = $request->send();        echo $response->getbody();    }       catch (httpexception $ex)     {        echo $ex;    } ?> 

ok have file httprequest.php in same folder , in file

 class httprequest {     ... } 

then somewhere before calling it, need tell php it. done using 1 of 4 ways, way

require_once __dir__.'/httprequest.php'; //assuming it's in same folder. 

remember isn't magic, it's computer code. knows tell it. hope place got code have kind of basic instructions on how install set up, , read that.

now not confuse choices

include include_once require require_once 

i put these here illustrate that, things ( ) mean in programing. include, includes it, adding *_once, once, , require throw error if it's not found in location specified, making required. whereas include doesn't care if included or not.

good luck! happy coding.