<?php

// $data matches the documentation page parameters
$data = [
    'api_key' => 'API KEY', // your apikey on API Documentation page
    'action'  => 'based on parameter', // Based on parameter needed
    'service'  => '123456', // ID service on service page
    'data' => 'Your link', // link/username
    'quantity' => '1000' // your quantity order
];

$curl = curl_init();
curl_setopt_array($curl, array(
  CURLOPT_URL => "https://urltujuanAPI/", // change URL based on what you want to access, check on documentation page
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POST => true,
  CURLOPT_POSTFIELDS => http_build_query($data))
);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

echo !empty($err) ? $err : $response; // remove this if you on production