charge-authorization.php

<?php
/* handles the call from your Android App, 
 *   Call thus > https://url.domain.tld/to/sample/charge-authorization.php
 * since your auth code should only be store don the server, we are assuming that calling charge authorization is 
 * only meant to be started by your server and not directly by the android app; you must have already saved the
 * authentication code against the user's email and both will be used together to make the charge call 
 */

require __DIR__ . '/paystack-class/Paystack.php';
require './functions.php';

// you may simply add the secret key you wish to use as the parameter when creating a paystack object,
// that's what we do here, as against the config array we used in charge-token.php
$paystack = new Paystack('sk_test_xxxx');

$auth_code = 'AUTH_code generated by calling charge-token.php with an email and a paystack token generated from android app';
$email = 'Email which must match authorisation code!';
// make sure we have a valid email and that our auth code starst with AUTH_
if ($email && is_string($auth_code) && (substr_compare($auth_code, 'AUTH_', 0, 5, true)===0)) {
  // get a code to use for this request
    $reference = getUnusedCode();
    $request['params'] = [
                'reference'=>$reference,
                'authorization_code'=>$auth_code,
                'email'=>$email,
                'amount'=>10000 // in kobo
              ];
// add the time of the request to the array
    $requset['time'] = gmdate("Y-m-d\TH:i:s\Z");
// add the user's ip to the array
    $request['ip'] = getIp();
              
  // log the request to our file-based storage
  // save the array to a file named by the code chosen
    file_put_contents('results/' . $reference . '-auth-request.json', json_encode($request));

  // make the paystack call - charge on the request params
    $body = $paystack->transaction->charge($request['params']);
//     header('Content-Type: application/json');
//     echo json_encode([$headers, $body, $code]);
  
  // test that the status code was 200 and the body gave status true, and there's data in body
    $response_data = $body->data;
    // save the response data for customer in database
      // we are using a file-based storage in results folder
        file_put_contents('results/' . $reference . '-response.json', json_encode($body));

      // in this sample we simply echo the status, rather you should go ahead and check
      echo $response_data->status;
 // data should also have status of success if the 100 naira charge was successful
    if ($response_data->status==='success') {
      // do what you need to do to serve your customer. payment went through
    }
  
} else {
    throw new \Exception('A valid email and a valid Paystack authorization code is required.');
}