Paypal use of clientid & clientSecret for PHP - php

Question

I am using Paypal API for a long time for developing.
Now, my site is on life, and I have problems, of migrating my code to life,
and I presume that I need add clientid+clientSecret, which I didn't have on developing site.
(As I see on https://github.com/paypal/rest-api-sdk-php and by some workarround).
Also, I want minimal changes on the code bellow, even it seems old fashioned to have it worked in life web site.
As developer, I use "setExressCheckout" method like this
(Attention to echo $response - I don't expect that line. What to do instead?)
// =========== START OF CODE
<?php
/*.
require_module 'standard';
require_module 'standard_reflection';
require_module 'spl';
require_module 'mysqli';
require_module 'hash';
require_module 'session';
require_module 'streams';
.*/
require_once __DIR__ . "/stdlib/all.php";
/*. array .*/ $body_data = null;
$body_data_txt = "";
/*. string .*/ $htmlpage = "";
/*. array .*/ $tokenAr = array();
$response = "";
session_start();
$url = trim('https://www.sandbox.paypal.com/cgi-bin/webscr');
$body_data = array( 'USER' => "*******",
'PWD' => "*******",
'SIGNATURE' => "******",
'VERSION' => "95.0",
'PAYMENTREQUEST_0_PAYMENTACTION' => "Sale",
'PAYMENTREQUEST_0_AMT' => (string)$_SESSION["AMOUNT"],
'PAYMENTREQUEST_0_CURRENCYCODE' => 'USD',
'RETURNURL' => "*****",
'CANCELURL' => "******",
'METHOD' => "SetExpressCheckout"
);
$body_data_txt = http_build_query($body_data, '', chr(38));
try
{
//create request and add headers
$params = array(
'http' => array(
'protocol_version' => "1.1",
'method' => "POST",
'header' => "".
"Connection: close\r\n".
"Content-Length: ".strlen($body_data_txt)."\r\n".
"Content-type: "."application/x-www-form-urlencoded"."\r\n",
'content' => $body_data_txt
));
//create stream context
$ctx = stream_context_create($params);
//open the stream and send request
try {
$fp = fopen($url, 'r', false, $ctx);
} catch(ErrorException $e) {
throw new ErrorException("cannot open url" . $url . " error:" . $e->getMessage());
}
//get response
$response = (string)stream_get_contents($fp);
//check to see if stream is open
if ($response === "") {
throw new Exception("php error message = " . "$php_errormsg");
}
//close the stream
fclose($fp);
$key = explode("&", $response);
if (substr($response, 0, 1) === "<") {
echo $response; // ******************************
}
....
// ============ END OF CODE
The code doesn't work as expected, since the line 'echo $response ...' should not run.
It has the contents of a screen titled:
"No buyers or sellers
Sign up for free.
...
"
As I investigated, I need client-id and client-secret. That I made on https://developer.paypal.com.
But how to use it - with minimal changes on my code?
Thanks :)

Answer 1

I have found the solution for my question - No need for clientid and clientsecret.
The code work same for developing mode and life mode.
The url was wrong, and should be: $url = trim('https://api-3t.paypal.com/nvp');
Thanks, anyway :)