PHP PayPal REST API authorization call - php

Question

I'm trying to use PHP and cURL to request an auth token from PayPal to create a payment.
my code is:
<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://api.sandbox.paypal.com/v1/oauth2/token");
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Accept: application/json',
'Accept-Language: en_US'
));
curl_setopt($ch, CURLOPT_USRPWD, 'xxxx:xxxx');
curl_setopt($ch, CURLOPT_POSTFIELDS, 'grant_type=client_credentials');
$output = curl_exec($ch);
?>
I get the response:
curl_setopt() expects parameter 2 to be long, string given in Users/anth/sites/abyss/auth.php on line 11
{"error":"invalid_client","error_description":"Invalid client credentials"}
line 11 is:
curl_setopt($ch, CURLOPT_USRPWD, 'xxxx:xxxx');
I have checked my Client ID and Secret and they are fine.
Does anyone know if I am using the wrong syntax or something?
Thanks

Answer 1

You have used the curl_setopt($ch, CURLOPT_USRPWD, 'xxxx:xxxx') instead of curl_setopt($ch, CURLOPT_USERPWD, 'XXXX:XXXX'); . Note the missed 'E' and apart from that you need to add one more line :
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
So the corrected version is below :
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://api.sandbox.paypal.com/v1/oauth2/token");
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Accept: application/json',
'Accept-Language: en_US'
));
curl_setopt($ch, CURLOPT_USERPWD, 'XXXX:XXXX');
curl_setopt($ch, CURLOPT_POSTFIELDS, 'grant_type=client_credentials');
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
$output = curl_exec($ch);
print_r($output);