Paypal API, Curl not returning any output - php

Question

I'm trying to figure out the paypal API, and I have the following code, which should make a call, get an access token, and then make the API call. The first part works(up until the $accesstoken line), and returns the access token properly, but the second part doesn't return anything. The code this is supposed to mimic can be found here: Make Your First Call
$url = "https://api.sandbox.paypal.com/v1/oauth2/token";
$headers = array(
'Accept' => 'application/json',
'Accept-Language' => 'en_US',
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_POSTFIELDS, 'grant_type=client_credentials');
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_USERPWD, $clientID . ':' . $clientSecret);
$curl = curl_exec($ch);
$x = json_decode($curl, TRUE);
print_r($x);
$accesstoken = $x['access_token'];
$headers2 = array(
'Content-Type' => 'application/json',
'Authorization' => 'Bearer' . $accesstoken
);
$data = array(
"intent" => "sale",
"redirect_urls" => array(
"return_url" => "http://example.com/your_redirect_url/",
"cancel_url" => "http://example.com/your_cancel_url/"
),
"payer" => array(
"payment_method" => "paypal"
),
"transactions" => array(
"transactions" => array(
"total" => ".99",
"currency" => "USD"
)
)
);
$saleurl = "https://api.sandbox.paypal.com/v1/payments/payment";
$sale = curl_init();
curl_setopt($sale, CURLOPT_URL, $saleurl);
curl_setopt($sale, CURLOPT_VERBOSE, TRUE);
curl_setopt($sale, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($sale, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($sale, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($sale, CURLOPT_POSTFIELDS, json_encode($data));
curl_setopt($sale, CURLOPT_HTTPHEADER, $headers2);
$finalsale = curl_exec($sale);
$verb = json_decode($finalsale, TRUE);
print_r($verb);
Curl doesn't make complete sense to me, any help would be appreciated.
UPDATE:
I changed the format of the headers to:
$headers2 = array(
'Content-Type: application/json',
'Authorization: Bearer ' . $accesstoken
);
as per one of the answers. Now it is displaying:
[name] => MALFORMED_REQUEST
[message] => Incoming JSON request does not map to API request
[information_link] => https://developer.paypal.com/webapps/developer/docs/api/#MALFORMED_REQUEST
[debug_id] => f53a882702a04

Answer 1

You are not setting your headers correctly ...
$headers = array(
'Accept: application/json',
'Accept-Language: en_US'
);
and
$headers2 = array(
'Content-Type: application/json',
'Authorization: Bearer ' . $accesstoken
);
Is the correct format.
Also note the (space) after Bearer inbetween your $accesstoken
Edit: Update for your JSON ( i think this is right but echo it out and check it against the reference, I might have one to many array()
$data = array(
"intent" => "sale",
"redirect_urls" => array(
"return_url" => "http://example.com/your_redirect_url/",
"cancel_url" => "http://example.com/your_cancel_url/"
),
"payer" => array(
"payment_method" => "paypal"
),
"transactions" => array(array(
"amount" => array(
"total" => ".99",
"currency" => "USD"
)
)
)
);

Answer 2

You need a space here
$headers2 = array(
'Content-Type' => 'application/json',
'Authorization' => 'Bearer ' . $accesstoken // Added a space after Bearer
);
See if it works now

Answer 3

Change
curl_setopt($sale, CURLOPT_POSTFIELDS, json_encode($data));
to
curl_setopt($sale, CURLOPT_POSTFIELDS, $data);
The json encode function breaks it