Paypal API with PHP and cURL - php

Question

I'm attempting "the first call" as outlined by the Paypal API documentation. This is the example provided that I'm following:
curl https://api.sandbox.paypal.com/v1/oauth2/token \
-H "Accept: application/json" \
-H "Accept-Language: en_US" \
-u "EOJ2S-Z6OoN_le_KS1d75wsZ6y0SFdVsY9183IvxFyZp:EClusMEUk8e9ihI7ZdVLF5cZ6y0SFdVsY9183IvxFyZp" \
-d "grant_type=client_credentials"
I have constructed a curl instance in PHP with all the above headers apart from the last one. What does a -d flag convert to as a curl option in PHP? There is little explanation there as far as I can tell. I managed to deduce -u as CURLOPT_USERPWD.

Answer 1

Having a good trawl around I pieced together parts from developers with other problems. I successfully gained my access token using the following code:
<?php
$ch = curl_init();
$clientId = "myId";
$secret = "mySecret";
curl_setopt($ch, CURLOPT_URL, "https://api.sandbox.paypal.com/v1/oauth2/token");
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERPWD, $clientId.":".$secret);
curl_setopt($ch, CURLOPT_POSTFIELDS, "grant_type=client_credentials");
$result = curl_exec($ch);
if(empty($result))die("Error: No response.");
else
{
$json = json_decode($result);
print_r($json->access_token);
}
curl_close($ch);
?>

Answer 2

#Lee point the right way but if u are using and old php version it wont work. But Lee version will not show up the error. Use these instead, i only add the error part to see what is going on.
$ch = curl_init();
$clientId = "";
$secret = "";
curl_setopt($ch, CURLOPT_URL, "https://api.sandbox.paypal.com/v1/oauth2/token");
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERPWD, $clientId.":".$secret);
curl_setopt($ch, CURLOPT_POSTFIELDS, "grant_type=client_credentials");
$result = curl_exec($ch);
$err = curl_error($ch);
$access_token="";
if ($err) {
echo "cURL Error #:" . $err;
}
else
{
$json = json_decode($result);
// print_r($json->access_token);
$access_token = $json->access_token;
}
If u are having and old PHP version it is posible it wont work and it will show this error:
cURL Error #:error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure
Just stack overflow it!
Here they discuss the problem

Answer 3

JSON and US English appear to be the Defaults, but to be in perfect compliance, add the following line:
curl_setopt($ch, CURLOPT_HTTPHEADER, "Accept: application/json, Accept-Language: en_US");