Paypal REST Api implmentation - php

Question

I am new to curl so I am using code found on the Paypal Developer blog and I am having a hard time getting it to work for me. Here is the code I am using
class paypal {
private $access_token;
private $token_type;
/**
* Constructor
*
* Handles oauth 2 bearer token fetch
* #link https://developer.paypal.com/webapps/developer/docs/api/#authentication--headers
*/
public function __construct(){
$postvals = "grant_type=client_credentials";
$uri = PAYMENT_URI . "v1/oauth2/token";
$auth_response = self::curl($uri, 'POST', $postvals, true);
$this->access_token = $auth_response['body']->access_token;
$this->token_type = $auth_response['body']->token_type;
}
/**
* cURL
*
* Handles GET / POST requests for auth requests
* #link http://php.net/manual/en/book.curl.php
*/
private function curl($url, $method = 'GET', $postvals = null, $auth = false){
$ch = curl_init($url);
//if we are sending request to obtain bearer token
if ($auth){
$headers = array("Accept: application/json", "Accept-Language: en_US");
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($ch, CURLOPT_USERPWD, CLIENT_ID . ":" .CLIENT_SECRET);
curl_setopt($ch, CURLOPT_SSLVERSION, 3);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
//if we are sending request with the bearer token for protected resources
} else {
$headers = array("Content-Type:application/json", "Authorization:{$this->token_type} {$this->access_token}");
}
$options = array(
CURLOPT_HEADER => true,
CURLINFO_HEADER_OUT => true,
CURLOPT_HTTPHEADER => $headers,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_VERBOSE => true,
CURLOPT_TIMEOUT => 10
);
if ($method == 'POST'){
$options[CURLOPT_POSTFIELDS] = $postvals;
$options[CURLOPT_CUSTOMREQUEST] = $method;
}
curl_setopt_array($ch, $options);
$response = curl_exec($ch);
$header = substr($response, 0, curl_getinfo($ch,CURLINFO_HEADER_SIZE));
$body = json_decode(substr($response, curl_getinfo($ch,CURLINFO_HEADER_SIZE)));
curl_close($ch);
return array('header' => $header, 'body' => $body);
}
// Function for Processing Payment
function process_payment($request) {
$postvals = $request;
$uri = PAYMENT_URI . "v1/payments/payment";
return self::curl($uri, 'POST', $postvals);
}
}
if (isset($_SESSION['payment_type']) && ($_SESSION['payment_type'] == 'paypal')) { // User has chosen to pay with Paypal.
// Retrive Shopping cart contents
$r = mysqli_query($dbc, "CALL get_shopping_cart_contents('$uid')");
$request = array(
'intent' => 'sale',
'redirect_urls' => array(
'return_url' =>'http://store.example.com/final',
'cancel_url' =>'http://store.example.com/payment'
),
'payer' => array(
'payment_method' =>'paypal'
),
'transactions' => array(
'amount' => array(
'total' =>''.number_format($order_total,2).'',
'currency' =>'USD',
'details' => array(
'subtotal' =>''.number_format($subtotal,2).'',
'shipping' =>''.number_format($shipping,2).''
),
'item_list' => array(
)
),
'description' =>'Mike and Maureen Photography - Order ID #'.$order_id.''
)
);
while ($items = mysqli_fetch_array($r, MYSQLI_ASSOC)) {
$newitems = array(
'quantity' =>''.$items['quantity'].'',
'name' =>''.$items['name'].'',
'price' =>''.get_price($items['price'],$items['sales_price']).'',
'currency' =>'USD'
);
$request['transactions']['amount']['item_list']['items'][] = $newitems;
}
$request = json_encode($request);
process_payment($request);
}
I am good with php but this whole class, public/private stuff is throwing me off. Can I use this code without that or will it open me up to trouble? How do I run the process_payment function without it throwing an error. I am getting "Fatal error: Call to undefined function process_payment()"
Didnt I just define the function in the paypal class? I have read through the documentation on paypal and I cant get a grasp on what I am doing wrong. Any help would be great.

Answer 1

The function process_payment() is part of the paypal class. To call it, you will have to do one of the ways outlined here: https://stackoverflow.com/a/4216347/1715048