no response from paypal api dodirectpayment nvp php - php

Question

I am attempting to set up a paypal api using the dodirectpayment NVP which I have assembled some code from online resource but when I submit it I get no response whatsoever, just a white screen. I noticed my code doesn't have any echo in it, but I am not sure how to echo whatever response paypal sends. any assistance would be great. All the customer info and credentials are all from the sandbox. Thanks!
enter code here <?php
class Paypal {
/**
* Last error message(s)
* #var array
*/
protected $_errors = array();
/**
* API Credentials
* Use the correct credentials for the environment in use (Live / Sandbox)
* #var array
*/
protected $_credentials = array(
'USER' => 'centerfusiondesign-test_api1.gmail.com',
'PWD' => 'JBTYXGQHZY37RXGH',
'SIGNATURE' => 'ANRk81o3BhdjleyZOhWslseXywLQAfcftsn6e71ykaqxRzNASgC3NYUn',
);
/**
* API endpoint
* Live - https://api-3t.paypal.com/nvp
* Sandbox - https://api-3t.sandbox.paypal.com/nvp
* #var string
*/
protected $_endPoint = 'https://api-3t.sandbox.paypal.com/nvp';
/**
* API Version
* #var string
*/
protected $_version = ' 95.0';
/**
* Make API request
*
* #param string $method string API method to request
* #param array $params Additional request parameters
* #return array / boolean Response array / boolean false on failure
*/
public function request($method,$params = array()) {
$this -> _errors = array();
if( empty($method) ) { //Check if API method is not empty
$this -> _errors = array('API method is missing');
return false;
}
//Our request parameters
$requestParams = array(
'METHOD' => $method,
'VERSION' => $this -> _version
) + $this -> _credentials;
//Building our NVP string
$request = http_build_query($requestParams + $params);
//cURL settings
$curlOptions = array (
CURLOPT_URL => $this -> _endPoint,
CURLOPT_VERBOSE => 1,
CURLOPT_SSL_VERIFYPEER => true,
CURLOPT_SSL_VERIFYHOST => 2,
CURLOPT_CAINFO => dirname(__FILE__) . '/cacert.pem', //CA cert file
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_POST => 1,
CURLOPT_POSTFIELDS => $request
);
$ch = curl_init();
curl_setopt_array($ch,$curlOptions);
//Sending our request - $response will hold the API response
$response = curl_exec($ch);
//Checking for cURL errors
if (curl_errno($ch)) {
$this -> _errors = curl_error($ch);
curl_close($ch);
return false;
//Handle errors
} else {
curl_close($ch);
$responseArray = array();
parse_str($response,$responseArray); // Break the NVP string to an array
return $responseArray;
}
}
}
$requestParams = array(
'IPADDRESS' => $_SERVER['REMOTE_ADDR'],
'PAYMENTACTION' => 'Sale'
);
$creditCardDetails = array(
'CREDITCARDTYPE' => 'Visa',
'ACCT' => '4032032109229382',
'EXPDATE' => '012020',
);
$payerDetails = array(
'FIRSTNAME' => 'John',
'LASTNAME' => 'Doe',
'COUNTRYCODE' => 'US',
'STATE' => 'NY',
'CITY' => 'New York',
'STREET' => '14 Argyle Rd.',
'ZIP' => '10010'
);
$orderParams = array(
'AMT' => '500',
'ITEMAMT' => '496',
'SHIPPINGAMT' => '4',
'CURRENCYCODE' => 'GBP'
);
$item = array(
'L_NAME0' => 'iPhone',
'L_DESC0' => 'White iPhone, 16GB',
'L_AMT0' => '496',
'L_QTY0' => '1'
);
$paypal = new Paypal();
$response = $paypal -> request('DoDirectPayment',
$requestParams + $creditCardDetails + $payerDetails + $orderParams + $item
);
if( is_array($response) && $response['ACK'] == 'Failure') { // Payment successful
// We'll fetch the transaction ID for internal bookkeeping
$transactionId = $response['TRANSACTIONID'];
}
?>
I am a little new to PHP so hopefully my error want be too stupid, Thanks!

Answer 1

You seemed to have CURL peer certificate verification enabled, which you might want to disable for testing purpose until you have it setup on server.
Replace:
CURLOPT_SSL_VERIFYPEER => true,
CURLOPT_SSL_VERIFYHOST => 2,
CURLOPT_CAINFO => dirname(__FILE__) . '/cacert.pem', //CA cert file
with:
CURLOPT_SSL_VERIFYPEER => FALSE,
CURLOPT_SSL_VERIFYHOST => FALSE,
Also, to check the response, just add
print_r($response);
below:
$response = $paypal -> request('DoDirectPayment',
$requestParams + $creditCardDetails + $payerDetails + $orderParams + $item
);
Let me help you have the complete code below:
<?php
class Paypal {
/**
* Last error message(s)
* #var array
*/
protected $_errors = array();
/**
* API Credentials
* Use the correct credentials for the environment in use (Live / Sandbox)
* #var array
*/
protected $_credentials = array(
'USER' => 'centerfusiondesign-test_api1.gmail.com',
'PWD' => 'JBTYXGQHZY37RXGH',
'SIGNATURE' => 'ANRk81o3BhdjleyZOhWslseXywLQAfcftsn6e71ykaqxRzNASgC3NYUn',
);
/**
* API endpoint
* Live - https://api-3t.paypal.com/nvp
* Sandbox - https://api-3t.sandbox.paypal.com/nvp
* #var string
*/
protected $_endPoint = 'https://api-3t.sandbox.paypal.com/nvp';
/**
* API Version
* #var string
*/
protected $_version = ' 95.0';
/**
* Make API request
*
* #param string $method string API method to request
* #param array $params Additional request parameters
* #return array / boolean Response array / boolean false on failure
*/
public function request($method,$params = array()) {
$this -> _errors = array();
if( empty($method) ) { //Check if API method is not empty
$this -> _errors = array('API method is missing');
return false;
}
//Our request parameters
$requestParams = array(
'METHOD' => $method,
'VERSION' => $this -> _version
) + $this -> _credentials;
//Building our NVP string
$request = http_build_query($requestParams + $params);
//cURL settings
$curlOptions = array (
CURLOPT_URL => $this -> _endPoint,
CURLOPT_VERBOSE => 1,
CURLOPT_SSL_VERIFYPEER => FALSE,
CURLOPT_SSL_VERIFYHOST => FALSE,
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_POST => 1,
CURLOPT_POSTFIELDS => $request
);
$ch = curl_init();
curl_setopt_array($ch,$curlOptions);
//Sending our request - $response will hold the API response
$response = curl_exec($ch);
//Checking for cURL errors
if (curl_errno($ch)) {
$this -> _errors = curl_error($ch);
curl_close($ch);
return false;
//Handle errors
} else {
curl_close($ch);
$responseArray = array();
parse_str($response,$responseArray); // Break the NVP string to an array
return $responseArray;
}
}
}
$requestParams = array(
'IPADDRESS' => $_SERVER['REMOTE_ADDR'],
'PAYMENTACTION' => 'Sale'
);
$creditCardDetails = array(
'CREDITCARDTYPE' => 'Visa',
'ACCT' => '4032032109229382',
'EXPDATE' => '012020',
);
$payerDetails = array(
'FIRSTNAME' => 'John',
'LASTNAME' => 'Doe',
'COUNTRYCODE' => 'US',
'STATE' => 'NY',
'CITY' => 'New York',
'STREET' => '14 Argyle Rd.',
'ZIP' => '10010'
);
$orderParams = array(
'AMT' => '500',
'ITEMAMT' => '496',
'SHIPPINGAMT' => '4',
'CURRENCYCODE' => 'GBP'
);
$item = array(
'L_NAME0' => 'iPhone',
'L_DESC0' => 'White iPhone, 16GB',
'L_AMT0' => '496',
'L_QTY0' => '1'
);
$paypal = new Paypal();
$response = $paypal -> request('DoDirectPayment',
$requestParams + $creditCardDetails + $payerDetails + $orderParams + $item
);
print_r($response);
if( is_array($response) && $response['ACK'] == 'Failure') { // Payment successful
// We'll fetch the transaction ID for internal bookkeeping
$transactionId = $response['TRANSACTIONID'];
}
?>
Also, you might want to upgrade your sandbox business account to Pro, as refered to this link:
https://stackoverflow.com/a/21926016/4410290
hope this helps.. :)

Answer 2

If you're getting a blank white screen that means there's a PHP error happening but you don't have error reporting enabled.
Add this to the very top of your script.
error_reporting(E_ALL);
ini_set('display_errors', '1');
Then run the script again and you should see the error(s).