PayPal PHP Merchant SDK

POODLE Update

• Because of the Poodle vulnerability, PayPal has disabled SSLv3.
• To enable TLS encryption, the changes were made to PPHttpConfig.php in SDK Core to use a cipher list specific to TLS encryption.

    /**
	 * Some default options for curl
	 * These are typically overridden by PPConnectionManager
	 */
	public static $DEFAULT_CURL_OPTS = array(
		CURLOPT_SSLVERSION => 1,
		CURLOPT_CONNECTTIMEOUT => 10,
		CURLOPT_RETURNTRANSFER => TRUE,
		CURLOPT_TIMEOUT        => 60,	// maximum number of seconds to allow cURL functions to execute
		CURLOPT_USERAGENT      => 'PayPal-PHP-SDK',
		CURLOPT_HTTPHEADER     => array(),
		CURLOPT_SSL_VERIFYHOST => 2,
		CURLOPT_SSL_VERIFYPEER => 1,
		CURLOPT_SSL_CIPHER_LIST => 'TLSv1',
	);

• There are two primary changes done to curl options:
  • CURLOPT_SSLVERSION is set to 1 . See here for more information
  • CURLOPT_SSL_CIPHER_LIST was set to TLSv1, See here for more information

All these changes are included in the recent release, along with many other bug fixes. We highly encourage you to update your versions, by either using composer or running this command shown below:

curl -k -L https://raw.githubusercontent.com/paypal/merchant-sdk-php/stable/samples/install.php | php    
        OR        
wget  https://raw.githubusercontent.com/paypal/merchant-sdk-php/stable/samples/install.php
php install.php

This Classic SDK is not actively supported and will be deprecated in the future. For full support on new integrations, please use the PHP Rest SDK

The merchant SDK can be used for integrating with the Express Checkout, Mass Pay, Web Payments Pro APIs.

Prerequisites

PayPal's PHP Merchant SDK requires

• PHP 5.2 and above
• curl/openssl PHP extensions

Running the sample

To run the bundled sample, first copy the samples folder to your web server root. You will then need to install the SDK as a dependency using either composer (PHP V5.3+ only) or by running a custom installation script provided with the SDK.

If using composer, run composer update from the samples folder. Otherwise, run install.php from merchant-sdk-php/samples directory

   
    cd samples 
    curl  https://raw.github.com/paypal/merchant-sdk-php/stable/samples/install.php | php
        OR       
    php install.php

Using the SDK

To use the SDK,

• Create a composer.json file with the following contents.

{
    "name": "me/shopping-cart-app",
    "require": {
        "paypal/merchant-sdk-php":"v2.*"
    }
}

• Install the SDK as a dependency using composer or the install.php script.
• Require vendor/autoload.php OR PPBootStrap.php in your application depending on whether you used composer or the custom installer.
• Choose how you would like to configure the SDK - You can either
  • Create a hashmap containing configuration parameters and pass it to the service object OR
  • Create a sdk_config.ini file and set the PP_CONFIG_PATH constant to point to the directory where this file exists.
• Instantiate a service wrapper object and a request object as per your project's needs.
• Invoke the appropriate method on the service object.

For example,

	// Sets config file path(if config file is used) and registers the classloader
    require("PPBootStrap.php");
	
	// Array containing credentials and confiuration parameters. (not required if config file is used)
	$config = array(
       'mode' => 'sandbox',
       'acct1.UserName' => 'jb-us-seller_api1.paypal.com',
       'acct1.Password' => 'WX4WTU3S8MY44S7F'
       .....
    );

    // Create request details
    $itemAmount = new BasicAmountType($currencyId, $amount);
	$setECReqType = new SetExpressCheckoutRequestType();
	$setECReqType->SetExpressCheckoutRequestDetails = $setECReqDetails;

    // Create request
	$setECReq = new SetExpressCheckoutReq();
	$setECReq->SetExpressCheckoutRequest = $setECReqType;
	......

    // Perform request
	$paypalService = new PayPalAPIInterfaceServiceService($config);
	$setECResponse = $paypalService->SetExpressCheckout($setECReq);
	
    // Check results
	if(strtoupper($setECResponse->Ack) == 'SUCCESS') {
		// Success
	}  

Authentication

The SDK provides multiple ways to authenticate your API call.

	$paypalService = new PayPalAPIInterfaceServiceService($config);
	
	// Use the default account (the first account) configured in sdk_config.ini
	$response = $paypalService->SetExpressCheckout($setECReq);

	// Use a specific account configured in sdk_config.ini
	$response = $paypalService->SetExpressCheckout($setECReq, 'jb-us-seller_api1.paypal.com');
	 
	// Pass in a dynamically created API credential object
    $cred = new PPCertificateCredential("username", "password", "path-to-pem-file");
    $cred->setThirdPartyAuthorization(new PPTokenAuthorization("accessToken", "tokenSecret"));
	$response = $paypalService->SetExpressCheckout($setECReq, $cred);

SDK Configuration

The SDK allows you to configure the following parameters-

• Integration mode (sandbox / live)
• (Multiple) API account credentials.
• HTTP connection parameters
• Logging

Dynamic configuration values can be set by passing a map of credential and config values (if config map is passed the config file is ignored)

    $config = array(
       'mode' => 'sandbox',
       'acct1.UserName' => 'jb-us-seller_api1.paypal.com',
       'acct1.Password' => 'WX4WTU3S8MY44S7F'
       .....
    );
	$service  = new PayPalAPIInterfaceServiceService($config);

Alternatively, credential and configuration can be loaded from a file.

    define('PP_CONFIG_PATH', '/directory/that/contains/sdk_config.ini');
    $service  = new PayPalAPIInterfaceServiceService();

You can refer full list of configuration parameters in wiki page.

Please refer to the sample config file provided with this bundle for more.

Instant Payment Notification (IPN)

Please refer to the IPN-README in 'samples/IPN' directory.

Troubleshooting

• Issue with running samples

Links

• API Reference - https://developer.paypal.com/webapps/developer/docs/classic/api/#merchant
• If you need help using the SDK, a new feature that you need or have a issue to report, please visit https://github.com/paypal/merchant-sdk-php/issues