Enabled Payment Experience

- Updated Api to enabled Payment Experience
- Updated Tests and Samples
- Added Json Validator
- Ability for PPModel to return array of self objects

sample/payment-experience/UpdateWebProfile.php

@@ -0,0 +1,32 @@
+<?php
+
+// #### Update Web Profile
+// Use this call to update an experience profile.
+// Documentation available at https://developer.paypal.com/webapps/developer/docs/api/#update-a-web-experience-profile
+
+// We will be re-using the sample code to get a web profile. GetWebProfile.php will
+// create a new web profileId for sample, and return the web profile object.
+/** @var \PayPal\Api\WebProfile $webProfile */
+$webProfile = require 'GetWebProfile.php';
+
+
+// Updated the logo image of presentation object in a given web profile.
+$webProfile->getPresentation()->setLogoImage("http://www.google.com/favico.ico");
+
+try {
+    // Update the web profile to change the logo image.
+    if ($webProfile->update($apiContext)) {
+        // If the update is successfull, we can now get the object, and verify the web profile
+        // object
+        $updatedWebProfile = \PayPal\Api\WebProfile::get($webProfile->getId(), $apiContext);
+    }
+} catch (\Exception $ex) {
+    echo "Exception: " . $ex->getMessage() . PHP_EOL;
+    if (is_a($ex, '\PayPal\Exception\PPConnectionException')) {
+        /** @var $ex \PayPal\Exception\PPConnectionException */
+        var_dump($ex->getData());
+    }
+    exit(1);
+}
+
+print_result("Updated Web Profile", "Web Profile", $updatedWebProfile->getId(), $updatedWebProfile);