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/PartiallyUpdateWebProfile.php

@@ -0,0 +1,48 @@
+<?php
+
+// #### Partially Update Web Profile
+// Use this call to partially update a web experience profile.
+// Documentation available at https://developer.paypal.com/webapps/developer/docs/api/#partially-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';
+
+// ### Create Patch Operation
+// APIs allows us to pass an array of patches
+// to make patch operations.
+// Each Patch operation can be created by using Patch Class
+// as shown below
+$patchOperation1 = new \PayPal\Api\Patch();
+// The operation to perform. Required. Allowed values: add, remove, replace, move, copy, test
+$patchOperation1->setOp("add")
+    // string containing a JSON-Pointer value that references a location within the target document (the target location) where the operation is performed. Required.
+    ->setPath("/presentation/brand_name")
+    // New value to apply based on the operation.
+    ->setValue("New Brand Name");
+
+// Similar patch operation to remove the landing page type
+$patchOperation2 = new \PayPal\Api\Patch();
+$patchOperation2->setOp("remove")
+    ->setPath("/flow_config/landing_page_type");
+
+
+//Generate an array of patch operations
+$patches = array($patchOperation1, $patchOperation2);
+
+try {
+    // Execute the partial update, to carry out these two operations on a given web profile object
+    if ($webProfile->partial_update($patches, $apiContext)) {
+        $webProfile = \PayPal\Api\WebProfile::get($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("Partially Updated Web Profile", "Web Profile", $webProfile->getId(), $webProfile);