Fix links to Developer API Reference

sample/billing/CreateBillingAgreementWithPayPal.php

@@ -3,7 +3,7 @@
 // # Create Billing Agreement with PayPal as Payment Source
 //
 // This sample code demonstrate how you can create a billing agreement, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#create-an-agreement
+// https://developer.paypal.com/docs/api/#create-an-agreement
 // API used: /v1/payments/billing-agreements
 
 // Retrieving the Plan from the Create Update Sample. This would be used to

sample/billing/CreatePlan.php

@@ -3,7 +3,7 @@
 // # Create Plan Sample
 //
 // This sample code demonstrate how you can create a billing plan, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#create-a-plan
+// https://developer.paypal.com/docs/api/#create-a-plan
 // API used: /v1/payments/billing-plans
 
 require __DIR__ . '/../bootstrap.php';

sample/billing/DeletePlan.php

@@ -3,7 +3,7 @@
 // # Delete Plan Sample
 //
 // This sample code demonstrate how you can delete a billing plan, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#retrieve-a-plan
+// https://developer.paypal.com/docs/api/#retrieve-a-plan
 // API used: /v1/payments/billing-plans
 
 // Retrieving the Plan object from Create Plan Sample

sample/billing/GetBillingAgreement.php

@@ -3,7 +3,7 @@
 // # Get Billing Agreement Sample
 //
 // This sample code demonstrate how you can get a billing agreement, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#retrieve-an-agreement
+// https://developer.paypal.com/docs/api/#retrieve-an-agreement
 // API used: /v1/payments/billing-agreements/<Agreement-Id>
 require __DIR__ . '/../bootstrap.php';
 

sample/billing/GetPlan.php

@@ -3,7 +3,7 @@
 // # Get Plan Sample
 //
 // This sample code demonstrate how you can get a billing plan, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#retrieve-a-plan
+// https://developer.paypal.com/docs/api/#retrieve-a-plan
 // API used: /v1/payments/billing-plans
 
 // Retrieving the Plan object from Create Plan Sample

sample/billing/ListPlans.php

@@ -3,7 +3,7 @@
 // # Get List of Plan Sample
 //
 // This sample code demonstrate how you can get a list of billing plan, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#list-plans
+// https://developer.paypal.com/docs/api/#list-plans
 // API used: /v1/payments/billing-plans
 
 // Retrieving the Plan object from Create Plan Sample to demonstrate the List
@@ -16,7 +16,7 @@ try {
     // Get the list of all plans
     // You can modify different params to change the return list.
     // The explanation about each pagination information could be found here
-    // at https://developer.paypal.com/webapps/developer/docs/api/#list-plans
+    // at https://developer.paypal.com/docs/api/#list-plans
     $params = array('page_size' => '2');
     $planList = Plan::all($params, $apiContext);
 } catch (Exception $ex) {

sample/billing/ReactivateBillingAgreement.php

@@ -3,7 +3,7 @@
 // # Reactivate an agreement
 //
 // This sample code demonstrate how you can reactivate a billing agreement, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#suspend-an-agreement
+// https://developer.paypal.com/docs/api/#suspend-an-agreement
 // API used: /v1/payments/billing-agreements/<Agreement-Id>/suspend
 
 // Retrieving the Agreement object from Suspend Agreement Sample to demonstrate the List

sample/billing/SearchBillingTransactions.php

@@ -3,7 +3,7 @@
 // # Search Billing Transactions Sample
 //
 // This sample code demonstrate how you can search all billing transactions, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#search-for-transactions
+// https://developer.paypal.com/docs/api/#search-for-transactions
 // API used: GET /v1/payments/billing-agreements/<Agreement-Id>/transactions? start-date=yyyy-mm-dd&end-date=yyyy-mm-dd
 
 // Retrieving the Agreement object from Get Billing Agreement. This may not be necessary if you are trying to search for transactions of already created Agreement.

sample/billing/SuspendBillingAgreement.php

@@ -3,7 +3,7 @@
 // # Suspend an agreement
 //
 // This sample code demonstrate how you can suspend a billing agreement, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#suspend-an-agreement
+// https://developer.paypal.com/docs/api/#suspend-an-agreement
 // API used: /v1/payments/billing-agreements/<Agreement-Id>/suspend
 
 // Retrieving the Agreement object from Create Agreement Sample to demonstrate the List

sample/billing/UpdateBillingAgreement.php

@@ -3,7 +3,7 @@
 // # Update an agreement
 //
 // This sample code demonstrate how you can update a billing agreement, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#update-an-agreement
+// https://developer.paypal.com/docs/api/#update-an-agreement
 // API used: /v1/payments/billing-agreements/<Agreement-Id>
 
 require __DIR__ . '/../bootstrap.php';

sample/billing/UpdatePlan.php

@@ -3,7 +3,7 @@
 // # Update a plan
 //
 // This sample code demonstrate how you can update a billing plan, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#update-a-plan
+// https://developer.paypal.com/docs/api/#update-a-plan
 // API used:  /v1/payments/billing-plans/<Plan-Id>
 
 // ### Making Plan Active

sample/billing/UpdatePlanPaymentDefinitions.php

@@ -3,7 +3,7 @@
 // # Update a plan
 //
 // This sample code demonstrate how you can update a billing plan, as documented here at:
-// https://developer.paypal.com/webapps/developer/docs/api/#update-a-plan
+// https://developer.paypal.com/docs/api/#update-a-plan
 // API used:  /v1/payments/billing-plans/<Plan-Id>
 
 // ### Changing Plan Amount