Update README.md

Author: butschster

README.md

@@ -261,6 +261,12 @@ return [
 ];
 ```
 
+#### Useful links
+
+- [PHP SDK docs](https://docs.temporal.io/develop/php/) 
+- [Code samples](https://github.com/temporalio/samples-php)
+- [Taxi service sample](https://github.com/butschster/podlodka-taxi-service)
+
 ## Starting RoadRunner Server
 
 To start the RoadRunner server:
@@ -365,4 +371,4 @@ MIT License (MIT). Please see [`LICENSE`](./LICENSE) for more information.
 
 [roadrunner-cli]:https://github.com/spiral/roadrunner-cli
 
-[roadrunner-binary-releases]:https://github.com/roadrunner-server/roadrunner/releases
+[roadrunner-binary-releases]:https://github.com/roadrunner-server/roadrunner/releases