Stateless PHP web services are widely used at Meta and they provide great developer experience. However, the stateless nature avoids the services to serve any real-time product experience since they cannot keep a persistent client-server connection or subscribe to server-side events and the constantly-changing data in the social graph. At Meta, we have built a stateful engine with a rich capability set, called BladeRunner, that can be leveraged by PHP developers to build interactive products between client and server where the server-side business logic resides in PHP. In practice, BladeRunner emulates a stateful PHP service such that product developers do not deal with complexities of maintaining long-lived connections and stateful services.