How to define Workflow Parameters in PHP

A method annotated with #[WorkflowMethod] can have any number of parameters.

We recommend passing a single parameter that contains all the input fields to allow for adding fields in a backward-compatible manner.

Note that all inputs should be serializable to a byte array using the provided DataConverter interface. The default implementation uses a JSON serializer, but an alternative implementation can be easily configured. You can create a custom object and pass it to the Workflow method, as shown in the following example:

#[WorkflowInterface]
interface FileProcessingWorkflow {
    #[WorkflowMethod]
    public function processFile(Argument $args);
}