How to set Workflow Retry Options in PHP

A Retry Policy can be configured with an instance of the RetryOptions object. To enable retries for a Workflow, you need to provide a Retry Policy object via ChildWorkflowOptions for child Workflows or via WorkflowOptions for top-level Workflows.

$workflow = $this->workflowClient->newWorkflowStub(
      CronWorkflowInterface::class,
      WorkflowOptions::new()->withRetryOptions(
        RetryOptions::new()->withInitialInterval(120)
      )
);

For more detailed information about RetryOptions object see retries for more details.