# Debugging - PHP SDK

> Effectively debug your Workflow in both development and production environments using Web UI, Temporal CLI, and performance metrics for optimal Worker and Server performance.

## Debugging 

### How to debug in a development environment 

In addition to the normal development tools of logging and a debugger, you can also see what's happening in your Workflow by using the [Web UI](/web-ui) or [Temporal CLI](/cli).

### How to debug in a production environment 

You can debug production Workflows using:

- [Web UI](/web-ui)
- [Temporal CLI](/cli)

You can debug and tune Worker performance with metrics and the [Worker performance guide](/develop/worker-performance).

Debug Server performance with [Cloud metrics](/cloud/metrics/) or [self-hosted Server metrics](/self-hosted-guide/production-checklist#scaling-and-metrics).