Once you have designed your form and applied your code you can easily generate the application for debugging by clicking on the generate code button. Initially, or when you have installed another runtime version, you need to generate including the run time library. What happens is that PHsPeed will generate a directory under your webserver and writes the generated code to that directory. By selecting the full run-time, PHsPeed will also move the run time library to your project.

Depending on the preferences PHsPeed will generate PHP helper code that allows the ide to intercept (error) messages, json strings etc. Besides that, once you have deployed your application to your test environment you are able to 'ordinary' debug your code by stepping through the code, setting breakpoints and evaluate variables and more.