Blumentals Software Community

Hello, Talking to a friend (prof. software programmer) of my about a mistake in php code I made. He asked if it was possible to singe step the code. I think not but mybe its possible. But PHP error handeling says error at line x found. I'm just a starter and say something stupid before I think. So ...

I don't know how to say but I'will discribe. Some way of keeping versions and go back to an ealier version. Before you messed up.

If I change my code and look with the preview option to the output and refresh the window no refresh is done. results in preview window after running code 1st time: 1 result found 2nd time: error (made a change into the code with mistake on purpose) 3rd tine: error (changed the code to its original ...