Hello I have a Problem with my PHP. Im coding in two ways:
This sounds like a caching problem. Try hitting Cmd+Shift+R* and see if the changes are instant then. If that's the problem, see this answer for how to disable the cache to prevent this problem.
Also, as loveNoHate points out in the comments, it is possible that this is a server- or ISP-side caching problem. Because you have the same problem running it locally on
MAMP, however, it sounds like a browser issue.
* The Mac OS X shortcut. For future visitors: you would use Ctrl+F5 for Windows.