Finally, after uploading the application to our server, we can begin testing, operating, and using it. Remember that the code is compiled, so it will be hard to debug. This is because we don't know the exact line of code, the complexity of the code, and so on. If there are any errors, it's important that you return to your development environment, fix the version, test again to see what the error was, recompile, and upload the new files or the entire package to the server.
Also, there are some considerations you must remember: