Access forbidden! You don't have permission to access the requested object. It is either read-protected or not readable by the server

For a long time not to get Apache and PHP, suddenly encountered this wonderful problem, would like to directly on the Internet to find ready-made solutions, the results of online search took a lot of effort, also did not find the reason.

Later read the log file: Apache\logs\error.log found clues.

[Core:error] [PID 200:tid 1704] (20024) The given path is misformatted or contained invalid characters: [client 127.0.0.1:51040] ah00127:cannot map GET/.../%3c? %20echo%20$url%20?%3e http/1.1 to file, Referer:

After talking about%3c?%20echo%20$url%20?%3e decoding, I have a few in mind.

<? echo $url?>

It's probably not PHP-enabled Short_open_tag.

Open Php\php.ini Modify Short_open_tag = On, restart Apache, the test is no problem.

Access forbidden! You don't have permission to access the requested object. It is either read-protected or not readable by the server