1. When an error similar to "File not found" occurs, check whether the location of the include file is correct. The following is the original quote from the PHP manual page:
Files for including are first looked in include_path relative to the current working directory and then in the directory of the current script. E.g. if your include_path is libraries, current working directory is /www/, you included include/a.php and there is include "b.php" in that file, b.php is first looked in / www/libraries/ and then in /www/include/. If filename begins with ./ or ../, it is looked only in include_path relative to the current working directory.
2. When an error similar to permission deny occurs , exclude according to the following methods
a) Check whether the read permission of the included file is turned on
b) Check whether the x permission of each directory on the included file path is turned on. This permission determines whether the directory can be browsed. .