Empty `include_path` in PHP default

Question

If I have an empty include_path in PHP (like include_path=: ), my include and require functions still work. It is like include tries the initial script's directory first, regardless of what your include_path is set to.

This gets more confusing to me when I set the include_path to something like /usr/lib/php5/ , and then try to include('test.php') from a script that has no test.php in the same directory. I would imagine it would look for test.php in my specified include_path if it wasn't present in the current directory.

I am not looking for a solution; I can already solve my current problem. I am looking for an explanation as to how include_path works. Thanks!

Answer 1

basically if you just speicfy the name of the file to be included without any path info then then include_path will be used.

ie

include 'wow.php';  (this will use include_path to try to find it) 

if it cant find it then it will look in the same directory as the file that tried to include it.

include '/blah/wow.php';

because this has some path info in it then it will ignore include_path all together.

Answer 2

用这个

include($_SERVER['DOCUMENT_ROOT'].'/test.php');