How does PHP scandir work?

Question

I need to scan directory /home/user/www/site/public_html/application (full path by root).
scandir does perform it with even just 'application' part of full path as argument and that's all going to be ok, I got now list of files and directories as result.
I am interesting how scandir does work with that path 'application' ? Ain't the argument should be a full path by root ?
I did not found any explanation to this behavior on official php.net, unfortunately.
Any idea, how it works? Thanks.

PS My DOCUMENT_ROOT is set to /home/user/www/site/public_html

Answer 1

对于相对路径，它基于脚本的当前工作目录，您可以在getcwd找到该目录。