detect subdomain

[zzz]

How can I detect a subdomain?

Eg. Say it is store.mydomain.com I need to be able to get that "store" part.

Second question.

I have a site files located in public_html directory with includes and images. If I add a subdomain and would like to re-use some includes and images what is the best way of doing it without changing every img src and include's path to absolute path?

/public_html/index.php
/store/index.php

[bradgrafelman]

Try either

strtok($_SERVER['SERVER_NAME'], '.')

or

strtok($_SERVER['HTTP_HOST'], '.')

[zzz]

Great! The first question done. Thanks.

Regarding the second question. How do I reuse the includes in subdomain if the includes resign and point to pages in the main web directory? Would I have to change all links to absolute paths?

[nrg_alpha]

I would personally stick to absolute paths.. let $_SERVER['DOCUMENT_ROOT'] do the initial root path detection (this works regardless to localhost or your live webserver, and have the same file paths listed afterwards... (EDIT: the above variable is a relative path though)

include($_SERVER['DOCUMENT_ROOT'] . '/whateverFolder1/whateverfolder2/whateverFile.php');

this assumes you have your stuff in subfolders.. when it comes to images or includes, I always have those stuffed in separate subfolders.

EDIT: Of course, if the files you are trying to access is not on your own site, then complete absolute paths are needed.