php - How to build a web site which gives a sub-domain dynamically to every registered user? -

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possible duplicate:
create subdomain upon user registration

suppose have site, , wish give sub-domain each registered users. site, http://site.com/.

and test-user user registered on site, , site wants make sub-domain user.

like http://test-user.site.com.

like http://test-user1.site.com test-user1.

i hope understood requirement. how can create sub-domain using sites back-end or dynamically while registering?

  1. make dns record bring * requests site ip.
  2. set web server handle * requests (thanks @animuson mentioning)
  3. check $_server['http_host'] against database.
  4. profit!!!

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