some website like youtube and myspace they provide to every user a link like domain/username. Do they create for each users a directory ?

Its called mod_rewrite. You use a .htaccess file to rewrite the url. For example:

The raw php URL will look like:

But with the following mod_rewrite code in a .htaccess file (In the root):


It will turn out like:

So overall, they are not real directories, they are actually getting the information from the database using php but its being rewrote using a .htaccess file.

Please note: I have not tested this code.

You should write a tutorial.

For all the mod rewrite tutorials I have read that is the first one that I could clearly follow. Going to have to go change my rewrite rules.

If you do not know regular expressions, thing will be hard.

__________________

What are your current rewrite rules, Krik, out of curiosity?

__________________
The man who comes back through the Door in the Wall will never be quite the same as the man who went out.

You may also want to change the mod_rewrite code I gave you a bit for validation as at the moment any characters can be used in the URL but you only want to allow alphanumeric chars.

Here is one good tutorial for you:
http://www.addedbytes.com/apache/url...for-beginners/