Technique to create user friendly URLs [duplicate]

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Possible Duplicate:

H开发者_开发知识库ow to create friendly URL in php?

I have read a lot of content on Google about turning

profile.php?id=24 into something more user friendly.

How would I go about redirecting a link like

www.site.com/profile/username

to

profile.php?id=userid (find from username)

Thanks

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This can be achieved with the Apache mod_rewrite RewriteEngine. An example .htaccess:

RewriteEngine On
RewriteRule ^/profile/username/([\d]+)$ profile.php?id=$1

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You can do that with apache rewrite rules.

Apache will internally rewrite a URL like /profile/username to profile.php?username=username.

Example: (place this in a .htaccess in the same directory than profile.php)

RewriteEngine On
RewriteRule ^/profile/(.*)$ profile.php?username=$1

If you profile.php script doesn't accept a username parameter, you could also include the user id in the user friendly url:

RewriteEngine On
RewriteRule ^/profile/(.*)-(\d+)$ profile.php?id=$2

This will rewrite urls like /profile/username-id to profile.php?id=id

See apahe mod_rewrite documentation.

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This is done by creating a RewriteRule in a .htaccess file, of by defining rules in httpd.conf. This works on Apache. I'm, not sure how to do this on other servers.

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When your users sign up, use a PHP or CGI script to make a file called "Username.txt" and store it in a folder called Profiles (as you have it). And inside the text file, make it generate the number (counting up or hashed?) Or use a rewrite service in Google or Apache.