Vanity URLs using PHP and htaccess

I am developing an app using PHP and I would like my users to be able to use their own vanity URLs.

In this format:

http://ex开发者_开发知识库ample.com/username

For example:

http://example.com/myCoolUsername

If I use this URL now the server thinks it is a folder but I know I should use a .htaccess file in a way but I do not know what content I should use in that file.

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This rule will rewrite http://domain.com/username to user.php with username as GET parameter (name).

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /user.php?name=$1

To test, create a file named user.php in your directory root ant put that in your file:

Access http://domain.com/blablaName123 and if everything works fine you should see string(13) "blablaName123"

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This assumes your index.php receives a $_GET['username'] to map to their vanity URL:

RewriteEngine On

# Make sure you only match on files/directories that don't actually exist
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

# Rewrite the first part after the `/` into a `username` parameter
RewriteRule ^(.+)$ /index.php?username=$1 [L,QSA]