I wish to rewrite demands like:
How do i write a guide that may handle this?
Produce a .htaccess file using the below contents and put it inside your root web directory.
RewriteEngine On Options +Followsymlinks RewriteRule (.*) url.php?i=$1
That will produce a query string of
this/is/a/test rather than your asked for comma-separated value that's nothing a fast string-replace function (like
str_replace() in PHP) could not fix.