For instance, in tumblr.com, the page link will be like tumblr.com/dashboard/x, and x means page number.
In php, i used to set page like /?page=x.
I am wondering that how to make it working like tumblr.com?
I do believe it's not a path that php created.
This is called URL rewriting and can be achieved with Apache's mod_rewrite for example : http://httpd.apache.org/docs/current/mod/mod_rewrite.html
here you apache rewrite mode will take care of this you have to add the rewrite rules in the .htaccess file
# enable apache morRewrite module #
RewriteEngine on
RewriteRule index([0-9]*).ht(m?ml?)$ ?page=$1 [QSA,L]
And you url will look like www.example.com/index12.html The 12 after index in the above url will treat as ?page=12
Hope it makes sense