title: is the url can manipulate using web programming language
body: <p>Im just surfing in the internet and i notice some url is form like this "samplesite.com/myname" is that "/myname" is a kind of diretory? is that mean that when someone successfully register in facebook.com they also create directory in thier server(facebook.com)?
  then my last question is, when i use some website like posting article website, after i successfully save or create an article, the url became like this, article.com/my-title-article.html, is that mean that when i successfully save my article, also the sive have some piece of code that enable the user to create its own html file?
  thank you, and sorry for my bad english</p>